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Measurement of the Λ<sub>b</sub> lifetime in the exclusive decay Λ<sub>b</sub> → J/ψ Λ.

Abazov, V. M. and Bertram, Iain and Borissov, Guennadi and Fox, Harald and Ratoff, Peter and Sopczak, Andre (2007) Measurement of the Λ<sub>b</sub> lifetime in the exclusive decay Λ<sub>b</sub> → J/ψ Λ. Physical Review Letters, 99. p. 142001. ISSN 1079-7114

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Abstract

We have measured the b lifetime using the exclusive decay bJ/, based on 1.2 fb-1 of data collected with the D0 detector during 2002–2006. From 171 reconstructed b decays, where the J/ and are identified via the decays J/µ+µ- and p, we measured the b lifetime to be (b)=1.218(stat)±0.042(syst) ps. We also measured the B0 lifetime in the decay B0J/(µ+µ-)K(+-) to be (B0)=1.501(stat)±0.050(syst) ps, yielding a lifetime ratio of (b)/(B0)=0.811(stat)±0.034(syst).

Item Type: Article
Journal or Publication Title: Physical Review Letters
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 11246
Deposited By: Dr Iain Bertram
Deposited On: 12 Aug 2008 16:21
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 14:58
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/11246

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