0000000000587159

AUTHOR

M Zhao

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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Two-particle transverse momentum correlations in pp and p-Pb collisions at energies available at the CERN Large Hadron Collider

2023

Two-particle transverse momentum differential correlators, recently measured in Pb--Pb collisions at energies available at the CERN Large Hadron Collider (LHC), provide an additional tool to gain insights into particle production mechanisms and infer transport properties, such as the ratio of shear viscosity to entropy density, of the medium created in Pb-Pb collisions. The longitudinal long-range correlations and the large azimuthal anisotropy measured at low transverse momenta in small collision systems, namely pp and p-Pb, at LHC energies resemble manifestations of collective behaviour. This suggests that locally equilibrated matter may be produced in these small collision systems, simil…

two particle correlations large hadron colliderCERN Lablongitudinallarge hadron colliderheavy ion scatteringcollectiveFOS: Physical sciencesanisotropy measuredtransverse momentum correlation[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]High Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)transport theoryTeVcorrelation functionNuclear Experiment (nucl-ex)Nuclear ExperimentMonte Carloeffect viscositycorrelation long-rangetwo-particleentropy densityparticle multiplicityCERN LHC Collangular distribution anisotropybroadeningtransverse momentum lowydinfysiikkatwo particle correlations
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