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Sample records for dyons

  1. "Triangular" extremal dilatonic dyons

    NASA Astrophysics Data System (ADS)

    Gal'tsov, Dmitri; Khramtsov, Mikhail; Orlov, Dmitri

    2015-04-01

    Explicit dyonic solutions in four-dimensional Einstein-Maxwell-dilaton theory are known only for three particular values of the dilaton coupling constant: a = 0 , 1 ,√{ 3}. However, numerical evidence was presented on existence of dyons admitting an extremal limit in theories with more general sequence of dilaton couplings a =√{ n (n + 1) / 2 } labeled by an integer n. Apart from the lower members n = 0 , 1 , 2, this family of theories does not have motivation from supergravity/string theory, and analytical origin of the above sequence remained unclear so far. We fill the gap showing that this formula follows from analyticity of the dilaton function at the AdS2 ×S2 event horizon of the extremal dyonic black hole, with n being the leading dilaton power in the Taylor expansion. We also derive generalization of this rule for asymptotically anti-de Sitter dyonic black holes with spherical, planar and hyperbolic topology of the horizon.

  2. Gravitating dyons in Vaidya geometry

    NASA Astrophysics Data System (ADS)

    Tripathi, Buddhi Vallabh; Nandan, Hemwati; Dehnen, Heinz; Purohit, K. D.

    2014-03-01

    Gravitating monopoles and dyons in Einstein-Yang-Mills (EYM) or Einstein-Yang-Mills-Higgs (EYMH) systems have been extensively studied for various curved space-times, including those of black holes. We construct dyonic solutions of the EYMH theory in Vaidya space-time using a set of generalized Julia-Zee ansatz for the fields. It is found that the dyonic charge is static in nature and it does not contribute to the energy of the null dust.

  3. Quaternionic Analysis of Generalized Electromagnetic Fields of Superluminal Dyons

    SciTech Connect

    Bisht, P. S.; Negi, O. P. S.

    2008-04-21

    Superluminal electromagnetic fields of dyons are described in T{sup 4}--space and Quaternion formulation of various quantum equations is derived. It is shown that on passing from subluminal to superluminal realm via quaternion the theory of dyons becomes the Tachyonic dyons. Corresponding field Equations of Tachyonic dyons are derived in consistent, compact and simpler form.

  4. Anomaly constraints on monopoles and dyons

    SciTech Connect

    Csaki, Csaba; Shirman, Yuri; Terning, John

    2010-06-15

    Fermions with magnetic charges can contribute to anomalies. We derive the axial anomaly and gauge anomalies for monopoles and dyons, and find eight new gauge anomaly cancellation conditions in a general theory with both electric and magnetic charges. As a by-product, we also extend the Zwanziger two-potential formalism to include the {theta} parameter, and elaborate on the condition for CP invariance in theories with fermionic dyons.

  5. Dual quantum electrodynamics: Dyon-dyon and charge-monopole scattering in a high-energy approximation

    SciTech Connect

    Gamberg, Leonard; Milton, Kimball A.

    2000-04-01

    We develop the quantum field theory of electron-point magnetic monopole interactions and, more generally, dyon-dyon interactions, based on the original string-dependent ''nonlocal'' action of Dirac and Schwinger. We demonstrate that a viable nonperturbative quantum field theoretic formulation can be constructed that results in a string independent cross section for monopole-electron and dyon-dyon scattering. Such calculations can be done only by using nonperturbative approximations such as the eikonal approximation and not by some mutilation of lowest-order perturbation theory. (c) 2000 The American Physical Society.

  6. Dual quantum electrodynamics: Dyon-dyon and charge-monopole scattering in a high-energy approximation

    NASA Astrophysics Data System (ADS)

    Gamberg, Leonard; Milton, Kimball A.

    2000-04-01

    We develop the quantum field theory of electron-point magnetic monopole interactions and, more generally, dyon-dyon interactions, based on the original string-dependent ``nonlocal'' action of Dirac and Schwinger. We demonstrate that a viable nonperturbative quantum field theoretic formulation can be constructed that results in a string independent cross section for monopole-electron and dyon-dyon scattering. Such calculations can be done only by using nonperturbative approximations such as the eikonal approximation and not by some mutilation of lowest-order perturbation theory.

  7. Quantum 1/4 BPS dyons

    NASA Astrophysics Data System (ADS)

    Bak, Dongsu; Lee, Kimyeong; Yi, Piljin

    2000-02-01

    Classical properties of 1/4 Bogomol'nyi-Prasad-Sommerfield (BPS) dyons were previously well understood both in the field theory context and in the string theory context. Its quantum properties, however, have been more difficult to probe, although the elementary information of the supermultiplet structures is known from a perturbative construction. Recently, a low energy effective theory of monopoles was constructed and argued to contain these dyons as quantum bound states. In this paper, we find these dyonic bound states explicitly in the N=4 supersymmetric low energy effective theory. After identifying the correct angular momentum operators, we motivate an anti-self-dual ansatz for all BPS bound states. The wave functions are found explicitly, whose spin contents and degeneracies match exactly the expected results.

  8. On holography of Julia-Zee dyon

    NASA Astrophysics Data System (ADS)

    Allahbakhshi, Davood

    2011-09-01

    The holographic dual of self gravitating Julia-Zee dyon is discussed. It is shown that the dual field theory is generally a field theory with a vortex condensate. The vacuum expectation values of the dual operators, as functions of the sources in the field theory, are studied in a class of bulk solutions. In these solutions the sign of the vacuum expectation values of the dual operators change, by changing the sources in the model.

  9. Classical interactions of the instanton-dyons with antidyons

    NASA Astrophysics Data System (ADS)

    Larsen, Rasmus; Shuryak, Edward

    2016-06-01

    Instanton-dyons, also known as instanton-monopoles or instanton-quarks, are topological constituents of the instantons at nonzero temperature and nonzero expectation value of A4. While the interaction between instanton-dyons has been calculated to one-loop order by a number of authors, that for dyon-antidyon pairs remains unknown even at the classical level. In this work we are filling this gap, by solving the gradient flow equation on a 3d lattice. We start with two well separated objects. We find that, after initial rapid relaxation, the configurations follow "streamline" set of configurations, which is basically independent of the initial configurations used. In striking difference to instanton-antiinstanton streamlines, in this case it ends at a quasi-stationary configuration, with an abrupt drop to perturbative fields. We parameterize the action of the streamline configurations, which is to be used in future many-body calculations.

  10. Are preons dyons? Naturalness of three generations

    SciTech Connect

    Das, C. R.; Laperashvili, Larisa

    2006-08-01

    In the present paper a model of preons and their composites is constructed in the framework of the superstring-inspired flipped E{sub 6}xE-tilde{sub 6} gauge symmetry group which reveals a generalized dual symmetry. Here E{sub 6} and E-tilde{sub 6} are nondual and dual sectors of the theory with hyperelectric g and hypermagnetic g-tilde charges, respectively. We follow the old idea by J. Pati presuming that preons are dyons, which in our model are confined by hyper-magnetic strings--composite N=1 supersymmetric non-Abelian flux tubes created by the condensation of spreons near the Planck scale. Considering preons belonging to the 27-plet of E{sub 6}, we have investigated the breakdown of E{sub 6} (and E-tilde{sub 6}) near the Planck scale into the SU(6)x U(1) (and SU(6)-tildexU(1)-tilde) gauge group and shown that the six types of strings having fluxes {phi}{sub n}=n{phi}{sub 0} (n={+-}1,{+-}2,{+-}3) produce three (and only three) generations of composite quark-leptons and bosons. The model predicts the existence of the Family replicated gauge group [E{sub 6}]{sup 3} near the Planck scale. The runnings of the corresponding fine structure constants are investigated, and the critical coupling constants at the two phase transition points near the Planck scale are calculated. The model explains the hierarchies of masses in the standard model naturally. The compactification in a space-time with five dimensions and its influence on form-factors of composite objects are also briefly discussed.

  11. Dyons near the transition temperature in lattice QCD

    NASA Astrophysics Data System (ADS)

    Bornyakov, V. G.; Ilgenfritz, E.-M.; Martemyanov, B. V.; Müller-Preussker, M.

