We report measurements of sin2β and cos2β using a time-dependent Dalitz plot analysis of B0→D(∗)h0 with D→KS0π+π- decays, where the light unflavored and neutral hadron h0 is a π0, η, or ω meson. The analysis uses a combination of the final data sets of the BaBar and Belle experiments containing 471×106 and 772×106 BB pairs collected at the (4S) resonance at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. We measure sin2β=0.80±0.14(stat)±0.06(syst)±0.03(model) and cos2β=0.91±0.22(stat)±0.09(syst)±0.07(model). The result for the direct measurement of the angle is β=(22.5±4.4(stat)±1.2(syst)±0.6(model))°. The last quoted uncertainties are due to the composition of the D0→KS0π+π- decay amplitude model, which is newly established by a Dalitz plot amplitude analysis of a high-statistics e+e-→cc data sample as part of this analysis. We find the first evidence for cos2β>0 at the level of 3.7 standard deviations. The measurement excludes the trigonometric multifold solution π/2-β=(68.1±0.7)° at the level of 7.3 standard deviations and therefore resolves an ambiguity in the determination of the apex of the CKM Unitarity Triangle. The hypothesis of β=0° is ruled out at the level of 5.1 standard deviations, and thus CP violation is observed in B0→D(∗)h0 decays. The measurement assumes no direct CP violation in B0→D(∗)h0 decays.

Adachi, I., Adye, T., Ahmed, H., Ahn, J., Aihara, H., Akar, S., et al. (2018). Measurement of cos2β in B0 →d (∗)h0 with D → KS0 π+π- decays by a combined time-dependent Dalitz plot analysis of B a B ar and Belle data. PHYSICAL REVIEW D, 98(11) [10.1103/PhysRevD.98.112012].

Measurement of cos2β in B0 →d (∗)h0 with D → KS0 π+π- decays by a combined time-dependent Dalitz plot analysis of B a B ar and Belle data

