0000000000587092

AUTHOR

Cj Flacco

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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Improved limits on the lepton-flavor violating decays tau(-) -> l(-)l(+)l(-)

2007

A search for the neutrinoless, lepton-flavor violating decay of the tau lepton into three charged leptons has been performed using 376fb-1 of data collected at an e+e- center-of-mass energy around 10.58 GeV with the BABAR detector at the SLAC PEP-II storage rings. In all six decay modes considered, the numbers of events found in data are compatible with the background expectations. Upper limits on the branching fractions are set in the range (4-8)×10-8 at 90% confidence level. © 2007 The American Physical Society.

Particle physicsVIOLATIONMesonElectron–positron annihilationCharged particleGeneral Physics and AstronomyElectron01 natural sciencesNuclear physicsParticle decaySEARCH; LEPTON; FLAVOR; VIOLATION; BABAR; SLACPositronSEARCH0103 physical sciencesFree energyLEPTON010306 general physicsPhysicsVolume fractionMuon010308 nuclear & particles physicsBranching fractionHigh Energy Physics::PhenomenologyParticle physicsBABAR detectorLepton flavorCharged leptonHEPGermanium compoundBaBarHigh Energy Physics::ExperimentParticle detectorSLACFísica de partículesExperimentsFLAVORLepton
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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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