    2016-04-01

    We study the topological structure of QCD by cluster analysis. The fermionic topological charge density is constructed from low-lying modes of the overlap Dirac operator for three types of temporal boundary conditions for the fermion field. This provides the possibility of marking all three dyon constituents of Kraan-van Baal-Lee-Lu (KvBLL) calorons in the gluonic fields. The gluonic topological charge density appears in the overimproved gradient flow process stopped at the moment when it maximally matches the fermionic topological charge density. This corresponds to the smearing of gluonic fields up to the scale set by dyon size. The timelike Abelian monopoles and specific KvBLL pattern of the Polyakov line are correlated with topological clusters.

  12. MONOPOLES AND DYONS IN THE PURE EINSTEIN YANG MILLS THEORY

    SciTech Connect

    HOSOTANI,Y.; BJORAKER,J.

    1999-08-16

    In the pure Einstein-Yang-Mills theory in four dimensions there exist monopole and dyon solutions. The spectrum of the solutions is discrete in asymptotically flat or de Sitter space, whereas it is continuous in asymptotically anti-de Sitter space. The solutions are regular everywhere and specified with their mass, and non-Abelian electric and magnetic charges. In asymptotically anti-de Sitter space a class of monopole solutions have no node in non-Abelian magnetic fields, and are stable against spherically symmetric perturbations.

  13. Interaction of imaginary-charge-carrying dyon with particles

    SciTech Connect

    Nguyen Vien Tho

    2008-06-15

    By analytic continuation from a SU(2) gauge field solution, Wu and Yang [Phys. Rev. 13, 3233 (1976)] obtained a static and sourceless solution of gauge theory for the group SL(2,C) [also for SO(3,1)]. This field configuration resembles a dyon that carries an imaginary charge. We present here a scheme that allows us to derive consistently the equations describing the interaction between the Lorentz gauge field and particles in the classical limit. They look like Wong's equations in which gauge field components and color charges are complex. The complex charges and complex gauge field components can be understood as auxiliary concepts, while the equations of motion of particles in the outer space as well as kinematical and dynamical characteristics of the motion are real. The obtained equations are applied to investigate the case of particles in the mentioned dyon field configuration. The expressions of total energy and angular momentum, as integrals of motion of particles, are derived. The equations of motion allow planar motions, for which an analytic description of orbits is carried out.

  14. Interaction of imaginary-charge-carrying dyon with particles

    NASA Astrophysics Data System (ADS)

    Tho, Nguyen Vien

    2008-06-01

    By analytic continuation from a SU(2) gauge field solution, Wu and Yang [Phys. Rev. 13, 3233 (1976)] obtained a static and sourceless solution of gauge theory for the group SL(2,C) [also for SO(3,1)]. This field configuration resembles a dyon that carries an imaginary charge. We present here a scheme that allows us to derive consistently the equations describing the interaction between the Lorentz gauge field and particles in the classical limit. They look like Wong's equations in which gauge field components and color charges are complex. The complex charges and complex gauge field components can be understood as auxiliary concepts, while the equations of motion of particles in the outer space as well as kinematical and dynamical characteristics of the motion are real. The obtained equations are applied to investigate the case of particles in the mentioned dyon field configuration. The expressions of total energy and angular momentum, as integrals of motion of particles, are derived. The equations of motion allow planar motions, for which an analytic description of orbits is carried out.

  15. Script N = 8 dyon partition function and walls of marginal stability

    NASA Astrophysics Data System (ADS)

    Sen, Ashoke

    2008-07-01

    We construct the partition function of 1/8 BPS dyons in type II string theory on T6 from counting of microstates of a D1-D5 system in Taub-NUT space. Our analysis extends the earlier ones by Shih, Strominger and Yin and by Pioline by taking into account the walls of marginal stability on which a 1/8 BPS dyon can decay into a pair of half-BPS dyons. Across these walls the dyon spectrum changes discontinuously, and as a result the spectrum is not manifestly invariant under S-duality transformation of the charges. However the partition function is manifestly S-duality invariant and takes the same form in all domains of the moduli space separated by walls of marginal stability, the spectra in different domains being obtained by choosing different integration contours along which we carry out the Fourier transform of the partition function. The jump in the spectrum across a wall of marginal stability, calculated from the behaviour of the partition function at an appropriate pole, reproduces the expected wall crossing formula.

  16. Classical Geometrodynamics with Zorn Vector-Matrix Algebra for Gravito-Dyons

    NASA Astrophysics Data System (ADS)

    Chanyal, B. C.

    2015-08-01

    Describing the properties of split octonions and their connection with the 2 × 2 Zorn vector-matrix, we have reformulated generalized linear gravitational field equations in terms of split octonions in consistent and symmetrical manner. Starting with 2 × 2 Zorn vector-matrix algebra, we have written the generalized gravito-Heavisidian (GH) potential, field and current equations of gravito-dyons in terms of split octonions. Accordingly, we have obtained the gravitational analogues of generalized Dirac-Maxwell's and Proca-Maxwell's equations for linear gravito-Heavisidian (GH) field of gravito-dyons in the case of split octonionic representation. We have made an attempt to write the Poynting theorem in terms of split octonions which is analogous to the work-energy theorem of classical mechanics reproducing the continuity equation. Accordingly, we have described some fundamental laws of physics, i.e. the conservation of energy and momentum for the case of classical geometro-dynamics which exhibits linear gravitational theory of gravito-dyons.

  17. Light quarks in the screened dyon-antidyon Coulomb liquid model. II.

    NASA Astrophysics Data System (ADS)

    Liu, Yizhuang; Shuryak, Edward; Zahed, Ismail

    2015-10-01

    We discuss an extension of the dyon-antidyon liquid model that includes light quarks in the dense center symmetric phase. In this work, like in our previous one, we use the simplest color SU(2) group. We start with a single fermion flavor Nf=1 and explicitly map the model onto a three-dimensional quantum effective theory with a fermion that is only UV(1 ) symmetric. We use it to show, in the mean-field approximation, that in the dense center, the symmetric regime leads to the nonzero chiral condensate. We estimate its value and the σ ,η meson masses. We then extend our analysis to an arbitrary number of quark flavors Nf>1 and colors Nc>2 and show that in the dense plasma phase the spontaneous chiral symmetry breaking disappears when Nf/Nc≥2 . A reorganization of the ensemble into a gas of dyon-antidyon molecules restores chiral symmetry but may still preserve center symmetry in the linearized approximation.

  18. A remark on the asymptotic form of BPS multi-dyon solutions and their conserved charges

    NASA Astrophysics Data System (ADS)

    Constantinidis, C. P.; Ferreira, L. A.; Luchini, G.

    2015-12-01

    We evaluate the gauge invariant, dynamically conserved charges, recently obtained from the integral form of the Yang-Mills equations, for the BPS multi-dyon solutions of a Yang-Mills-Higgs theory associated to any compact semi-simple gauge group G. Those charges are shown to correspond to the eigenvalues of the next-to-leading term of the asymptotic form of the Higgs field at spatial infinity, and so coinciding with the usual topological charges of those solutions. Such results show that many of the topological charges considered in the literature are in fact dynamical charges, which conservation follows from the global properties of classical Yang-Mills theories encoded into their integral dynamical equations. The conservation of those charges can not be obtained from the differential form of Yang-Mills equations.

  19. Optical knots and contact geometry II. From Ranada dyons to transverse and cosmetic knots

    NASA Astrophysics Data System (ADS)

    Kholodenko, Arkady L.

    2016-08-01

    Some time ago Ranada (1989) obtained new nontrivial solutions of the Maxwellian gauge fields without sources. These were reinterpreted in Kholodenko (2015) [10] (part I) as particle-like (monopoles, dyons, etc.). They were obtained by the method of Abelian reduction of the non-Abelian Yang-Mills functional. The developed method uses instanton-type calculations normally employed for the non-Abelian gauge fields. By invoking the electric-magnetic duality it then becomes possible to replace all known charges/masses by the particle-like solutions of the source-free Abelian gauge fields. To employ these results in high energy physics, it is essential to extend Ranada's results by carefully analyzing and classifying all dynamically generated knotted/linked structures in gauge fields, including those discovered by Ranada. This task is completed in this work. The study is facilitated by the recent progress made in solving the Moffatt conjecture. Its essence is stated as follows: in steady incompressible Euler-type fluids the streamlines could have knots/links of all types. By employing the correspondence between the ideal hydrodynamics and electrodynamics discussed in part I and by superimposing it with the already mentioned method of Abelian reduction, it is demonstrated that in the absence of boundaries only the iterated torus knots and links could be dynamically generated. Obtained results allow to develop further particle-knot/link correspondence studied in Kholodenko (2015) [13].

