Measurement of $CP$ observables in $B^\pm \to D^{(*)} K^\pm$ and $B^\pm \to D^{(*)} π^\pm$ decays
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: Albero, A. Alfonso
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.
name: Back, J. J.
name: Badalov, A.
name: Baesso, C.
name: Baker, S.
name: Balagura, V.
name: Baldini, W.
name: Baranov, A.
name: Barlow, R. J.
name: Barschel, C.
name: Barsuk, S.
name: Barter, W.
name: Baryshnikov, F.
name: Batozskaya, V.
name: Battista, V.
name: Bay, A.
name: Beaucourt, L.
name: Beddow, J.
name: Bedeschi, F.
name: Bediaga, I.
name: Beiter, A.
name: Bel, L. J.
name: Beliy, N.
name: Bellee, V.
name: Belloli, N.
name: Belous, K.
name: Belyaev, I.
name: Ben-Haim, E.
name: Bencivenni, G.
name: Benson, S.
name: Beranek, S.
name: Berezhnoy, A.
name: Bernet, R.
name: Berninghoff, D.
name: Bertholet, E.
name: Bertolin, A.
name: Betancourt, C.
name: Betti, F.
name: Bettler, M. -O.
name: van Beuzekom, M.
name: Bezshyiko, Ia.
name: Bifani, S.
name: Billoir, P.
name: Birnkraut, A.
name: Bitadze, A.
name: Bizzeti, A.
name: Bjørn, M.
name: Blake, T.
name: Blanc, F.
name: Blouw, J.
name: Blusk, S.
name: Bocci, V.
name: Boettcher, T.
name: Bondar, A.
name: Bondar, N.
name: Bonivento, W.
name: Bordyuzhin, I.
name: Borgheresi, A.
name: Borghi, S.
name: Borisyak, M.
name: Borsato, M.
name: Bossu, F.
name: Boubdir, M.
name: Bowcock, T. J. V.
name: Bowen, E.
name: Bozzi, C.
name: Braun, S.
name: Britton, T.
name: Brodzicka, J.
name: Brundu, D.
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name: Burr, C.
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name: Calvi, M.
name: Gomez, M. Calvo
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name: Campana, P.
name: Perez, D. H. Campora
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name: Carbone, A.
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name: Carniti, P.
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name: Akiba, K. Carvalho
name: Casse, G.
name: Cassina, L.
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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: Measurements of $CP$ observables in $B^\pm \rightarrow D^{(*)} K^\pm$ and $B^\pm \rightarrow D^{(*)} π^\pm$ decays are presented, where $D^{(*)}$ indicates a neutral $D$ or $D^*$ meson that is an admixture of $D^{(*)0}$ and $\bar{D}^{(*)0}$ states. Decays of the $D^*$ meson to the $Dπ^0$ and $Dγ$ final states are partially reconstructed without inclusion of the neutral pion or photon, resulting in distinctive shapes in the $B$ candidate invariant mass distribution. Decays of the $D$ meson are fully reconstructed in the $K^\pm π^\mp$, $K^+ K^-$ and $π^+ π^-$ final states. The analysis uses a sample of charged $B$ mesons produced in $pp$ collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 2.0, 1.0 and 2.0 fb$^{-1}$ taken at centre-of-mass energies of $\sqrt{s}$ = 7, 8 and 13 TeV, respectively. The study of $B^{\pm} \to D^{*} K^{\pm}$ and $B^{\pm} \to D^{*} π^{\pm}$ decays using a partial reconstruction method is the first of its kind, while the measurement of $B^{\pm} \to D K^{\pm}$ and $B^{\pm} \to D π^{\pm}$ decays is an update of previous LHCb measurements. The $B^{\pm} \to D K^{\pm}$ results are the most precise to date.
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-2017-021.html