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Título : Measurement of b Hadron Lifetimes in Exclusive Decays Containing a J/ψ in pp̅ Collisions at √s=1.96  TeV
Autor : Aaltonen, T., Álvarez González, B., Casal, Bruno, Cuevas, Javier, Gómez, G., Palencia, Enrique, Rodrigo, Teresa, Scodellaro, Luca, Vila, Iván, Vilar, Rocío, Zucchelli, S., Cabrera, Susana, Cuenca Almenar, Cristóbal, Ruiz Jimeno, Alberto
Fecha de publicación : 24-Mar-2011
Editor: American Physical Society
Citación : Physical Review Letters 106(12): 121804 (2011)
Resumen: We report on a measurement of b-hadron lifetimes in the fully reconstructed decay modes B+→J/ψK+, B0→J/ψK*(892)0, B0→J/ψKs0, and Λb0→J/ψΛ0 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 τ(B+)=[1.639±0.009(stat)±0.009(syst)]  ps, τ(B0)=[1.507±0.010(stat)±0.008(syst)]  ps, and τ(Λb0)=[1.537±0.045(stat)±0.014(syst)]  ps. The lifetime ratios are τ(B+)/τ(B0)=[1.088±0.009(stat)±0.004(syst)] and τ(Λb0)/τ(B0)=[1.020±0.030(stat)±0.008(syst)]. These are the most precise determinations of these quantities from a single experiment.
Descripción : 8 páginas, 2 figuras, 1 tabla.-- Grupo de trabajo: CDF Collaboration.-- PACS numbers: 13.25.Hw, 13.30.Eg, 14.20.Mr, 14.40.Nd.-- et al.
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ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.106.121804
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