  20. Extended Lagrangian formalisms for dyons and some applications to solid systems under external fields

    SciTech Connect

    Costa-Quintana, J. Lopez-Aguilar, F.

    2012-08-15

    We analyze the conditions of the electromagnetic potentials for systems with electric and magnetic charges and the Lagrangian theory with these potentials. The constructed Lagrangian function is valid for obtaining the field equations and the extended Lorentz force for dyonic charges for both relativistic particles in vacuum and non-relativistic entities in solids. In a second part, with the one-body Hamiltonian of independent particles in external fields, we explore some dual properties of the dyonic system under external fields. We analyze the possible diamagnetic (and 'diaelectric') response of magnetic monopoles under a weak and constant electromagnetic field and the theory of Landau levels in the case of magnetic charges under strong electromagnetic constant fields. - Highlights: Black-Right-Pointing-Pointer We study the Lagrangian formalism for magnetic charges. Black-Right-Pointing-Pointer We analyze the electromagnetic potentials for dyons. Black-Right-Pointing-Pointer We study two dual properties of solid systems with magnetic charges. Black-Right-Pointing-Pointer A quantum study of solids with monopoles under electromagnetic constant fields.

  1. Magnetic monopoles and dyons revisited: a useful contribution to the study of classical mechanics

    NASA Astrophysics Data System (ADS)

    dos Santos, Renato P.

    2015-05-01

    Graduate-level physics curricula in many countries around the world, as well as senior-level undergraduate ones in some major institutions, include classical mechanics courses, mostly based on Goldstein’s textbook masterpiece. During the discussion of central force motion, however, the Kepler problem is virtually the only serious application presented. In this paper, we present another problem that is also soluble, namely the interaction of Schwinger’s dual-charged (dyon) particles. While the electromagnetic interaction of magnetic monopoles and electric charges was studied in detail some 40 years ago, we consider that a pedagogical discussion of it from an essentially classical mechanics point of view is a useful contribution for students. Following a path that generalizes Kepler’s problem and Rutherford scattering, we show that they exhibit remarkable properties such as stable non-planar orbits, as well as rainbow and glory scattering, which are not present in the ordinary scattering of two singly charged particles. Moreover, it can be extended further to the relativistic case and to a semi-classical quantization, which can also be included in the class discussion.

  2. Foldy-Wouthuysen transformation for a Dirac-Pauli dyon and the Thomas-Bargmann-Michel-Telegdi equation

    NASA Astrophysics Data System (ADS)

    Chen, Tsung-Wei; Chiou, Dah-Wei

    2010-07-01

    The classical dynamics for a charged point particle with intrinsic spin is governed by a relativistic Hamiltonian for the orbital motion and by the Thomas-Bargmann-Michel-Telegdi equation for the precession of the spin. It is natural to ask whether the classical Hamiltonian (with both the orbital and spin parts) is consistent with that in the relativistic quantum theory for a spin-1/2 charged particle, which is described by the Dirac equation. In the low-energy limit, up to terms of the seventh order in 1/Eg (Eg=2mc2 and m is the particle mass), we investigate the Foldy-Wouthuysen (FW) transformation of the Dirac Hamiltonian in the presence of homogeneous and static electromagnetic fields and show that it is indeed in agreement with the classical Hamiltonian with the gyromagnetic ratio being equal to 2. Through electromagnetic duality, this result can be generalized for a spin-1/2 dyon, which has both electric and magnetic charges and thus possesses both intrinsic electric and magnetic dipole moments. Furthermore, the relativistic quantum theory for a spin-1/2 dyon with arbitrary values of the gyromagnetic and gyroelectric ratios can be described by the Dirac-Pauli equation, which is the Dirac equation with augmentation for the anomalous electric and anomalous magnetic dipole moments. The FW transformation of the Dirac-Pauli Hamiltonian is shown, up to the seventh-order again, to be in accord with the classical Hamiltonian as well.

  3. Existence of topological hairy dyons and dyonic black holes in anti-de Sitter 𝔰𝔲(N) Einstein-Yang-Mills theory

    NASA Astrophysics Data System (ADS)

    Baxter, J. Erik

    2016-02-01

    We investigate dyonic black hole and dyon solutions of four-dimensional 𝔰𝔲(N) Einstein-Yang-Mills theory with a negative cosmological constant. We derive a set of field equations in this case, and prove the existence of non-trivial solutions to these equations for any integer N, with 2N - 2 gauge degrees of freedom. We do this by showing that solutions exist locally at infinity, and at the event horizon for black holes and the origin for solitons. We then prove that we can patch these solutions together regularly into global solutions that can be integrated arbitrarily far into the asymptotic regime. Our main result is to show that dyonic solutions exist in open sets in the parameter space, and hence that we can find non-trivial dyonic solutions in a number of regimes whose magnetic gauge fields have no zeros, which is likely important to the stability of the solutions.

  4. Chasing the cuprates with dilatonic dyons

    NASA Astrophysics Data System (ADS)

    Amoretti, Andrea; Baggioli, Matteo; Magnoli, Nicodemo; Musso, Daniele

    2016-06-01

    Magnetic field and momentum dissipation are key ingredients in describing condensed matter systems. We include them in gauge/gravity and systematically explore the bottom-up panorama of holographic IR effective field theories based on bulk EinsteinMaxwell Lagrangians plus scalars. The class of solutions here examined appears insufficient to capture the phenomenology of charge transport in the cuprates. We analyze in particular the temperature scaling of the resistivity and of the Hall angle. Keeping an open attitude, we illustrate weak and strong points of the approach.

  5. On the stability of dyons and dyonic black holes in Einstein-Yang-Mills theory

    NASA Astrophysics Data System (ADS)

    Nolan, Brien C.; Winstanley, Elizabeth

    2016-02-01

    We investigate the stability of four-dimensional dyonic soliton and black hole solutions of {su}(2) Einstein-Yang-Mills theory in anti-de Sitter space. We prove that, in a neighbourhood of the embedded trivial (Schwarzschild-)anti-de Sitter solution, there exist non-trivial dyonic soliton and black hole solutions of the field equations which are stable under linear, spherically symmetric, perturbations of the metric and non-Abelian gauge field.

  6. Optical knots and contact geometry I. From Arnol'd inequality to Ranada's dyons

    NASA Astrophysics Data System (ADS)

    Kholodenko, Arkady L.

    2016-06-01

    Recently there had been a great deal of activity associated with various schemes of designing both analytic and experimental methods describing knotted structures in electrodynamics and in hydrodynamics. The majority of works in electrodynamics were inspired by the influential paper by Ranada (Lett Math Phys 18:97-106, 1989) and its subsequent refinements. In this work and in its companion we analyze Ranada's results using methods of contact geometry and topology. Not only our analysis allows us to reproduce his major results but in addition, it provides opportunities for considerably extending the catalog of the known/obtained knot types. In addition, it allows to reinterpret both the electric and magnetic charges purely geometrically thus opening the possibility of treatment of masses and charges in Yang-Mills and gravitational fields purely geometrically.

  7. Dyons and dyonic black holes in su (N ) Einstein-Yang-Mills theory in anti-de Sitter spacetime

    NASA Astrophysics Data System (ADS)

    Shepherd, Ben L.; Winstanley, Elizabeth

    2016-03-01

    We present new spherically symmetric, dyonic soliton and black hole solutions of the su (N ) Einstein-Yang-Mills equations in four-dimensional asymptotically anti-de Sitter spacetime. The gauge field has nontrivial electric and magnetic components and is described by N -1 magnetic gauge field functions and N -1 electric gauge field functions. We explore the phase space of solutions in detail for su (2 ) and su (3 ) gauge groups. Combinations of the electric gauge field functions are monotonic and have no zeros; in general the magnetic gauge field functions may have zeros. The phase space of solutions is extremely rich, and we find solutions in which the magnetic gauge field functions have more than fifty zeros. Of particular interest are solutions for which the magnetic gauge field functions have no zeros, which exist when the negative cosmological constant has sufficiently large magnitude. We conjecture that at least some of these nodeless solutions may be stable under linear, spherically symmetric, perturbations.

