Skip to main content
eScholarship
Open Access Publications from the University of California

Measurement of the mass and lifetime of the Ωb- baryon

  • Author(s): Aaij, R
  • Abellán Beteta, C
  • Adeva, B
  • Adinolfi, M
  • Ajaltouni, Z
  • Akar, S
  • Albrecht, J
  • Alessio, F
  • Alexander, M
  • Ali, S
  • Alkhazov, G
  • Alvarez Cartelle, P
  • Alves, AA
  • Amato, S
  • Amerio, S
  • Amhis, Y
  • An, L
  • Anderlini, L
  • Andreassi, G
  • Andreotti, M
  • Andrews, JE
  • Appleby, RB
  • Aquines Gutierrez, O
  • Archilli, F
  • D'Argent, P
  • Artamonov, A
  • Artuso, M
  • Aslanides, E
  • Auriemma, G
  • Baalouch, M
  • Bachmann, S
  • Back, JJ
  • Badalov, A
  • Baesso, C
  • Baker, S
  • Baldini, W
  • Barlow, RJ
  • Barschel, C
  • Barsuk, S
  • Barter, W
  • Batozskaya, V
  • Battista, V
  • Bay, A
  • Beaucourt, L
  • Beddow, J
  • Bedeschi, F
  • Bediaga, I
  • Bel, LJ
  • Bellee, V
  • Belloli, N
  • Belyaev, I
  • Ben-Haim, E
  • Bencivenni, G
  • Benson, S
  • Benton, J
  • Berezhnoy, A
  • Bernet, R
  • Bertolin, A
  • Betti, F
  • Bettler, MO
  • Van Beuzekom, M
  • Bifani, S
  • Billoir, P
  • Bird, T
  • Birnkraut, A
  • Bizzeti, A
  • Blake, T
  • Blanc, F
  • Blouw, J
  • Blusk, S
  • Bocci, V
  • Bondar, A
  • Bondar, N
  • Bonivento, W
  • Borgheresi, A
  • Borghi, S
  • Borisyak, M
  • Borsato, M
  • Boubdir, M
  • Bowcock, TJV
  • Bowen, E
  • Bozzi, C
  • Braun, S
  • Britsch, M
  • Britton, T
  • Brodzicka, J
  • Buchanan, E
  • Burr, C
  • Bursche, A
  • Buytaert, J
  • Cadeddu, S
  • Calabrese, R
  • et al.

Published Web Location

http://doi.org/10.1103/PhysRevD.93.092007
No data is associated with this publication.
Abstract

© 2016 CERN, for the LHCb Collaboration. Published by the American Physical Society under the terms of the http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. A proton-proton collision data sample, corresponding to an integrated luminosity of 3 fb-1 collected by LHCb at s=7 and 8 TeV, is used to reconstruct 63±9 Ωb-→Ωc0π-, Ωc0→pK-K-π+ decays. Using the Ξb-→Ξc0π-, Ξc0→pK-K-π+ decay mode for calibration, the lifetime ratio and the absolute lifetime of the Ωb- baryon are measured to be τΩb-/τΞb-=1.11±0.16±0.03, τΩb-=1.78±0.26±0.05±0.06 ps, where the uncertainties are statistical, systematic and from the calibration mode (for τΩb- only). A measurement is also made of the mass difference, mΩb - mΞb-, and the corresponding Ωb- mass, which yields mΩb - mΞb-=247.4±3.2±0.5 MeV/c2, mΩb-=6045.1±3.2±0.5±0.6 MeV/c2. These results are consistent with previous measurements.

Item not freely available? Link broken?
Report a problem accessing this item