Measurement of the $Ξ_b^-$ and $Ω_b^-$ baryon lifetimes
Creators: name: LHCb Collaboration
name: Aaij, R.
name: Adeva, B.
name: Adinolfi, M.
name: Affolder, A.
name: Ajaltouni, Z.
name: Albrecht, J.
name: Alessio, F.
name: Alexander, M.
name: Ali, S.
name: Alkhazov, G.
name: Cartelle, P. Alvarez
name: Alves, A. A.
name: Amato, S.
name: Amerio, S.
name: Amhis, Y.
name: An, L.
name: Anderlini, L.
name: Anderson, J.
name: Andreassen, R.
name: Andreotti, M.
name: Andrews, J. E.
name: Appleby, R. B.
name: Gutierrez, O. Aquines
name: Archilli, F.
name: Artamonov, A.
name: Artuso, M.
name: Aslanides, E.
name: Auriemma, G.
name: Baalouch, M.
name: Bachmann, S.
name: Back, J. J.
name: Badalov, A.
name: Balagura, V.
name: Baldini, W.
name: Barlow, R. J.
name: Barschel, C.
name: Barsuk, S.
name: Barter, W.
name: Batozskaya, V.
name: Bauer, Th.
name: Bay, A.
name: Beddow, J.
name: Bedeschi, F.
name: Bediaga, I.
name: Belogurov, S.
name: Belous, K.
name: Belyaev, I.
name: Ben-Haim, E.
name: Bencivenni, G.
name: Benson, S.
name: Benton, J.
name: Berezhnoy, A.
name: Bernet, R.
name: Bettler, M. -O.
name: van Beuzekom, M.
name: Bien, A.
name: Bifani, S.
name: Bird, T.
name: Bizzeti, A.
name: Bjørnstad, P. M.
name: Blake, T.
name: Blanc, F.
name: Blouw, J.
name: Blusk, S.
name: Bocci, V.
name: Bondar, A.
name: Bondar, N.
name: Bonivento, W.
name: Borghi, S.
name: Borgia, A.
name: Borsato, M.
name: Bowcock, T. J. V.
name: Bowen, E.
name: Bozzi, C.
name: Brambach, T.
name: Brand, J. van den
name: Bressieux, J.
name: Brett, D.
name: Britsch, M.
name: Britton, T.
name: Brook, N. H.
name: Brown, H.
name: Bursche, A.
name: Busetto, G.
name: Buytaert, J.
name: Cadeddu, S.
name: Calabrese, R.
name: Calvi, M.
name: Gomez, M. Calvo
name: Camboni, A.
name: Campana, P.
name: Perez, D. Campora
name: Carbone, A.
name: Carboni, G.
name: Cardinale, R.
name: Cardini, A.
name: Carranza-Mejia, H.
name: Carson, L.
name: Akiba, K. Carvalho
name: Casse, G.
name: Cassina, L.
name: Garcia, L. Castillo
name: Cattaneo, M.
name: Cauet, Ch.
name: Cenci, R.
name: Charles, M.
name: Charpentier, Ph.
name: Cheung, S. -F.
name: Chiapolini, N.
name: Chrzaszcz, M.
name: Ciba, K.
name: Vidal, X. Cid
name: Ciezarek, G.
name: Clarke, P. E. L.
name: Clemencic, M.
name: Cliff, H. V.
name: Closier, J.
name: Coco, V.
name: Cogan, J.
name: Cogneras, E.
name: Collins, P.
name: Comerma-Montells, A.
name: Contu, A.
name: Cook, A.
name: Coombes, M.
name: Coquereau, S.
name: Corti, G.
name: Corvo, M.
name: Counts, I.
name: Couturier, B.
name: Cowan, G. A.
name: Craik, D. C.
name: Torres, M. Cruz
name: Cunliffe, S.
name: Currie, R.
name: D'Ambrosio, C.
name: Dalseno, J.
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name: David, P. N. Y.
name: Davis, A.
name: De Bruyn, K.
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name: De Paula, L.
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name: Deckenhoff, M.
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name: Donleavy, S.
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name: Suárez, A. Dosil
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name: Färber, C.
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Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: Using a data sample of pp collisions corresponding to an integrated luminosity of $3~ \rm fb^{-1}$, the $Ξ_b^-$ and $Ω_b^-$ baryons are reconstructed in the $Ξ_b^- \rightarrow J/ψΞ^-$ and $Ω_b^- \rightarrow J/ψΩ^-$ decay modes and their lifetimes measured to be $τ(Ξ_b^-) = 1.55\, ^{+0.10}_{-0.09}~{\rm(stat)} \pm 0.03\,{\rm(syst)}$ ps, $τ(Ω_b^-) = 1.54\, ^{+0.26}_{-0.21}~{\rm(stat)} \pm 0.05\,{\rm(syst)}$ ps. These are the most precise determinations to date. Both measurements are in good agreement with previous experimental results and with theoretical predictions.
description: 13 pages, 3 figures