  8. Hawking radiation of dyon particles from the Einstein Maxwell-Dilaton Axion black hole via covariant anomaly

    NASA Astrophysics Data System (ADS)

    Zeng, Xiao-Xiong; Liu, Xiong-Wei; Yang, Shu-Zheng

    2008-12-01

    Hawking radiation of particles with electric and magnetic charges from the Einstein Maxwell-Dilaton Axion black hole is derived via the anomaly cancellation method, initiated by Robinson and Wilczek and elaborated by Banerjee and Kulkarni recently. We reconstruct the electromagnetic field tensor to redefine the gauge potential and equivalent charge corresponding to the source with electric and magnetic charges. We only adopt the covariant gauge and gravitational anomalies to discuss the near-horizon quantum anomaly in the dragging coordinate frame. Our result shows that Hawking radiation in this case also can be reproduced from the viewpoint of anomaly.

  9. Excitation of simple atoms by slow magnetic monopoles

    SciTech Connect

    Kroll, N.M.; Parke, S.J.; Ganapathi, V.; Drell, S.D.

    1984-01-01

    We present a theory of excitation of simple atoms by slow moving massive monopoles. Previously presented results for a monopole of Dirac strength on hydrogen and helium are reviewed. The hydrogen theory is extended to include arbitrary integral multiples of the Dirac pole strength. The excitation of helium by double strength poles and by dyons is also discussed. It is concluded that a helium proportional counter is a reliable and effective detector for monopoles of arbitrary strength, and for negatively charged dyons.

  10. Extremal dyonic black holes in D=4 Gauss-Bonnet gravity

    NASA Astrophysics Data System (ADS)

    Chen, Chiang-Mei; Gal'Tsov, Dmitri V.; Orlov, Dmitry G.

    2008-11-01

    We investigate extremal dyon black holes in the Einstein-Maxwell-dilaton theory with higher curvature corrections in the form of the Gauss-Bonnet density coupled to the dilaton. In the same theory without the Gauss-Bonnet term the extremal dyon solutions exist only for discrete values of the dilaton coupling constant a. We show that the Gauss-Bonnet term acts as a dyon hair tonic enlarging the allowed values of a to continuous domains in the plane (a,qm) where qm is the magnetic charge. In the limit of the vanishing curvature coupling (a large magnetic charge) the dyon solutions obtained tend to the Reissner-Nordström solution but not to the extremal dyons of the Einstein-Maxwell-dilaton theory. Both solutions have the same dependence of the horizon radius in terms of charges. The entropy of new dyonic black holes interpolates between the Bekenstein-Hawking value in the limit of the large magnetic charge (equivalent to the vanishing Gauss-Bonnet coupling) and twice this value for the vanishing magnetic charge. Although an expression for the entropy can be obtained analytically using purely local near-horizon solutions, its interpretation as the black hole entropy is legitimate only once the global black hole solution is known to exist, and we obtain numerically the corresponding conditions on the parameters. Thus, a purely local analysis is insufficient to fully understand the entropy of the curvature-corrected black holes. We also find dyon solutions which are not asymptotically flat, but approach the linear dilaton background at infinity. They describe magnetic black holes on the electric linear dilaton background.

  11. Extremal dyonic black holes in D=4 Gauss-Bonnet gravity

    SciTech Connect

    Chen, C.-M.; Gal'tsov, Dmitri V.; Orlov, Dmitry G.

    2008-11-15

    We investigate extremal dyon black holes in the Einstein-Maxwell-dilaton theory with higher curvature corrections in the form of the Gauss-Bonnet density coupled to the dilaton. In the same theory without the Gauss-Bonnet term the extremal dyon solutions exist only for discrete values of the dilaton coupling constant a. We show that the Gauss-Bonnet term acts as a dyon hair tonic enlarging the allowed values of a to continuous domains in the plane (a,q{sub m}) where q{sub m} is the magnetic charge. In the limit of the vanishing curvature coupling (a large magnetic charge) the dyon solutions obtained tend to the Reissner-Nordstroem solution but not to the extremal dyons of the Einstein-Maxwell-dilaton theory. Both solutions have the same dependence of the horizon radius in terms of charges. The entropy of new dyonic black holes interpolates between the Bekenstein-Hawking value in the limit of the large magnetic charge (equivalent to the vanishing Gauss-Bonnet coupling) and twice this value for the vanishing magnetic charge. Although an expression for the entropy can be obtained analytically using purely local near-horizon solutions, its interpretation as the black hole entropy is legitimate only once the global black hole solution is known to exist, and we obtain numerically the corresponding conditions on the parameters. Thus, a purely local analysis is insufficient to fully understand the entropy of the curvature-corrected black holes. We also find dyon solutions which are not asymptotically flat, but approach the linear dilaton background at infinity. They describe magnetic black holes on the electric linear dilaton background.

  12. Meta-stable Supersymmetry Breaking in an N = 1 Perturbed Seiberg-Witten Theory

    SciTech Connect

    Sasaki, Shin; Arai, Masato; Montonen, Claus; Okada, Nobuchika

    2008-11-23

    In this contribution, we discuss the possibility of meta-stable supersymmetry (SUSY) breaking vacua in a perturbed Seiberg-Witten theory with Fayet-Iliopoulos (FI) term. We found meta-stable SUSY breaking vacua at the degenerated dyon and monopole singular points in the moduli space at the nonperturbative level.

  13. Dyonic String-Like Solution in a Non-Abelian Gauge Theory with Two Potentials

    NASA Astrophysics Data System (ADS)

    Tripathi, Buddhi Vallabh; Nandan, Hemwati; Purohit, K. D.

    2016-04-01

    Axially symmetric dyon solutions of a non-Abelian gauge theory model with two potentials are sought. While seeking axially symmetric (flux tube like solutions) for the model, we stumbled upon an exact solution which represents an infinite string-like dyonic configuration with cylindrical symmetry.

  14. Strongly coupled plasma with electric and magnetic charges

    SciTech Connect

    Liao Jinfeng; Shuryak, Edward

    2007-05-15

    A number of theoretical and lattice results lead us to believe that quark-gluon plasma not too far from T{sub c} contains not only electrically charged quasiparticles - quarks and gluons - but magnetically charged ones--monopoles and dyons--as well. Although binary systems such as charge-monopole and charge-dyon were considered in detail before in both classical and quantum settings, this is the first study of coexisting electric and magnetic particles in a many-body context. We perform a molecular dynamics study of strongly coupled plasmas with {approx}1000 particles and differing fractions of magnetic charge. Correlation functions and Kubo formulas lead to transport properties such as the diffusion constant, the shear viscosity, and electric conductivity: We compare the first two with empirical data from RHIC experiments as well as with results from anti-de-Sitter space/conformal field theory correspondence. We also study a number of collective excitations in these systems.

  15. QCD with many fermions and QCD topology

    NASA Astrophysics Data System (ADS)

    Shuryak, Edward

    2013-04-01

    Major nonperturbative phenomena in QCD - confinement and chiral symmetry breaking - are known to be related with certain topological objects. Recent lattice advances into the domain of many Nf = O(10) fermion flavors have shown that both phase transitions had shifted in this case to much stronger coupling. We discuss confinement in terms of monopole Bose condensation, and discuss how it is affected by fermions "riding" on the monopoles, ending with the Nf dependence of the critical line. Chiral symmetry breaking is discussed in terms of the (anti)selfdual dyons, the instanton constituents. The fermionic zero modes of those have a different meaning and lead to strong interaction between dyons and antidyons. We report some qualitative consequences of this theory and also some information about our first direct numerical study of the dyonic ensemble, in respect to both chiral symmetry breaking and confinement (via back reaction to the holonomy potential).

