We present a search for the decay B+?a1+(1260)K*0(892). The data, collected with the BABAR detector at the SLAC National Accelerator Laboratory, represent 465�106B&Bmacr; pairs produced in e+e- annihilation at the energy of the ?(4S). We find no significant signal and set an upper limit at 90% confidence level on the product of branching fractions ...

We develop a practical method to analyze the mixing structure of hadrons consisting of two components of quark composite and hadronic composite. As an example, we investigate the properties of the axial vector meson a1(1260) and discuss its mixing properties quantitatively. We also make reference to the large Nc procedure and its ...

We present measurements of the branching fractions for the decays B;{+/-}-->a_{1};{+/-}(1260)pi;{0} and B;{+/-}-->a_{1};{0}(1260)pi;{+/-} from a data sample of 232x10;{6} BB[over ] pairs produced in e;{+}e;{-} annihilation through the Upsilon(4S) resonance. We measure the branching fraction ...

. The spin-parity analysis of the data on the {p} p -> 2 ? ^ + 2 ? - annihilation reaction at rest in liquid and in gaseous hydrogen at 3 bar pressure and in flight at /line p momentum of ~= 50 MeV/c, collected by the Obelix spectrometer at the LEAR complex of CERN, is presented. The relative branching ratios (a1(1260) -> ? ? ) ...

We summarize the work of ref. [1] where a theoretical study of the properties of the a1(1260) axial-vector resonance in a cold nuclear medium is carried out. We start from a vacuum model for the a1(1260) resonance where it is generated dynamically from the interactions of a pseudoscalar and vector meson (?? and KK*) in a coupled channel chiral unitary approach. The medium ...

We present results for measurements of B0 meson decays to charmless final states ?K0, ??, a1+(1260)? - with a0+(1260) -> ? +? ^+? ^-, ? 0KS0, KS0K_S0K_S0, and of B+ to ??+ and ?'?+. Analyses are based on data taken with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We measure the following branching fractions ...

We present a theoretical study of the properties of the a_1(1260) axial-vector resonance in a cold nuclear medium. In the vacuum, the a_1(1260) resonance is generated dynamically from the interactions of a pseudoscalar and vector meson (rhopi and Kbar{K}(*) ) in a coupled channel chiral unitary approach. Medium effects are implemented through the modification of the rho and pi ...

We present a Regge model for pion photoproduction which is basically free of parameters within the framework of the s-channel helicity amplitude. For completeness we take into account axial mesons a1(1260), b1(1235) and tensor meson a2(1320) in addition to the primary ?+? exchanges for charged pion photoproduction, ...

We study the charmless hadronic Bc ? AV(VA) decays in the perturbative QCD(pQCD) approach, where A is either a 3P1 or a 1P1 axial-vector meson and V stands for the vector meson. All considered 30 decay channels can only occur through the annihilation topologies in the standard model. Based on the perturbative calculations and the phenomenological analysis, ...

We report measurements of the branching fractions of neutral and charged B meson decays to final states containing a K1(1270) or K1(1400) meson and a charged pion. The data, collected with the BABAR detector at the SLAC National Accelerator Laboratory, correspond to 454�106 B&Bmacr; pairs produced in e+e- annihilation. We measure the branching ...

We report measurements of the branching fractions of neutral and charged B meson decays to final states containing a K{sub 1}(1270) or K{sub 1}(1400) meson and a charged pion. The data, collected with the BABAR detector at the SLAC National Accelerator Laboratory, correspond to 454 million B{bar B} pairs produced in e{sup +}e{sup -} annihilation. We ...

In this paper we calculate the branching ratios (BRs) of the 32 charmless hadronic Bc?AP decays (A=a1(1260),b1(1235),K1(1270),K1(1400),f1(1285),f1(1420),h1(1170),h1(1380)) by employing the perturbative QCD factorization approach. These considered decay channels can only occur via annihilation type diagrams in the standard model. From the numerical ...

We present the studies of the decays B?a1(1260)? and a1(1260)K within the framework of QCD factorization. Because of the G-parity, unlike the vector meson, the chiral-odd two-parton light-cone distribution amplitudes of the a1 are antisymmetric under the exchange of quark and antiquark momentum fractions in the SU(2) limit. The ...

In the Standard Model, CP violation in weak interactions involving quarks is parameterized by an irreducible complex phase in the Cabibbo-Kobayashi-Maskawa (CKM) quark-mixing-matrix. The precise determination of the CKM elements is a necessary ingredient for a stringent test of the Standard Model predictions, and is a crucial input for reducing the theoretical error in many New Physics searches ...

We present measurements of the branching fraction B and longitudinal polarization fraction fL for B0?a1(1260)+a1(1260)- decays, with a1(1260)�??-?+?�. The data sample, collected with the BABAR detector at the SLAC National Accelerator Laboratory, represents 465�106 produced B&Bmacr; pairs. We measure ...

We present branching fraction measurements of the decays B(+)-->a(1)(+)(1260)K(0) and B(0)-->a(1)(-)(1260)K(+) with a(1)(+/-)(1260)-->pi(-/+)pi(+/-)pi(+/-). The data sample corresponds to 383 x 10(6) BB pairs produced in e(+)e(-) annihilation through the Upsilon(4S) resonance. We measure the products of the branching fractions ...

We present recent measurements of the CKM angles ? and ? using data collected by the BABAR detector at the PEP-II asymmetric-energy e+e- collider at the Stanford Linear Accelerator Center. In addition to constraints on ? from the decays B0 ? ?+?-, B0 ? ?�??, and B0 ? ?+?-, we also report the first measurement of time-dependent CP asymmetries in the decay B0 -> ...

... Descriptors : (*MESON CAPTURE, WAVE FUNCTIONS), (*MUONS, MESON CAPTURE), (*CARBON, MESON CAPTURE), (*OXYGEN, MESON ...

... Descriptors : (*MESON SCATTERING, NUCLEONS), (*RESONANCE SCATTERING, MESONS), (*INTEGRAL EQUATIONS, MESON SCATTERING ...

A description of exclusive charged-pion electroproduction (e,e'?�) off nucleons at high energies is proposed. The model combines a Regge pole approach with the residual effect of nucleon resonances. The exchanges of ?(140), vector ?(770), and axial-vector a1(1260) and b1(1235) Regge trajectories are considered. The contribution of nucleon resonances is ...

The authors present measurements of the branching fraction {Beta} and longitudinal polarization fraction f{sub L} for B{sup 0} {yields} a{sub 1}(1260){sup +} a{sub 1}(1260){sup -} decays, with a{sub 1}(1260){sup {+-}} {yields} {pi}{sup -}{pi}{sup +}{pi}{sup {+-}}. The data sample, collected with the BABAR detector at the SLAC National Accelerator Laboratory, represents 465 x 10{sup 6} produced ...

... the mesons from neutron has always been studied indirectly mainly through the ... it mesons by deuterons, They calculated ...

... MESON REACTIONS, *NUCLEAR SCATTERING), (*BARYONS, NUCLEAR SCATTERING), K MESONS, ANTIPARTICLES, NUCLEONS, SIGMA ...

... MESON REACTIONS, THEORY), (*K MESONS, MESON REACTIONS), PIONS, DECAY SCHEMES, MATHEMATICAL MODELS, ANTIPARTICLES. ...

... MESON REACTIONS, NUCLEI, NUCLEAR REACTIONS, NUCLEONS, MESON CROSS SECTIONS, ANTIPROTONS, PARTICLE TRAJECTORIES ...