Resonances and $CP$ violation in $B_s^0$ and $\overline{B}_s^0 \to J/ψK^+K^-$ decays in the mass region above the $ϕ(1020)$
Creators: name: LHCb Collaboration
name: Aaij, R.
name: Adeva, B.
name: Adinolfi, M.
name: Ajaltouni, Z.
name: Akar, S.
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: Andreassi, G.
name: Andreotti, M.
name: Andrews, J. E.
name: Appleby, R. B.
name: Archilli, F.
name: d'Argent, P.
name: Romeu, J. Arnau
name: Artamonov, A.
name: Artuso, M.
name: Aslanides, E.
name: Auriemma, G.
name: Baalouch, M.
name: Babuschkin, I.
name: Bachmann, S.
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name: Badalov, A.
name: Baesso, C.
name: Baker, S.
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name: Baldini, W.
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name: Barlow, R. J.
name: Barschel, C.
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name: Baryshnikov, F.
name: Baszczyk, M.
name: Batozskaya, V.
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name: Bay, A.
name: Beaucourt, L.
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name: Bencivenni, G.
name: Benson, S.
name: Beranek, S.
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name: Bernet, R.
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name: Bettler, M. -O.
name: van Beuzekom, M.
name: Bezshyiko, Ia.
name: Bifani, S.
name: Billoir, P.
name: Birnkraut, A.
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name: Bizzeti, A.
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name: Blanc, F.
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name: Xie, Y.
name: Xu, Z.
name: Yang, Z.
name: Yang, Z.
name: Yao, Y.
name: Yin, H.
name: Yu, J.
name: Yuan, X.
name: Yushchenko, O.
name: Zarebski, K. A.
name: Zavertyaev, M.
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Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The decays of $B_s^0$ and $\overline{B}_s^0$ mesons into the $J/ψK^+K^-$ final state are studied in the $K^+K^-$ mass region above the $ϕ(1020)$ meson in order to determine the resonant substructure and measure the $CP$-violating phase, $ϕ_s$, the decay width, $Γ_s$, and the width difference between light and heavy mass eigenstates, $ΔΓ_s$. A decay-time dependent amplitude analysis is employed. The data sample corresponds to an integrated luminosity of $3{\rm fb}^{-1}$ produced in 7 and 8 Tev $pp$ collisions at the LHC, collected by the LHCb experiment. The measurement determines $ϕ_s = 119\pm107\pm34 {\rm \, mrad}$. A combination with previous LHCb measurements using similar decays into the $J/ψπ^+π^-$ and $J/ψϕ(1020)$ final states gives $ϕ_s=1\pm37 {\rm \,mrad}$, consistent with the Standard Model prediction.
description: All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2017-008.html