  16. The price of an electroweak monopole

    NASA Astrophysics Data System (ADS)

    Ellis, John; Mavromatos, Nick E.; You, Tevong

    2016-05-01

    In a recent paper, Cho, Kim and Yoon (CKY) have proposed a version of the SU (2) × U (1) Standard Model with finite-energy monopole and dyon solutions. The CKY model postulates that the effective U(1) gauge coupling →∞ very rapidly as the Englert-Brout-Higgs vacuum expectation value →0, but in a way that is incompatible with LHC measurements of the Higgs boson H → γγ decay rate. We construct generalisations of the CKY model that are compatible with the H → γγ constraint, and calculate the corresponding values of the monopole and dyon masses. We find that the monopole mass could be < 5.5 TeV, so that it could be pair-produced at the LHC and accessible to the MoEDAL experiment.

  17. Two applications of axion electrodynamics

    NASA Technical Reports Server (NTRS)

    Wilczek, Frank

    1987-01-01

    The equations of axion electrodynamics are studied. Variations in the axion field can give rise to peculiar distributions of charge and current. These effects provide a simple understanding of the fractional electric charge on dyons and of some recently discovered oddities in the electrodynamics of antiphase boundaries in PbTe. Some speculations regarding the possible occurrence of related phenomena in other solids are presented.

  18. Quadratic Algebra Approach to the Dirac Equation with Spin and Pseudospin Symmetry for the 4D Harmonic Oscillator and U(1) Monopole

    NASA Astrophysics Data System (ADS)

    Aghaei, S.; Chenaghlou, A.

    2015-01-01

    In this paper, we study the Dirac equation with spin and pseudospin symmetry by the quadratic algebra approach for the 4-dimensional harmonic oscillator. By realization of the quadratic algebras in the deformed oscillator algebra, we obtain the relativistic energy spectrum. Also, by regarding the generalized Kustaanheimo-Stiefel transformation, we obtain the relativistic energy spectrum for the charge-dyon system with the U(1) monopole.

  19. Electrically charged finite energy solutions of an SO(5) and an SU(3) Higgs-Chern-Simons-Yang-Mills-Higgs system in 3+1 dimensions

    NASA Astrophysics Data System (ADS)

    Navarro-Lérida, Francisco; Tchrakian, D. H.

    2015-05-01

    We study spherically symmetric finite energy solutions of two Higgs-Chern-Simons-Yang-Mills-Higgs (HCS-YMH) models in 3+1 dimensions, one with gauge group SO(5) and the other with SU(3). The Chern-Simons (CS) densities are defined in terms of both the Yang-Mills (YM) and Higgs fields and the choice of the two gauge groups is made so that they do not vanish. The solutions of the SO(5) model carry only electric charge and zero magnetic charge, while the solutions of the SU(3) model are dyons carrying both electric and magnetic charges like the Julia-Zee (JZ) dyon. Unlike the latter, however, the electric charge in both models receives an important contribution from the CS dynamics. We pay special attention to the relation between the energies and charges of these solutions. In contrast with the electrically charged JZ dyon of the Yang-Mills-Higgs (YMH) system, whose mass is larger than that of the electrically neutral (magnetic monopole) solutions, the masses of the electrically charged solutions of our HCS-YMH models can be smaller than their electrically neutral counterparts in some parts of the parameter space. To establish this is the main task of this work, which is performed by constructing the HCS-YMH solutions numerically. In the case of the SU(3) HCS-YMH, we have considered the question of angular momentum and it turns out that it vanishes.

  20. A Chern-Simons-Yang-Mills-Higgs system in 3+1 dimensions

    NASA Astrophysics Data System (ADS)

    Navarro-Lérida, Francisco; Radu, Eugen; Tchrakian, D. H.

    2014-10-01

    We study spherically symmetric solutions of an SO(5) Chern-Simons-Yang-Mills-Higgs system in 3+1 dimensions. The Chern-Simons densities are defined in terms of both Yang-Mills fields and a five-component isomultiplet Higgs. The SO(3) × SO(2) solutions are analyzed in a systematic way, by employing numerical methods. These finite energy configurations possess both electric and magnetic global charges, differing radically, however, from Julia-Zee dyons. When two or more of these Chern-Simons densities are present in the Lagrangian, solutions with vanishing electric charge but nonvanishing electrostatic potential may exist.

  1. Kepler unbound: Some elegant curiosities of classical mechanics

    NASA Astrophysics Data System (ADS)

    MacKay, Niall J.; Salour, Sam

    2015-01-01

    We explain two exotic systems of classical mechanics: the McIntosh-Cisneros-Zwanziger ("MICZ") Kepler system, of motion of a charged particle in the presence of a modified dyon; and Gibbons and Manton's description of the slow motion of well-separated solitonic ("BPS") monopoles using Taub-NUT space. Each system is characterized by the conservation of a Laplace-Runge-Lenz vector, and we use elementary vector techniques to show that each obeys a subtly different variation on Kepler's three laws for the Newton-Coulomb two-body problem, including a new modified Kepler third law for BPS monopoles.

  2. Heterotic enhançon

    NASA Astrophysics Data System (ADS)

    Natsuume, Makoto

    2002-04-01

    The enhançon mechanism is studied in heterotic string theory. We consider the NL=0 winding strings with momentum (NS1-W*) and the Kaluza-Klein dyons (KK5-NS5*). The NS1-W* and KK5-NS5* systems are dualized to the D4-D0* and D6-D2* systems, respectively, under the d=6 heterotic-type-IIA S duality. The heterotic form has a number of advantages over the type IIA form. We study these backgrounds and obtain the enhançon radii by brane probe analysis. The results are consistent with S duality.

  3. Partition function of N={2}^{ast } SYM on a large four-sphere

    NASA Astrophysics Data System (ADS)

    Hollowood, Timothy J.; Kumar, S. Prem

    2015-12-01

    We examine the partition function of N={2}^{ast } supersymmetric SU( N) Yang-Mills theory on the four-sphere in the large radius limit. We point out that the large radius partition function, at fixed N, is computed by saddle-points lying on walls of marginal stability on the Coulomb branch of the theory on {R}^4 . For N an even (odd) integer and θ YM = 0( π), these include a point of maximal degeneration of the Donagi-Witten curve to a torus where BPS dyons with electric charge [N/2] become massless. We argue that the dyon singularity is the lone saddle-point in the SU(2) theory, while for SU( N) with N > 2, we characterize potentially competing saddle-points by obtaining the relations between the Seiberg-Witten periods at such points. Using Nekrasov's instanton partition function, we solve for the maximally degenerate saddle-point and obtain its free energy as a function of g YM and N, and show that the results are "large- N exact". In the large- N theory our results provide analytical expressions for the periods/eigenvalues at the maximally degenerate saddle-point, precisely matching previously known formulae following from the correspondence between N={2}^{ast } theory and the elliptic Calogero-Moser integrable model. The maximally singular point ceases to be a saddle-point of the partition function above a critical value of the coupling, in agreement with the recent findings of Russo and Zarembo.

  4. Cho decomposition of electrically charged one-half monopole

    SciTech Connect

    Ng, Ban-Loong; Teh, Rosy; Wong, Khai-Ming

    2014-03-05

    Recently we have carried out some work on the Cho decomposition of the electrically neutral, finite energy one-half monopole solution of the SU(2) Yang-Mills-Higgs field theory. In this paper, we performed the decomposition of the electrically charged solution using the same numerical procedure. The gauge potential of the one-half dyon solution is decomposed into Abelian and non-Abelian components. The semi-infinite string singularity in the gauge potential is a contribution of the Higgs field and hence topological in nature. The string singularity cannot be cancelled by the non-Abelian components of the gauge potential. However, the string singularity is integrable and the energy of the solution is finite. By decomposing the magnetic fields and covariant derivatives of the Higgs field into three isospin space directions, we are able to provide conclusive evidence that the constructed one-half dyon is certainly a non-BPS solution even in the limit of vanishing Higgs self-coupling constant and electric charge. Furthermore, we found that the time component of gauge function is parallel to the Higgs field in isospace only at large distances, elsewhere they are non-parallel.

