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

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  • R. Aaij
  • B. Adeva
  • M. Adinolfi
  • A. Affolder
  • Z. Ajaltouni
  • J. Albrecht
  • F. Alessio
  • M. Alexander
  • S. Ali
  • G. Alkhazov
  • P. Alvarez Cartelle
  • A. A. Alves
  • S. Amato
  • S. Amerio
  • Y. Amhis
  • L. An
  • L. Anderlini
  • J. Anderson
  • R. Andreassen
  • M. Andreotti
  • J. E. Andrews
  • R. B. Appleby
  • O. Aquines Gutierrez
  • F. Archilli
  • A. Artamonov
  • M. Artuso
  • E. Aslanides
  • G. Auriemma
  • M. Baalouch
  • S. Bachmann
  • J. J. Back
  • A. Badalov
  • V. Balagura
  • W. Baldini
  • R. J. Barlow
  • C. Barschel
  • S. Barsuk
  • W. Barter
  • V. Batozskaya
  • Th. Bauer
  • A. Bay
  • Laurence Carson
  • P. E. L. Clarke
  • G. A. Cowan
  • Daniel Craik
  • S. Eisenhardt
  • Silvia Gambetta
  • F. Muheim
  • M. Needham
  • S. Playfer
  • LHCb Collaboration

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Original languageEnglish
Article numberAaij:2014sia
Pages (from-to)154-162
Number of pages9
JournalPhysics Letters B
Volume736
DOIs
Publication statusPublished - 7 Sep 2014

Abstract

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 be

tau(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.

    Research areas

  • B-BARYONS, Z-DECAYS, LAMBDA(B)(0), RATIO

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