Skip to main content
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.93.092007No 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.