Measurement of the Ξ-b and Ω-b baryon lifetimes

LHCb Collaboration, 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. AndreassenM. 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, S. Bifani, N. Farley, P. Griffith, P. Ilten, I. R. Kenyon, C. Lazzeroni, A. Mazurov, J. McCarthy, C. J. Parkinson, L. Pescatore, D. Popov, N. K. Watson

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Abstract

Using a data sample of pp collisions corresponding to an integrated luminosity of 3 fb-1, the Ξ-b and Ω-b baryons are reconstructed in the Ξ-b→J/ψΞ- and Ω-b→J/ψΩ- decay modes and their lifetimes measured to be τ(Ξ-b)=1.55+0.10-0.09(stat)±0.03(syst)ps, τ(Ω-b)=1.54+0.26-0.21(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.

Original languageEnglish
Pages (from-to)154-162
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume736
Early online date26 Jun 2014
DOIs
Publication statusPublished - 7 Sep 2014

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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