Carpinelli M.
Membro del Collaboration Group
;
2018

Abstract

We report measurements of sin2β and cos2β using a time-dependent Dalitz plot analysis of B0→D(∗)h0 with D→KS0π+π- decays, where the light unflavored and neutral hadron h0 is a π0, η, or ω meson. The analysis uses a combination of the final data sets of the BaBar and Belle experiments containing 471×106 and 772×106 BB pairs collected at the (4S) resonance at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. We measure sin2β=0.80±0.14(stat)±0.06(syst)±0.03(model) and cos2β=0.91±0.22(stat)±0.09(syst)±0.07(model). The result for the direct measurement of the angle is β=(22.5±4.4(stat)±1.2(syst)±0.6(model))°. The last quoted uncertainties are due to the composition of the D0→KS0π+π- decay amplitude model, which is newly established by a Dalitz plot amplitude analysis of a high-statistics e+e-→cc data sample as part of this analysis. We find the first evidence for cos2β>0 at the level of 3.7 standard deviations. The measurement excludes the trigonometric multifold solution π/2-β=(68.1±0.7)° at the level of 7.3 standard deviations and therefore resolves an ambiguity in the determination of the apex of the CKM Unitarity Triangle. The hypothesis of β=0° is ruled out at the level of 5.1 standard deviations, and thus CP violation is observed in B0→D(∗)h0 decays. The measurement assumes no direct CP violation in B0→D(∗)h0 decays.
Articolo in rivista - Articolo scientifico
Scientifica
CP-VIOLATION; DETECTOR; ENERGY; TOOL;
English
Carpinelli Massimo (BaBar Collaboration, Belle Collaboration)
Adachi, I., Adye, T., Ahmed, H., Ahn, J., Aihara, H., Akar, S., et al. (2018). Measurement of cos2β in B0 →d (∗)h0 with D → KS0 π+π- decays by a combined time-dependent Dalitz plot analysis of B a B ar and Belle data. PHYSICAL REVIEW D, 98(11) [10.1103/PhysRevD.98.112012].
Adachi, I; Adye, T; Ahmed, H; Ahn, J; Aihara, H; Akar, S; Alam, M; Albert, J; Anulli, F; Arnaud, N; Asner, D; Aston, D; Atmacan, H; Aushev, T; Ayad, R; Badhrees, I; Bakich, A; Banerjee, S; Bansal, V; Barlow, R; Batignani, G; Beaulieu, A; Behera, P; Bellis, M; Ben-Haim, E; Bernard, D; Bernlochner, F; Bettarini, S; Bettoni, D; Bevan, A; Bhardwaj, V; Bhuyan, B; Bianchi, F; Biasini, M; Biswal, J; Blinov, V; Bomben, M; Bondar, A; Bonneaud, G; Bozek, A; Bozzi, C; Bracko, M; Browder, T; Brown, D; Brown, D; Bunger, C; Burchat, P; Buzykaev, A; Calabrese, R; Calcaterra, A; Calderini, G; Di Carlo, S; Carpinelli, M; Cartaro, C; Casarosa, G; Cenci, R; Chao, D; Chauveau, J; Cheaib, R; Chen, A; Chen, C; Cheng, C; Cheon, B; Chilikin, K; Cho, K; Choi, Y; Choudhury, S; Chrzaszcz, M; Cibinetto, G; Cinabro, D; Cochran, J; Coleman, J; Convery, M; Cowan, G; Cowan, R; Cremaldi, L; Cunliffe, S; Dash, N; Davier, M; Davis, C; De Mori, F; De Nardo, G; Denig, A; De Sangro, R; Dey, B; Di Lodovico, F; Dittrich, S; Dolezal, Z; Dorfan, J; Drasal, Z; Druzhinin, V; Dunwoodie, W; Ebert, M; Echenard, B; Eidelman, S; Eigen, G; Eisner, A; Emery, S; Epifanov, D; Ernst, J; Faccini, R; Fast, J; Feindt, M; Ferrarotto, F; Ferroni, F; Field, R; Filippi, A; Finocchiaro, G; Fioravanti, E; Flood, K; Forti, F; Fritsch, M; Fulsom, B; Gabathuler, E; Gamba, D; Garg, R; Garmash, A; Gary, J; Garzia, I; Gaur, V; Gaz, A; Gelb, M; Gershon, T; Li Gioi, L; Giorgi, M; Giri, A; Godang, R; Goldenzweig, P; Golob, B; Golubev, V; Gorodeisky, R; Gradl, W; Graham, M; Grauges, E; Griessinger, K; Gritsan, A; Grunberg, O; Guido, E; Guttman, N; Hafner, A; Hara, T; Harrison, P; Hast, C; Hayasaka, K; Hearty, C; Heck, M; Hedges, M; Hess, M; Hirose, S; Hitlin, D; Honscheid, K; Hou, W; Huard, Z; Van Hulse, C; Hutchcroft, D; Inami, K; Inguglia, G; Innes, W; Ishikawa, A; Itoh, R; Iwasaki, M; Iwasaki, Y; Izen, J; Jacobs, W; Jawahery, A; Jessop, C; Jia, S; Jin, Y; Joo, K; Julius, T; Kaliyar, A; Kang, K; Karyan, G; Kass, R; Kichimi, H; Kim, D; Kim, J; Kim, K; Kim, S; Kim, J; Kim, P; King, G; Kinoshita, K; Koch, H; Kodys, P; Kolomensky, Y; Korpar, S; Kotchetkov, D; Kowalewski, R; Kravchenko, E; Krizan, P; Kroeger, R; Krokovny, P; Kuhr, T; Kulasiri, R; Kuzmin, A; Kwon, Y; Lacker, H; Lafferty, G; Lanceri, L; Lange, J; Lange, D; Lankford, A; Latham, T; Leddig, T; Le Diberder, F; Lee, I; Lee, S; Lees, J; Leith, D; Li, L; Li, Y; Li, Y; Libby, J; Liventsev, D; Lockman, W; Long, O; Losecco, J; Lou, X; Lubej, M; Lueck, T; Luitz, S; Luo, T; Luppi, E; Lusiani, A; Lutz, A; Macfarlane, D; Macnaughton, J; Mallik, U; Manoni, E; Marchiori, G; Margoni, M; Martellotti, S; Martinez-Vidal, F; Masuda, M; Matsuda, T; Mattison, T; Matvienko, D; Mckenna, J; Meadows, B; Merola, M; Miyabayashi, K; Miyashita, T; Miyata, H; Mizuk, R; Mohanty, G; Mori, T; Muller, D; Muller, T; Mussa, R; Nakano, E; Nakao, M; Nanut, T; Nath, K; Nayak, M; Neal, H; Neri, N; Nisar, N; Nishida, S; Nugent, I; Oberhof, B; Ocariz, J; Ogawa, S; Ongmongkolkul, P; Ono, H; Onuchin, A; Oyanguren, A; Pakhlov, P; Pakhlova, G; Pal, B; Palano, A; Palombo, F; Panduro Vazquez, W; Paoloni, E; Pardi, S; Park, H; Passaggio, S; Patrignani, C; Patteri, P; Paul, S; Pavelkin, I; Payne, D; Pedlar, T; Peimer, D; Peruzzi, I; Piccolo, M; Piilonen, L; Pilloni, A; Piredda, G; Poireau, V; Porter, F; Posocco, M; Prell, S; Prepost, R; Puccio, E; Purohit, M; Pushpawela, B; Rama, M; Randle-Conde, A; Ratcliff, B; Raven, G; Resmi, P; Ritchie, J; Ritter, M; Rizzo, G; Roberts, D; Robertson, S; Rohrken, M; Roney, J; Roodman, A; Rossi, A; Rotondo, M; Rozanska, M; Russo, G; Sacco, R; Al Said, S; Sakai, Y; Sandilya, S; Santelj, L; Santoro, V; Sanuki, T; Savinov, V; Schneider, O; Schnell, G; Schroeder, T; Schubert, K; Schwanda, C; Schwartz, A; Schwitters, R; Sciacca, C; Seddon, R; Seino, Y; Sekula, S; Senyo, K; Seon, O; Serednyakov, S; Sevior, M; Shebalin, V; Shibata, T; Shimizu, N; Shiu, J; Simi, G; Simon, F; Simonetto, F; Skovpen, Y; Smith, J; Smith, A; So, R; Sobie, R; Soffer, A; Sokoloff, M; Solodov, E; Solovieva, E; Spanier, S; Staric, M; Stroili, R; Sullivan, M; Sumisawa, K; Sumiyoshi, T; Summers, D; Sun, L; Takizawa, M; Tamponi, U; Tanida, K; Taras, P; Tasneem, N; Tenchini, F; Tisserand, V; Todyshevx, K; Touramanis, C; Uchida, M; Uglov, T; Unno, Y; Uno, S; Vahsen, S; Varner, G; Vasseur, G; Va'Vra, J; Cervenkov, D; Verderi, M; Vitale, L; Vorobyev, V; Voss, C; Wagner, S; Waheed, E; Waldi, R; Walsh, J; Wang, B; Wang, C; Wang, M; Wang, P; Wilson, F; Wilson, J; Wisniewski, W; Won, E; Wormser, G; Wright, D; Wu, S; Yuan, C; Yusa, Y; Zakharov, S; Zallo, A; Zani, L; Zhang, Z; Zhilich, V; Zhukova, V; Zhulanov, V; Zupanc, A
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