0000000000224526

AUTHOR

Gh De Monchenault

showing 3 related works from this author

Measurement of Semileptonic B Decays into Orbitally Excited Charmed Mesons

2009

We present a study of B decays into semileptonic final states containing charged and neutral D-1(2420) and D-2*(2460). The analysis is based on a data sample of 208 fb(-1) collected at the Y(4S) resonance with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. With a simultaneous fit to four different decay chains, the semileptonic branching fractions are extracted from measurements of the mass difference Delta m = m(D**) - m(D) distribution. Product branching fractions are determined to be B(B+ -> D(1)(0)l(+)nu(l)) x B(D-1(0) -> D*+pi(-)) = (2.97 +/- 0.17 +/- 0.17) x 10(-3), B(B+ -> D-2*l(+)nu(e)) x B(D-2*(0) -> D(*)+pi(-)) = (2.29 +/- 0.23 +/- 0.21) x 10(-3), B(B-0 -> D…

Semileptonic decayParticle physicsMesonBABARHadronAnalytical chemistryGeneral Physics and AstronomyFOS: Physical sciencesB meson01 natural sciencesPARTICLE PHYSICS; PEP2; BABARHigh Energy Physics - ExperimentParticle decayHigh Energy Physics - Experiment (hep-ex)Pion0103 physical sciencesPEP2[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]B meson010306 general physicsB meson; CP violationPhysics010308 nuclear & particles physicsBranching fractionParticle physicsBABAR detectorHEPB-factoryCP violationBaBarPARTICLE PHYSICSFísica de partículesExperimentsPHYSICAL REVIEW LETTERS
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Measurements of the Absolute Branching Fractions of B± →k±Xc c

2020

A study of the two-body decays B±→XccK±, where Xcc refers to one charmonium state, is reported by the BABAR Collaboration using a data sample of 424 fb-1. The absolute determination of branching fractions for these decays are significantly improved compared to previous BABAR measurements. Evidence is found for the decay B+→X(3872)K+ at the 3σ level. The absolute branching fraction B[B+→X(3872)K+]=[2.1±0.6(stat)±0.3(syst)]×10-4 is measured for the first time. It follows that B[X(3872)→J/ψπ+π-]=(4.1±1.3)%, supporting the hypothesis of a molecular component for this resonance.

PhysicsParticle physics:Kjerne- og elementærpartikkelfysikk: 431 [VDP]Meson010308 nuclear & particles physicsElectron–positron annihilationGeneral Physics and AstronomyBaBar experimentBottom mesonBaBar; PEP-II; B meson; Bottom mesons;Bottom mesonsB mesonBranching (polymer chemistry)7. Clean energy01 natural sciencesLower limitHEPNO:Nuclear and elementary particle physics: 431 [VDP]0103 physical sciencesBaBarPEP-IIB meson010306 general physicsBar (unit)
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Rates, polarizations, and asymmetries in charmless vector-vector B meson decays

2003

With a sample of approximately 89 million BBbar pairs collected with the BABAR detector, we perform a search for B meson decays into pairs of charmless vector mesons (phi, rho, and K*). We measure the branching fractions, determine the degree of longitudinal polarization, and search for CP violation asymmetries in the processes B->phiK*+, B->phiK*0, B->rho0K*+, and B->rho0rho+. We also set an upper limit on the branching fraction for the decay B->rho0rho0.

Particle physicsMesonBABARElectron–positron annihilationHadronFOS: Physical sciencesGeneral Physics and AstronomyElementary particleResonancePARTICLE PHYSICS; PEP2; BABAR01 natural sciencesNOHigh Energy Physics - ExperimentHigh energy physicHigh Energy Physics - Experiment (hep-ex)Particle decayElectromagnetic calorimeterPolarizationProbability density function0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]PEP2B mesonDecay dynamic010306 general physicsPhysicsCalorimeter010308 nuclear & particles physicsBranching fractionCP-ASYMMETRIES VIOLATION SEARCH B->VVColliding beam acceleratorComputer simulationDecay rateMonte Carlo methodCrystallographyPARTICLE PHYSICSCP violationHigh Energy Physics::ExperimentParticle detectorProton
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