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Measurement of b Hadron Lifetimes in Exclusive Decays Containing a J/psi in pp[over-bar] Collisions at [sqrt]s=1.96  TeV

Author(s)
Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Paus, Christoph M. E.; Bauer, Gerry P; Makhoul, Khaldoun
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Alternative title
Measurement of b Hadron Lifetimes in Exclusive Decays Containing a J/ψ in pp̅ Collisions at √s=1.96  TeV
Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
We report on a measurement of b-hadron lifetimes in the fully reconstructed decay modes B+-->J/psiK+, B0-->J/psiK*(892)0, B0-->J/psiKs0, and Lambdab0-->J/psiLambda0 using data corresponding to an integrated luminosity of 4.3  fb-1, collected by the CDF II detector at the Fermilab Tevatron. The measured lifetimes are tau(B+)=[1.639±0.009(stat)±0.009(syst)]  ps, tau(B0)=[1.507±0.010(stat)±0.008(syst)]  ps, and tau(Lambdab0)=[1.537±0.045(stat)±0.014(syst)]  ps. The lifetime ratios are tau(B+)/tau(B0)=[1.088±0.009(stat)±0.004(syst)] and tau(Lambdab0)/tau(B0)=[1.020±0.030(stat)±0.008(syst)]. These are the most precise determinations of these quantities from a single experiment.
Date issued
2011-03
URI
http://hdl.handle.net/1721.1/65962
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaltonen, T. et al. "Measurement of b Hadron Lifetimes in Exclusive Decays Containing a J/psi in pp[over-bar] Collisions at [sqrt]s=1.96  TeV." (CDF Collaboration) © 2011 American Physical Society.
Version: Final published version
ISSN
0031-9007

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