Measurement of the Lambda_b lifetime in the exclusive decay Lambda_b to J/psi Lambda

Simple item page
dc.creatorD0 Collaboration
dc.creatorAbazov, V.
dc.date2007-04-30
dc.date2007-08-30
dc.date.accessioned2026-07-07T11:56:45Z
dc.date.available2026-07-07T11:56:45Z
dc.descriptionWe have measured the Lambda_b lifetime using the exclusive decay Lambda_b to J/psi Lambda, based on 1.2 fb-1 of data collected with the D0 detector during 2002-2006. From 171 reconstructed Lambda_b decays, where the J/psi and Lambda are identified via the decays J/psi to mu+ mu- and Lambda to p pi, we measured the Lambda_b lifetime to be tau(Lambda_b) = 1.218(+0.130,-0.115)(stat) +/- 0.042(syst)ps. We also measured the B0 lifetime in the decay B0 to J/psi(mu+ mu-)K0_S(pi+ pi-) to be tau(B0) = 1.501(+0.078,-0.074)(stat) +/ -0.050(syst)ps, yielding a lifetime ratio of tau(Lambda_b)/tau(B0) = 0.811(+0.096,-0.087)(stat) +/ -0.034(syst). These measurements are consistent with the current world averages and support the shorter lifetime of the Lambda_b with respect to B mesons, in contrast to another recent measurement of significant precision.
dc.descriptionThis version has been accepted for publication in Physical Review Letters
dc.identifierhttps://arxiv.org/abs/0704.3909
dc.identifierhttp://arxiv.org/abs/0704.3909
dc.identifierPhys.Rev.Lett.99:142001,2007
dc.identifierdoi:10.1103/PhysRevLett.99.142001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/205642
dc.subjectHigh Energy Physics - Experiment
dc.titleMeasurement of the Lambda_b lifetime in the exclusive decay Lambda_b to J/psi Lambda
dc.typetext

Files

Collections

arXiv