Measurement of CP violation and constraints on the CKM angle gamma in B-+ /-- > DK + /-with D-> Ks ( 0 ) pi ( + ) pi (-) decays
T. Ketel, B. Khanji, C. Khurewathanakul, S. Klaver, O. Kochebina, M. Kolpin, I. Komarov, R. F. Koopman, P. Koppenburg, M. Korolev, A. Kozlinskiy, L. Kravchuk, K. Kreplin, M. Kreps, G. Krocker, P. Krokovny, F. Kruse, M. Kucharczyk, V. Kudryavtsev, K. Kurek, T. Kvaratskheliya, D. Lacarrere, G. Lafferty, A. Lai, D. Lambert, E. Lanciotti, G. Lanfranchi, C. Langenbruch, B. Langhans, T. Latham, C. Lazzeroni,J. van Leerdam, R. Lefèvre, A. Leflat, J. Lefrançois, S. Leo, O. Leroy, T. Lesiak, B. Leverington, M. Liles, R. Lindner, C. Linn, F. Lionetto, B. Liu, G. Liu, S. Lohn, I. Longstaff,J. H. Lopes, P. Lowdon, H. Lu, D. Lucchesi, H. Luo, A. Lupato, E. Luppi,O. Lupton, F. Machefert, I. V. Machikhiliyan, F. Maciuc, O. Maev, S. Malde, G. Manca, A. Mapelli, J. Maratas,C. Marin Benito, P. Marino, R. Märki, J. Marks, G. Martellotti, A. Martens,A. Martín Sánchez, M. Martinelli,D. Martinez Santos,F. Martinez Vidal,D. Martins Tostes, A. Massafferri, R. Matev, Z. Mathe, C. Matteuzzi, A. Mazurov, M. McCann, J. McCarthy, A. McNab, B. McSkelly, B. Meadows, F. Meier, M. Meissner, N. Moggi,J. Molina Rodriguez, S. Monteil, M. Morandin, P. Morawski, A. Mordà, R. Muresan, M. Mussini, P. Naik, T. Nakada, R. Nandakumar, I. Nasteva, M. Needham, N. Neri, S. Neubert, N. Neufeld, M. Nicol,V. Niess, R. Niet, N. Nikitin, T. Nikodem, A. Novoselov, A. Oblakowska-Mucha, V. Obraztsov, S. Oggero, S. Ogilvy, O. Okhrimenko, R. Oldeman, M. Orlandea,J. M. Otalora Goicochea, P. Owen, A. Oyanguren, A. Palano, F. Palombo, M. Palutan, J. Panman, A. Papanestis, M. Pappagallo, C. Parkes, G. Passaleva, G. D. Patel, M. Patel, C. Patrignani,A. Pazos Alvarez, A. Pearce, A. Pellegrino,M. Pepe Altarelli semanticscholar（2014）
摘要
A model-dependent amplitude analysis of B± → DK± with D → K0 Sπ+π− 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 γ, are measured to be x− = +0.027 ± 0.044+0.010 −0.008 ± 0.001, y− = +0.013 ± 0.048+0.009 −0.007 ± 0.003, x+ = −0.084 ± 0.045 ± 0.009 ± 0.005, y+ = −0.032 ± 0.048+0.010 −0.009 ± 0.008, where the first uncertainty is statistical, the second systematic and the third arises from the uncertainty of the D → K0 Sπ+π− amplitude model. The value of γ is determined to be (84+49 −42)◦, including all sources of uncertainty. Neutral D meson mixing is found to have negligible effect. © 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/). Funded by SCOAP3.
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