  5. S-duality and helicity amplitudes

    NASA Astrophysics Data System (ADS)

    Colwell, Kitran; Terning, John

    2016-03-01

    We examine interacting Abelian theories at low energies and show that holomorphically normalized photon helicity amplitudes transform into dual amplitudes under SL(2, {Z} ) as modular forms with weights that depend on the number of positive and negative helicity photons and on the number of internal photon lines. Moreover, canonically normalized helicity amplitudes transform by a phase, so that even though the amplitudes are not duality invariant, their squares are duality invariant. We explicitly verify the duality transformation at one loop by comparing the amplitudes in the case of an electron and the dyon that is its SL(2, {Z} ) image, and extend the invariance of squared amplitudes order by order in perturbation theory. We demonstrate that S-duality is a property of all low-energy effective Abelian theories with electric and/or magnetic charges and see how the duality generically breaks down at high energies.

  6. Dirac's Dream-the Search for the Magnetic Monopole

    NASA Astrophysics Data System (ADS)

    Pinfold, James L.

    2010-11-01

    I first quickly summarize the history of the Magnetic Monopole leading to the quantum theory of magnetic charge that started with a 1931 paper by Paul Dirac who showed that the existence of magnetic monopoles was consistent with Maxwell's equations only if electric charges are quantized. Next I will briefly review the status of monopole searches. Last, but not least I discuss in more detail the MoEDAL experiment-the latest accelerator experiment designed to search for direct production of magnetic monopoles or dyons (particles with electric and magnetic charge) and other highly ionizing particles-such as heavy (pseudo-) stable particles with conventional electric charge-at the LHC. The MoEDAL experiment employs nuclear track-etch detectors deployed in the VELO vertex region of the LHCb experiment.

  7. Multicenter McIntosh-Cisneros-Zwanziger-Kepler system, supersymmetry and integrability

    NASA Astrophysics Data System (ADS)

    Krivonos, Sergey; Nersessian, Armen; Ohanyan, Vadim

    2007-04-01

    We propose the general scheme of incorporation of the Dirac monopoles into mechanical systems on the three-dimensional conformal flat space. We found that any system (without monopoles) admitting the separation of variables in the elliptic or parabolic coordinates can be extended to the integrable system with the Dirac monopoles located at the foci of the corresponding coordinate systems. Particular cases of this class of system are the two-center MICZ-Kepler system in the Euclidean space, the limiting case when one of the background dyons is located at the infinity as well as the model of particle in parabolic quantum dot in the presence of parallel constant uniform electric and magnetic fields.

  8. Multicenter McIntosh-Cisneros-Zwanziger-Kepler system, supersymmetry and integrability

    SciTech Connect

    Krivonos, Sergey; Nersessian, Armen; Ohanyan, Vadim

    2007-04-15

    We propose the general scheme of incorporation of the Dirac monopoles into mechanical systems on the three-dimensional conformal flat space. We found that any system (without monopoles) admitting the separation of variables in the elliptic or parabolic coordinates can be extended to the integrable system with the Dirac monopoles located at the foci of the corresponding coordinate systems. Particular cases of this class of system are the two-center MICZ-Kepler system in the Euclidean space, the limiting case when one of the background dyons is located at the infinity as well as the model of particle in parabolic quantum dot in the presence of parallel constant uniform electric and magnetic fields.

  9. The Theory of High Energy Collision Processes - Final Report DOE/ER/40158-1

    SciTech Connect

    Wu, Tai, T.

    2011-09-15

    In 1984, DOE awarded Harvard University a new Grant DE-FG02-84ER40158 to continue their support of Tai Tsun Wu as Principal Investigator of research on the theory of high energy collision processes. This Grant was renewed and remained active continuously from June 1, 1984 through November 30, 2007. Topics of interest during the 23-year duration of this Grant include: the theory and phenomenology of collision and production processes at ever higher energies; helicity methods of QED and QCD; neutrino oscillations and masses; Yang-Mills gauge theory; Beamstrahlung; Fermi pseudopotentials; magnetic monopoles and dyons; cosmology; classical confinement; mass relations; Bose-Einstein condensation; and large-momentum-transfer scattering processes. This Final Report describes the research carried out on Grant DE-FG02-84ER40158 for the period June 1, 1984 through November 30, 2007. Two books resulted from this project and a total of 125 publications.

  10. Seiberg-Witten and 'Polyakov-like' Magnetic Bion Confinements are Continuously Connected

    SciTech Connect

    Poppitz, Erich; Unsal, Mithat; /SLAC /Stanford U., Phys. Dept.

    2012-06-01

    We study four-dimensional N = 2 supersymmetric pure-gauge (Seiberg-Witten) theory and its N = 1 mass perturbation by using compactification on S{sup 1} x R{sup 3}. It is well known that on R{sup 4} (or at large S{sup 1} size L) the perturbed theory realizes confinement through monopole or dyon condensation. At small S{sup 1}, we demonstrate that confinement is induced by a generalization of Polyakov's three-dimensional instanton mechanism to a locally four-dimensional theory - the magnetic bion mechanism - which also applies to a large class of nonsupersymmetric theories. Using a large- vs. small-L Poisson duality, we show that the two mechanisms of confinement, previously thought to be distinct, are in fact continuously connected.

  11. Heterotic string on the CHL orbifold of K3

    NASA Astrophysics Data System (ADS)

    Datta, Shouvik; David, Justin R.; Lüst, Dieter

    2016-02-01

    We study {N}=2 compactifications of heterotic string theory on the CHL orbifold (K3× {T}^2)/{{Z}}_N with N = 2, 3, 5, 7. {{Z}}_N acts as an automorphism on K3 together with a shift of 1/ N along one of the circles of T 2. These compactifications generalize the example of the heterotic string on K3 × T 2 studied in the context of dualities in {N}=2 string theories. We evaluate the new supersymmetric index for these theories and show that their expansion can be written in terms of the McKay-Thompson series associated with the {{Z}}_N automorphism embedded in the Mathieu group M 24. We then evaluate the difference in one-loop threshold corrections to the non-Abelian gauge couplings with Wilson lines and show that their moduli dependence is captured by Siegel modular forms related to dyon partition functions of {N}=4 string theories.

  12. Dyonic non-Abelian vortex strings in supersymmetric and non-supersymmetric theories — tensions and higher derivative corrections

    NASA Astrophysics Data System (ADS)

    Eto, Minoru; Murakami, Yoshihide

    2015-03-01

    Dyonic non-Abelian local/semi-global vortex strings are studied in detail in supersymmetric/non-supersymmetric Yang-Mills-Higgs theories. While the BPS tension formula is known to be the same as that for the BPS dyonic instanton, we find that the non-BPS tension formula is approximated very well by the well-known tension formula of the BPS dyon. We show that this mysterious tension formula for the dyonic non-BPS vortex stings can be understood from the perspective of a low energy effective field theory. Furthermore, we propose an efficient method to obtain an effective theory of a single vortex string, which includes not only lower derivative terms but also all order derivative corrections by making use of the tension formula. We also find a novel dyonic vortex string whose internal orientation vectors rotate in time and spiral along the string axis.

  13. Dirac's Dream - the Search for the Magnetic Monopole

    SciTech Connect

    Pinfold, James L.

    2010-11-24

    I first quickly summarize the history of the Magnetic Monopole leading to the quantum theory of magnetic charge that started with a 1931 paper by Paul Dirac who showed that the existence of magnetic monopoles was consistent with Maxwell's equations only if electric charges are quantized. Next I will briefly review the status of monopole searches. Last, but not least I discuss in more detail the MoEDAL experiment--the latest accelerator experiment designed to search for direct production of magnetic monopoles or dyons (particles with electric and magnetic charge) and other highly ionizing particles - such as heavy (pseudo-) stable particles with conventional electric charge - at the LHC. The MoEDAL experiment employs nuclear track-etch detectors deployed in the VELO vertex region of the LHCb experiment.

  14. Differential cross sections and escape plots for low-energy solitonic SU(2) BPS magnetic monopole dynamics

    NASA Astrophysics Data System (ADS)

    Temple-Raston, M.; Alexander, D.

