Model-independent measurement of the CKM angle $γ$ using $B^0 \to D K^{\ast 0}$ decays with $D \to K_{S}^{0} π^{+} π^{-}$ and $K_{S}^{0} K^{+} K^{-}$
Creators: name: Aaij, R.
name: Beteta, C. Abellán
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: Gutierrez, O. Aquines
name: Archilli, F.
name: d'Argent, P.
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: Baesso, C.
name: Baker, S.
name: Baldini, W.
name: Barlow, R. J.
name: Barschel, C.
name: Barsuk, S.
name: Barter, W.
name: Batozskaya, V.
name: Battista, V.
name: Bay, A.
name: Beaucourt, L.
name: Beddow, J.
name: Bedeschi, F.
name: Bediaga, I.
name: Bel, L. J.
name: Bellee, V.
name: Belloli, N.
name: Belyaev, I.
name: Ben-Haim, E.
name: Bencivenni, G.
name: Benson, S.
name: Benton, J.
name: Berezhnoy, A.
name: Bernet, R.
name: Bertolin, A.
name: Betti, F.
name: Bettler, M. -O.
name: van Beuzekom, M.
name: Bifani, S.
name: Billoir, P.
name: Bird, T.
name: Birnkraut, A.
name: Bizzeti, A.
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: Borgheresi, A.
name: Borghi, S.
name: Borisyak, M.
name: Borsato, M.
name: Boubdir, M.
name: Bowcock, T. J. V.
name: Bowen, E.
name: Bozzi, C.
name: Braun, S.
name: Britsch, M.
name: Britton, T.
name: Brodzicka, J.
name: Buchanan, E.
name: Burr, C.
name: Bursche, A.
name: Buytaert, J.
name: Cadeddu, S.
name: Calabrese, R.
name: Calvi, M.
name: Gomez, M. Calvo
name: Campana, P.
name: Perez, D. Campora
name: Capriotti, L.
name: Carbone, A.
name: Carboni, G.
name: Cardinale, R.
name: Cardini, A.
name: Carniti, P.
name: Carson, L.
name: Akiba, K. Carvalho
name: Casse, G.
name: Cassina, L.
name: Garcia, L. Castillo
name: Cattaneo, M.
name: Cauet, Ch.
name: Cavallero, G.
name: Cenci, R.
name: Charles, M.
name: Charpentier, Ph.
name: Chatzikonstantinidis, G.
name: Chefdeville, M.
name: Chen, S.
name: Cheung, S. -F.
name: Chobanova, V.
name: Chrzaszcz, M.
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: Cogoni, V.
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name: Collazuol, G.
name: Collins, P.
name: Comerma-Montells, A.
name: Contu, A.
name: Cook, A.
name: Coquereau, S.
name: Corti, G.
name: Corvo, M.
name: Couturier, B.
name: Cowan, G. A.
name: Craik, D. C.
name: Crocombe, A.
name: Torres, M. Cruz
name: Cunliffe, S.
name: Currie, R.
name: D'Ambrosio, C.
name: Dall'Occo, E.
name: Dalseno, J.
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name: Francisco, O. De Aguiar
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Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: A binned Dalitz plot analysis of the decays $B^0 \to D K^{\ast 0}$, with $D \to K_{S}^{0} π^{+} π^{-}$ and $K_{S}^{0} K^{+} K^{-}$, is performed to measure the observables $x_\pm$ and $y_\pm$, which are related to the CKM angle $γ$ and the hadronic parameters of the decays. The $D$ decay strong phase variation over the Dalitz plot is taken from measurements performed at the CLEO-c experiment, making the analysis independent of the $D$ decay model. With a sample of proton-proton collision data, corresponding to an integrated luminosity of $3.0\,\rm{fb}^{-1}$, collected by the LHCb experiment, the values of the $CP$ violation parameters are found to be $x_+ = 0.05 \pm 0.35 \pm 0.02$, $x_-=-0.31\pm 0.20 \pm 0.04$, $y_+=-0.81\pm 0.28\pm 0.06$ and $y_-=0.31\pm 0.21 \pm 0.05$, where the first uncertainties are statistical and the second systematic. These observables correspond to values $γ$ = $(71 \pm 20)^\circ$, $r_{B^0} = 0.56\pm 0.17$ and $δ_{B^0} = (204\,^{+21}_{-20})^\circ$. The parameters $r_{B^0}$ and $δ_{B^0}$ are the magnitude ratio and strong phase difference between the suppressed and favoured $B^0$ decay amplitudes, and have been measured in a region of $\pm 50$ MeV/$c^2$ around the $K^{\ast}(892)^{0}$ mass and with the magnitude of the cosine of the $K^{\ast}(892)^{0}$ helicity angle larger than 0.4.
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-2016-006.html