Measurement of CP violation and constraints on the CKM angle gamma in B-+/- -> DK +/- with D -> K-s(0)pi(+)pi(-) decays

LHCb Collaboration, R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, J. Anderson, R. AndreassenM. Andreotti, J. E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, V. Batozskaya, A. Bay, L. Beaucourt, J. Beddow, Laurence Carson, P. E. L. Clarke, G. A. Cowan, S. Eisenhardt, Silvia Gambetta, F. Muheim, M. Needham, S. Playfer

Research output: Contribution to journalArticlepeer-review


A model-dependent amplitude analysis of B-+/- -> DK +/- with D -> K-s(0)pi(+)pi(-) decays is performed using proton proton collision data, corresponding to an integrated luminosity of 1 fb(-1), recorded by LHCb at a centre-of-mass energy of 7 TeV in 2011. Values of the CP violation observables x +/- and y +/-, which are sensitive to the CKM angle gamma, are measured to be

x- = +0.027 +/- 0.0441(-0.008)(+0.010) +/- 0.001,

y- = +0.013 +/- 0.0481(-0.007)(+0.009) +/- 0.003,

x+ = -0.084 +/- 0.045 +/- 0.009 +/- 0.005,

y+ = -0.032 +/- 0.048(-0.009)(+0.010) +/- 0.008,

where the first uncertainty is statistical, the second systematic and the third arises from the uncertainty of the D -> K-S(0)pi(+)pi(-) amplitude model. The value of gamma is determined to be (84(-42)(+49))degrees including all sources of uncertainty. Neutral D meson mixing is found to have negligible effect. (C) 2014 The Authors. Published by Elsevier B.V.

Original languageEnglish
Article numberAaij:2014iba
Pages (from-to)169-193
Number of pages25
JournalNuclear physics b
Publication statusPublished - Nov 2014




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