    1993-05-01

    We compute the low-energy classical differential scattering cross section for solitonic BPS SU(2) magnetic monopoles using the geodesic approximation to the actual dynamics and 32K virtual parallel processors on a CM2. We compare the classical solitonic differential cross section to the low-energy quantum BPS SU(2) magnetic monopole differential cross section obtained by Schroers. Our numerical experiments suggest that the classical solitonic BPS magnetic monopole differential cross section approximates well the quantum BPS magnetic monopole differential cross section. In particular, the expected quantum interference of identical bosons at scattering angle θ = {π}/{2} (centre-of-mass frame) is not observed numerically, and indeed is contradicted. We argue that the lack of singularities in the two-body configuration space, related to the solitonic qualities of the BPS SU(2) magnetic monopole, is responsible for the agreement observed between the classical solitonic and the quantum mechanical cross sections. We also study the scattering and bounded classical motions of BPS SU(2) dyons and their global structure in phase space by constructing "escape plots". The escape plots contain a surprising amount of structure. The escape plots suggest that the classical dynamics of two BPS SU(2) magnetic monopoles is non-integrable and that there are closed and bounded two-monopole motions with isolated energies.

  15. The shape of nonabelian D-branes

    NASA Astrophysics Data System (ADS)

    Hashimoto, Koji

    2004-04-01

    We evaluate bulk distribution of energies, pressures and various D-brane/F-string charges generated by nontrivial matrix configurations in nonabelian D-brane effective field theories, using supergravity source density formulas derived originally in Matrix theory. Off-diagonal elements of worldvolume nonabelian fields, especially transverse scalar fields, induce various interesting bulk structures exhibiting the shape of branes. First, we study the energy distribution of string-brane networks generated in the bulk by the Yang-Mills monopoles and the 1/4 BPS dyons, and confirm force balance of them. An application to the Yang-Mills description of recombination of intersecting D-branes gives results indicating presence of the tachyon matter. Second, we analyse the shape of fuzzy D-branes given by nonabelian scalar fields which are mutually noncommutative. We employ fuzzy S2, fuzzy S4 and fuzzy cylinder/supertube as matrix configurations of N D0-branes representing higher dimensional noncommutative D-branes. We find that in the continuum (large-N) limit the D-brane charge distributions become in the expected shape of a sphere or a cylinder with an infinitesimal thickness. However, the distributions found for finite N are difficult to interpret, which leaves a puzzle for a possible dual description in terms of higher dimensional D-branes. A resolution is provided with use of an ordering ambiguity in the charge density formulas.

  16. Marginal stability and the metamorphosis of Bogomol'nyi-Prasad-Sommerfield states

    SciTech Connect

    Ritz, Adam; Shifman, Mikhail; Vainshtein, Arkady; Voloshin, Mikhail

    2001-03-15

    We discuss the restructuring of the BPS spectrum which occurs on certain submanifolds of the moduli or parameter space -- the curves of the marginal stability (CMS) -- using quasiclassical methods. We argue that in general a ''composite'' BPS soliton swells in coordinate space as one approaches the CMS and that, as a bound state of two ''primary'' solitons, its dynamics in this region is determined by nonrelativistic supersymmetric quantum mechanics. Near the CMS the bound state has a wave function which is highly spread out. Precisely on the CMS the bound state level reaches the continuum, the composite state delocalizes in coordinate space, and restructuring of the spectrum can occur. We present a detailed analysis of this behavior in a two-dimensional N=2 Wess-Zumino model with two chiral fields, and then discuss how it arises in the context of ''composite'' dyons near weak coupling CMS curves in N=2 supersymmetric gauge theories. We also consider cases where some states become massless on the CMS.

  17. Angular momentum, g-value, and magnetic flux of gyration states

    SciTech Connect

    Arunasalam, V.

    1991-10-01

    Two of the world's leading (Nobel laureate) physicists disagree on the definition of the orbital angular momentum L of the Landau gyration states of a spinless charged particle in a uniform external magnetic field B = B i{sub Z}. According to Richard P. Feynman (and also Frank Wilczek) L = (rx{mu}v) = rx(p - qA/c), while Felix Bloch (and also Kerson Huang) defines it as L = rxp. We show here that Bloch's definition is the correct one since it satisfies the necessary and sufficient condition LxL = i{Dirac h} L, while Feynman's definition does not. However, as a consequence of the quantized Aharonov-Bohm magnetic flux, this canonical orbital angular momentum (surprisingly enough) takes half-odd-integral values with a zero-point gyration states of L{sub Z} = {Dirac h}/2. Further, since the diamagnetic and the paramagnetic contributions to the magnetic moment are interdependent, the g-value of these gyration states is two and not one, again a surprising result for a spinless case. The differences between the gauge invariance in classical and quantum mechanics, Onsager's suggestion that the flux quantization might be an intrinsic property of the electromagnetic field-charged particle interaction, the possibility that the experimentally measured fundamental unit of the flux quantum need not necessarily imply the existence of electron pairing'' of the Bardeen-Cooper-Schrieffer superconductivity theory, and the relationship to the Dirac's angular momentum quantization condition for the magnetic monopole-charged particle composites (i.e. Schwinger's dyons), are also briefly examined from a pedestrian viewpoint.

  18. Academic hospital staff compliance with a fecal immunochemical test-based colorectal cancer screening program

    PubMed Central

    Vlachonikolou, Georgia; Gkolfakis, Paraskevas; Sioulas, Athanasios D; Papanikolaou, Ioannis S; Melissaratou, Anastasia; Moustafa, Giannis-Aimant; Xanthopoulou, Eleni; Tsilimidos, Gerasimos; Tsironi, Ioanna; Filippidis, Paraskevas; Malli, Chrysoula; Dimitriadis, George D; Triantafyllou, Konstantinos

    2016-01-01

    AIM To measure the compliance of an Academic Hospital staff with a colorectal cancer (CRC) screening program using fecal immunochemical test (FIT). METHODS All employees of “Attikon” University General Hospital aged over 50 years were thoroughly informed by a team of physicians and medical students about the study aims and they were invited to undergo CRC screening using two rounds of FIT (DyoniFOB® Combo H, DyonMed SA, Athens, Greece). The tests were provided for free and subjects tested positive were subsequently referred for colonoscopy. One year after completing the two rounds, participants were asked to be re-screened by means of the same test. RESULTS Among our target population consisted of 211 employees, 59 (27.9%) consented to participate, but only 41 (19.4%) and 24 (11.4%) completed the first and the second FIT round, respectively. Female gender was significantly associated with higher initial participation (P = 0.005) and test completion - first and second round - (P = 0.004 and P = 0.05) rates, respectively. Physician’s (13.5% vs 70.2%, P < 0.0001) participation and test completion rates (7.5% vs 57.6%, P < 0.0001 for the first and 2.3% vs 34%, P < 0.0001 for the second round) were significantly lower compared to those of the administrative/technical staff. Similarly, nurses participated (25.8% vs 70.2%, P = 0.0002) and completed the first test round (19.3% vs 57.6%, P = 0.004) in a significant lower rate than the administrative/technical staff. One test proved false positive. No participant repeated the test one year later. CONCLUSION Despite the well-organized, guided and supervised provision of the service, the compliance of the Academic Hospital personnel with a FIT-based CRC screening program was suboptimal, especially among physicians. PMID:27574556

  19. Quantum Chromodynamics

    NASA Astrophysics Data System (ADS)

    Fried, H. M.; Müller, B.; Gabellini, Y.

