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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;
  • Calvi, M;
  • Calvo Gomez, M;
  • Campana, P;
  • Campora Perez, D;
  • Capriotti, L;
  • Carbone, A;
  • Carboni, G;
  • Cardinale, R
  • et al.

Published Web Location

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

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.

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