Measurement of b Hadron Lifetimes in Exclusive Decays Containing a J/psi in pp[over-bar] Collisions at [sqrt]s=1.96 TeV
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Aaltonen-2011-Measurement of b Had.pdf
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Author(s)
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Paus, Christoph M. E.
Bauer, Gerry P
Makhoul, Khaldoun
Alternative Title
Measurement of b Hadron Lifetimes in Exclusive Decays Containing a J/ψ in pp̅ Collisions at √s=1.96 TeV
Date Issued
March 2011
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
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.106.121804