    2000-11-01

    The Table of Contents for the full book PDF is as follows: * Preface * Basic Concepts and Consequences of a Stochastic Vacuum Model * The Role of the QCD Vacuum in the Heavy-Quark Bound State Dynamics * Stochastic Vacuum Model and High Energy Scattering * Variational Approximations for Correlation Functions in Quantum Field Theories * Long-Range Vacuum Correlations? * Unitary Gauge Theories in Singlet Coordinates * SU(2) Gauge Theory in Covariant (Maximal) Abelian Gauges * Dynamics and Topology of the Gauge-Invariant Gauge Field in Two-Color QCD * The Vacuum Wave Function in Supersymmetric Matrix Theory * Analytic Models for the Forward Scattering Amplitude at High Energies * Extending the Frontiers -- Reconciling Accelerator and Cosmic Ray p - p Cross Sections * HERA Results on Elastic Hadronic and Sub-Hadronic Diffraction * Small-x Structure Functions and QCD Pomeron * AdS/CFT Correspondence for QCD and Pomeron Intercept at Strong Coupling * Short Introduction to QGP Dynamics * Effective Theories for Hot Non-Abelian Dynamics * Non-Perturbative Gluodynamics of High Enerry Heavy-Ion Collisions * Deriving Effective Transport Equations for Non-Abelian Plasmas * Ergodic Properties of Non-Abelian Gauge Theories * String from Large Nc Gauge Fields via Graph Summation on a P+ - x+ Lattice * Aspects of Non-Commutativity in ADS/CFT * Eikonal Scattering of Monopoles and Dyons in Dual QED * Gluon Reggeization and Sudakov Suppression via The Fock-Feynman-Schwinger Approach to QCD * Nonperturbative Gluon Radiation and Energy Dependence of Elastic Scattering * Thermal Field Theory in Equilibrium * Puzzling Aspects of Hot Quantum Fields * Color Superconductivity in Cold, Dense Quark Matter * DIS Results from HERA * Electroproduction of Vector Mesons * Probing the QED and QCD Vacua * New Developments in Cosmology * Duality and SU(1,1) coherent states in the Calogero-Moser Model * pp Elastic scattering at LHC and Signature of Chiral Phase Transition at Large |t| * A New Basis

  20. 100th anniversary of the birth of I Ya Pomeranchuk (Extended session of the all-institute seminar at the Alikhanov Institute for Theoretical and Experimental Physics, 5 - 6 June 2013)

    NASA Astrophysics Data System (ADS)

    2014-02-01

    On 5 - 6 June 2013, an extended session of the all-institute seminar was held at the Russian Federation State Scientific Center 'Alikhanov Institute for Theoretical and Experimental Physics' (ITEP). It was devoted to the 100th anniversary of the birth of Academician Isaak Yakovlevich Pomeranchuk, the founder of the Theory Department of ITEP. The announced agenda of the session on the ITEP website http://www.itep.ru/rus/Pomeranchuk100.html contained the following reports: (1) Gershtein S S (SRC 'Institute for High Energy Physics', Protvino, Moscow region) "I Ya Pomeranchuk and the large accelerator";(2) Keldysh L V (Lebedev Physical Institute, RAS (FIAN), Moscow) "Dynamic tunneling";(3) Vaks V G (National Research Centre 'Kurchatov Institute' (NRC KI), Moscow) "Brief reminiscences";(4) Smilga A V (Laboratoire Physique Subatomique et des technologies associées, Université de Nantes, France) "Vacuum structure in 3D supersymmetric gauge theories";(5) Khriplovich I B (Budker Institute of Nuclear Physics, SB RAS, Novosibirsk) "Gravitational four-fermion interaction and early Universe dynamics";(6) Dremin I M (FIAN, Moscow) "Elastic scattering of hadrons";(7) Belavin A A (Landau Institute of Theoretical Physics, RAS, Moscow) "Correlators in minimal string models";(8) Voloshin M B (Theoretical Physics Institute, University of Minnesota, USA) "Exotic quarkonium";(9) Nekrasov N A (Institut des hautes études scientifiques (IHES), France) "BPS/CFT correspondence";(10) Zarembo K (Uppsala Universitet, Sweden) "Exact results in supersymmetric theories and AdS/CFT correspondence";(11) Gorsky A S (ITEP, Moscow) "Baryon as a dyon instanton";(12) Blinnikov S I (ITEP, Moscow) "Mirror substance and other models for dark matter";(13) Rubakov V A (Institute for Nuclear Research, RAS, Moscow) "Test-tube Universe";(14) Kancheli O V (ITEP, Moscow) "50 years of reggistics";(15) Shevchenko V I (NRC KI) "In search of the chiral magnetic effect";(16) Kirilin V P (ITEP, Moscow) "Anomalies and

  1. 100th anniversary of the birth of I Ya Pomeranchuk (Extended session of the all-institute seminar at the Alikhanov Institute for Theoretical and Experimental Physics, 5 - 6 June 2013)

    NASA Astrophysics Data System (ADS)

    2014-02-01

    On 5 - 6 June 2013, an extended session of the all-institute seminar was held at the Russian Federation State Scientific Center 'Alikhanov Institute for Theoretical and Experimental Physics' (ITEP). It was devoted to the 100th anniversary of the birth of Academician Isaak Yakovlevich Pomeranchuk, the founder of the Theory Department of ITEP. The announced agenda of the session on the ITEP website http://www.itep.ru/rus/Pomeranchuk100.html contained the following reports: (1) Gershtein S S (SRC 'Institute for High Energy Physics', Protvino, Moscow region) "I Ya Pomeranchuk and the large accelerator";(2) Keldysh L V (Lebedev Physical Institute, RAS (FIAN), Moscow) "Dynamic tunneling";(3) Vaks V G (National Research Centre 'Kurchatov Institute' (NRC KI), Moscow) "Brief reminiscences";(4) Smilga A V (Laboratoire Physique Subatomique et des technologies associées, Université de Nantes, France) "Vacuum structure in 3D supersymmetric gauge theories";(5) Khriplovich I B (Budker Institute of Nuclear Physics, SB RAS, Novosibirsk) "Gravitational four-fermion interaction and early Universe dynamics";(6) Dremin I M (FIAN, Moscow) "Elastic scattering of hadrons";(7) Belavin A A (Landau Institute of Theoretical Physics, RAS, Moscow) "Correlators in minimal string models";(8) Voloshin M B (Theoretical Physics Institute, University of Minnesota, USA) "Exotic quarkonium";(9) Nekrasov N A (Institut des hautes études scientifiques (IHES), France) "BPS/CFT correspondence";(10) Zarembo K (Uppsala Universitet, Sweden) "Exact results in supersymmetric theories and AdS/CFT correspondence";(11) Gorsky A S (ITEP, Moscow) "Baryon as a dyon instanton";(12) Blinnikov S I (ITEP, Moscow) "Mirror substance and other models for dark matter";(13) Rubakov V A (Institute for Nuclear Research, RAS, Moscow) "Test-tube Universe";(14) Kancheli O V (ITEP, Moscow) "50 years of reggistics";(15) Shevchenko V I (NRC KI) "In search of the chiral magnetic effect";(16) Kirilin V P (ITEP, Moscow) "Anomalies and

  2. List of Posters

    NASA Astrophysics Data System (ADS)

    . Saturation effects in diffractive scattering at LHC By Oleg Selugin. A nonperturbative expansion method in QCD and R-related quantities By Igor Solovtsov. Z-scaling and high multiplicity particle Production in bar pp/pp & AA collisions at Tevatron and RHIC By Mikhail Tokarev. Scaling behaviour of the reactionsdd - > p↑ /3H and pd - > pd with pT at energy I-2 GeV By Yuri Uzikov. [ADS Note: Title formula can not be rendered correctly in ASCII.] CP violation, rare decays, CKM: Precision Measurements of the Mass of the Top Quark at CDF (Precision Top Mass Measurements at CDF) By Daniel Whiteson. Measurement of the Bs Oscillation at CDF By Luciano Ristori. The Bs mixing phase at LHCb By J. J. van Hunen. ATLAS preparations for precise measurements of semileptonic rare B decays By K. Toms. Hadron spectroscopy & exotics: Searches for radial excited states of charmonium in experiments using cooled antiproton beams By M. Yu. Barabanov. Retardation effects in the rotating string model By Fabien Buisseret and Claude Semay. Final results from VEPP-2M (CMD-2 and SND) By G. V. Fedotovich. Heavy Quark Physics: Prospects for B physics measurements using the CMS detector at the LHC By Andreev Valery. Heavy flavour production at HERA-B By Andrey Bogatyrev. B-Meson subleading form factors in the Heavy Quark Effective Theory (HQET) By Frederic Jugeau. Beyond the Standard Model: Monopole Decay in a Variable External Field By Andrey Zayakin. Two-Loop matching coefficients for the strong coupling in the MSSM By Mihaila Luminita. Test of lepton flavour violation at LHC By Hidaka Keisho. Looking at New Physics through 4 jets and no ET By Maity Manas. Are Preons Dyons? Naturalness of Three Generations By Das Chitta Ranjan. SUSY Dark Matter at Linear Collider By Sezen Sekmen, Mehmet Zeyrek. MSSM light Higgs boson scenario and its test at hadron colliders By Alexander Belyaev. Antiscalar Approach to Gravity and Standard Model By E. Mychelkin. GRID distributed analysis in high energy physics: PAX