Measurement of the Xi(-)(b) and Omega(-)(b) baryon lifetimes

LHCb collaboration, Olivier Schneider*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

15 Citations (Web of Science)


Using a data sample of pp collisions corresponding to an integrated luminosity of 3 fb(-1), the Xi(-)(b) and Omega(-)(b) baryons are reconstructed in the Xi(-)(b) -> J/psi Xi(-) and Omega(-)(b) -> J/psi Omega(-) decay modes and their lifetimes measured to betau(Xi(-)(b)) = 1.55(-0.09)(+0.10) (stat) +/- 0.03 (syst) ps,tau(Omega(-)(b)) = 1.54(-0.21)(+0.26) (stat) +/- 0.05 (syst) ps.These are the most precise determinations to date. Both measurements are in good agreement with previous experimental results and with theoretical predictions. (C) 2014 The Authors. Published by Elsevier B.V.
Original languageEnglish
Pages (from-to)154-162
Number of pages9
JournalPhysics Letters B
Publication statusPublished - 7 Sep 2014
Externally publishedYes



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