Search for $CP$ violation in $Ξ_b^- \to p K^- K^-$ decays
Creators: name: LHCb Collaboration
name: Aaij, R.
name: Beteta, C. Abellán
name: Ackernley, T.
name: Adeva, B.
name: Adinolfi, M.
name: Afsharnia, H.
name: Aidala, C. A.
name: Aiola, S.
name: Ajaltouni, Z.
name: Akar, S.
name: Albrecht, J.
name: Alessio, F.
name: Alexander, M.
name: Albero, A. Alfonso
name: Aliouche, Z.
name: Alkhazov, G.
name: Cartelle, P. Alvarez
name: Amato, S.
name: Amhis, Y.
name: An, L.
name: Anderlini, L.
name: Andreianov, A.
name: Andreotti, M.
name: Archilli, F.
name: Artamonov, A.
name: Artuso, M.
name: Arzymatov, K.
name: Aslanides, E.
name: Atzeni, M.
name: Audurier, B.
name: Bachmann, S.
name: Bachmayer, M.
name: Back, J. J.
name: Rodriguez, P. Baladron
name: Balagura, V.
name: Baldini, W.
name: Leite, J. Baptista
name: Barlow, R. J.
name: Barsuk, S.
name: Barter, W.
name: Bartolini, M.
name: Baryshnikov, F.
name: Basels, J. M.
name: Bassi, G.
name: Batsukh, B.
name: Battig, A.
name: Bay, A.
name: Becker, M.
name: Bedeschi, F.
name: Bediaga, I.
name: Beiter, A.
name: Belavin, V.
name: Belin, S.
name: Bellee, V.
name: Belous, K.
name: Belov, I.
name: Belyaev, I.
name: Bencivenni, G.
name: Ben-Haim, E.
name: Berezhnoy, A.
name: Bernet, R.
name: Berninghoff, D.
name: Bernstein, H. C.
name: Bertella, C.
name: Bertolin, A.
name: Betancourt, C.
name: Betti, F.
name: Bezshyiko, Ia.
name: Bhasin, S.
name: Bhom, J.
name: Bian, L.
name: Bieker, M. S.
name: Bifani, S.
name: Billoir, P.
name: Birch, M.
name: Bishop, F. C. R.
name: Bitadze, A.
name: Bizzeti, A.
name: Bjørn, M.
name: Blago, M. P.
name: Blake, T.
name: Blanc, F.
name: Blusk, S.
name: Bobulska, D.
name: Boelhauve, J. A.
name: Garcia, O. Boente
name: Boettcher, T.
name: Boldyrev, A.
name: Bondar, A.
name: Bondar, N.
name: Borghi, S.
name: Borisyak, M.
name: Borsato, M.
name: Borsuk, J. T.
name: Bouchiba, S. A.
name: Bowcock, T. J. V.
name: Boyer, A.
name: Bozzi, C.
name: Bradley, M. J.
name: Braun, S.
name: Rodriguez, A. Brea
name: Brodski, M.
name: Brodzicka, J.
name: Gonzalo, A. Brossa
name: Brundu, D.
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name: Byczynski, W.
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name: Cai, H.
name: Calabrese, R.
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name: Diaz, L. Calero
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name: Calladine, R.
name: Calvi, M.
name: Gomez, M. Calvo
name: Magalhaes, P. Camargo
name: Campana, P.
name: Quezada, A. F. Campoverde
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name: Capriotti, L.
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Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: A search for $CP$ violation in charmless three-body $Ξ_b^- \to p K^- K^-$ decays is performed using $pp$ collision data recorded with the LHCb detector, corresponding to integrated luminosities of $1\,\text{fb}^{-1}$ at a centre-of-mass energy $\sqrt{s} = 7\,\text{TeV}$, $2\,\text{fb}^{-1}$ at $\sqrt{s} = 8\,\text{TeV}$ and $2\,\text{fb}^{-1}$ at $\sqrt{s} = 13\,\text{TeV}$. A good description of the phase-space distribution is obtained with an amplitude model containing contributions from $Σ(1385)$, $Λ(1405)$, $Λ(1520)$, $Λ(1670)$, $Σ(1775)$ and $Σ(1915)$ resonances. The model allows for $CP$-violation effects, which are found to be consistent with zero. The branching fractions of $Ξ_b^- \to Σ(1385) K^-$, $Ξ_b^- \to Λ(1405) K^-$, $Ξ_b^- \to Λ(1520) K^-$, $Ξ_b^- \to Λ(1670) K^-$, $Ξ_b^- \to Σ(1775) K^-$ and $Ξ_b^- \to Σ(1915) K^-$ decays are also reported. In addition, an upper limit is placed on the product of ratios of $Ω_b^-$ and $Ξ_b^-$ fragmentation fractions and the $Ω_b^- \to p K^- K^-$ and $Ξ_b^- \to p K^- K^-$ branching fractions.
description: All figures and tables, along with machine-readable versions and any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2020-017.html (LHCb public pages)