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.93.092007Abstract
© 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.