Using the entire sample of 467×106 Υ(4S)→BB̄ decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at the SLAC National Accelerator Laboratory, we perform an analysis of B±→DK± decays, using decay modes in which the neutral D meson decays to either CP-eigenstates or non-CP-eigenstates. We measure the partial decay rate charge asymmetries for CP-even and CP-odd D final states to be A CP+=0.25±0.06±0.02 and ACP-=-0.09±0. 07±0.02, respectively, where the first error is the statistical and the second is the systematic uncertainty. The parameter ACP+ is different from zero with a significance of 3.6 standard deviations, constituting evidence for direct CP violation. We also measure the ratios of the charged-averaged B partial decay rates in CP and non-CP decays, RCP+=1.18±0. 09±0.05 and RCP-=1.07±0.08±0.04. We infer frequentist confidence intervals for the angle γ of the unitarity triangle, for the strong phase difference δB, and for the amplitude ratio rB, which are related to the B-→DK- decay amplitude by rBei(δB-γ)=A(B-→D̄0K-)/ A(B-→D0K-). Including statistical and systematic uncertainties, we obtain 0.24<0.45 (0.06<0.51) and, modulo 180°, 11.3°<22.7° or 80.8°<99.2° or 157.3°<168.7° (7.0°<173.0°) at the 68% (95%) confidence level.

Sanchez, P., Lees, J., Poireau, V., Prencipe, E., Tisserand, V., Tico, J., et al. (2010). Measurement of CP observables in B±→DCPK± decays and constraints on the CKM angle γ. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 82(7) [10.1103/PhysRevD.82.072004].

Measurement of CP observables in B±→DCPK± decays and constraints on the CKM angle γ

CARPINELLI, Massimo;
2010

Abstract

Using the entire sample of 467×106 Υ(4S)→BB̄ decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at the SLAC National Accelerator Laboratory, we perform an analysis of B±→DK± decays, using decay modes in which the neutral D meson decays to either CP-eigenstates or non-CP-eigenstates. We measure the partial decay rate charge asymmetries for CP-even and CP-odd D final states to be A CP+=0.25±0.06±0.02 and ACP-=-0.09±0. 07±0.02, respectively, where the first error is the statistical and the second is the systematic uncertainty. The parameter ACP+ is different from zero with a significance of 3.6 standard deviations, constituting evidence for direct CP violation. We also measure the ratios of the charged-averaged B partial decay rates in CP and non-CP decays, RCP+=1.18±0. 09±0.05 and RCP-=1.07±0.08±0.04. We infer frequentist confidence intervals for the angle γ of the unitarity triangle, for the strong phase difference δB, and for the amplitude ratio rB, which are related to the B-→DK- decay amplitude by rBei(δB-γ)=A(B-→D̄0K-)/ A(B-→D0K-). Including statistical and systematic uncertainties, we obtain 0.24<0.45 (0.06<0.51) and, modulo 180°, 11.3°<22.7° or 80.8°<99.2° or 157.3°<168.7° (7.0°<173.0°) at the 68% (95%) confidence level.
Articolo in rivista - Articolo scientifico
BABAR detector
English
Sanchez, P., Lees, J., Poireau, V., Prencipe, E., Tisserand, V., Tico, J., et al. (2010). Measurement of CP observables in B±→DCPK± decays and constraints on the CKM angle γ. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 82(7) [10.1103/PhysRevD.82.072004].
Sanchez, P; Lees, J; Poireau, V; Prencipe, E; Tisserand, V; Tico, J; Grauges, E; Martinelli, M; Palano, A; Pappagallo, M; Eigen, G; Stugu, B; Sun, L; Battaglia, M; Brown, D; Hooberman, B; Kerth, L; Kolomensky, Y; Lynch, G; Osipenkov, I; Tanabe, T; Hawkes, C; Watson, A; Koch, H; Schroeder, T; Asgeirsson, D; Hearty, C; Mattison, T; Mckenna, J; Khan, A; Randle Conde, A; Blinov, V; Buzykaev, A; Druzhinin, V; Golubev, V; Onuchin, A; Serednyakov, S; Skovpen, Y; Solodov, E; Todyshev, K; Yushkov, A; Bondioli, M; Curry, S; Kirkby, D; Lankford, A; Mandelkern, M; Martin, E; Stoker, D; Atmacan, H; Gary, J; Liu, F; Long, O; Vitug, G; Campagnari, C; Hong, T; Kovalskyi, D; Richman, J; Eisner, A; Heusch, C; Kroseberg, J; Lockman, W; Martinez, A; Schalk, T; Schumm, B; Seiden, A; Winstrom, L; Cheng, C; Doll, D; Echenard, B; Hitlin, D; Ongmongkolkul, P; Porter, F; Rakitin, A; Andreassen, R; Dubrovin, M; Mancinelli, G; Meadows, B; Sokoloff, M; Bloom, P; Ford, W; Gaz, A; Nagel, M; Nauenberg, U; Smith, J; Wagner, S; Ayad, R; Toki, W; Jasper, H; Karbach, T; Merkel, J; Petzold, A; Spaan, B; Wacker, K; Kobel, M; Schubert, K; Schwierz, R; Bernard, D; Verderi, M; Clark, P; Playfer, S; Watson, J; Andreotti, M; Bettoni, D; Bozzi, C; Calabrese, R; Cecchi, A; Cibinetto, G; Fioravanti, E; Franchini, P; Luppi, E; Munerato, M; Negrini, M; Petrella, A; Piemontese, L; Baldini Ferroli, R; Calcaterra, A; de Sangro, R; Finocchiaro, G; Nicolaci, M; Pacetti, S; Patteri, P; Peruzzi, I; Piccolo, M; Rama, M; Zallo, A; Contri, R; Guido, E; Lo Vetere, M; Monge, M; Passaggio, S; Patrignani, C; Robutti, E; Tosi, S; Bhuyan, B; Prasad, V; Lee, C; Morii, M; Adametz, A; Marks, J; Schenk, S; Uwer, U; Bernlochner, F; Ebert, M; Lacker, H; Lueck, T; Volk, A; Dauncey, P; Tibbetts, M; Behera, P; Mallik, U; Chen, C; Cochran, J; Crawley, H; Dong, L; Meyer, W; Prell, S; Rosenberg, E; Rubin, A; Gao, Y; Gritsan, A; Guo, Z; Arnaud, N; Davier, M; Derkach, D; da Costa, J; Grosdidier, G; Le Diberder, F; Lutz, A; Malaescu, B; Perez, A; Roudeau, P; Schune, M; Serrano, J; Sordini, V; Stocchi, A; Wang, L; Wormser, G; Lange, D; Wright, D; Bingham, I; Chavez, C; Coleman, J; Fry, J; Gabathuler, E; Gamet, R; Hutchcroft, D; Payne, D; Touramanis, C; Bevan, A; Di Lodovico, F; Sacco, R; Sigamani, M; Cowan, G; Paramesvaran, S; Wren, A; Brown, D; Davis, C; Denig, A; Fritsch, M; Gradl, W; Hafner, A; Alwyn, K; Bailey, D; Barlow, R; Jackson, G; Lafferty, G; West, T; Anderson, J; Cenci, R; Jawahery, A; Roberts, D; Simi, G; Tuggle, J; Dallapiccola, C; Salvati, E; Cowan, R; Dujmic, D; Fisher, P; Sciolla, G; Zhao, M; Lindemann, D; Patel, P; Robertson, S; Schram, M; Biassoni, P; Lazzaro, A; Lombardo, V; Palombo, F; Stracka, S; Cremaldi, L; Godang, R; Kroeger, R; Sonnek, P; Summers, D; Nguyen, X; Simard, M; Taras, P; De Nardo, G; Monorchio, D; Onorato, G; Sciacca, C; Raven, G; Snoek, H; Jessop, C; Knoepfel, K; Losecco, J; Wang, W; Corwin, L; Honscheid, K; Kass, R; Morris, J; Rahimi, A; Blount, N; Brau, J; Frey, R; Igonkina, O; Kolb, J; Rahmat, R; Sinev, N; Strom, D; Strube, J; Torrence, E; Castelli, G; Feltresi, E; Gagliardi, N; Margoni, M; Morandin, M; Posocco, M; Rotondo, M; Simonetto, F; Stroili, R; Ben Haim, E; Bonneaud, G; Briand, H; Calderini, G; Chauveau, J; Hamon, O; Leruste, P; Marchiori, G; Ocariz, J; Prendki, J; Sitt, S; Biasini, M; Manoni, E; Rossi, A; Angelini, C; Batignani, G; Bettarini, S; Carpinelli, M; Casarosa, G; Cervelli, A; Forti, F; Giorgi, M; Lusiani, A; Neri, N; Paoloni, E; Rizzo, G; Walsh, J; Pegna, D; Lu, C; Olsen, J; Smith, A; Telnov, A; Anulli, F; Baracchini, E; Cavoto, G; Faccini, R; Ferrarotto, F; Ferroni, F; Gaspero, M; Gioi, L; Mazzoni, M; Piredda, G; Renga, F; Hartmann, T; Leddig, T; Schroder, H; Waldi, R; Adye, T; Franek, B; Olaiya, E; Wilson, F; Emery, S; de Monchenault, G; Vasseur, G; Yeche, C; Zito, M; Allen, M; Aston, D; Bard, D; Bartoldus, R; Benitez, J; Cartaro, C; Convery, M; Dorfan, J; Dubois Felsmann, G; Dunwoodie, W; Field, R; Sevilla, M; Fulsom, B; Gabareen, A; Graham, M; Grenier, P; Hast, C; Innes, W; Kelsey, M; Kim, H; Kim, P; Kocian, M; Leith, D; Li, S; Lindquist, B; Luitz, S; Luth, V; Lynch, H; Macfarlane, D; Marsiske, H; Muller, D; Neal, H; Nelson, S; O'Grady, C; Ofte, I; Perl, M; Pulliam, T; Ratcliff, B; Roodman, A; Salnikov, A; Santoro, V; Schindler, R; Schwiening, J; Snyder, A; Su, D; Sullivan, M; Sun, S; Suzuki, K; Thompson, J; Va'Vra, J; Wagner, A; Weaver, M; West, C; Wisniewski, W; Wittgen, M; Wright, D; Wulsin, H; Yarritu, A; Young, C; Ziegler, V; Chen, X; Park, W; Purohit, M; White, R; Wilson, J; Sekula, S; Bellis, M; Burchat, P; Edwards, A; Miyashita, T; Ahmed, S; Alam, M; Ernst, J; Pan, B; Saeed, M; Zain, S; Guttman, N; Soffer, A; Lund, P; Spanier, S; Eckmann, R; Ritchie, J; Ruland, A; Schilling, C; Schwitters, R; Wray, B; Izen, J; Lou, X; Bianchi, F; Gamba, D; Pelliccioni, M; Bomben, M; Lanceri, L; Vitale, L; Lopez March, N; Martinez Vidal, F; Milanes, D; Oyanguren, A; Albert, J; Banerjee, S; Choi, H; Hamano, K; King, G; Kowalewski, R; Lewczuk, M; Nugent, I; Roney, J; Sobie, R; Gershon, T; Harrison, P; Latham, T; Puccio, E; Band, H; Dasu, S; Flood, K; Pan, Y; Prepost, R; Vuosalo, C; Wu, S
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