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First Observation of CP Violation in B[over ¯]^{0}→D_{CP}^{(*)}h^{0} Decays by a Combined Time-Dependent Analysis of BABAR and Belle Data.

  • Author(s): Abdesselam, A
  • Adachi, I
  • Adametz, A
  • Adye, T
  • Ahmed, H
  • Aihara, H
  • Akar, S
  • Alam, MS
  • Albert, J
  • Al Said, S
  • Andreassen, R
  • Angelini, C
  • Anulli, F
  • Arinstein, K
  • Arnaud, N
  • Asner, DM
  • Aston, D
  • Aulchenko, V
  • Aushev, T
  • Ayad, R
  • Babu, V
  • Badhrees, I
  • Bahinipati, S
  • Bakich, AM
  • Band, HR
  • Banerjee, Sw
  • Barberio, E
  • Bard, DJ
  • Barlow, RJ
  • Batignani, G
  • Beaulieu, A
  • Bellis, M
  • Ben-Haim, E
  • Bernard, D
  • Bernlochner, FU
  • Bettarini, S
  • Bettoni, D
  • Bevan, AJ
  • Bhardwaj, V
  • Bhuyan, B
  • Bianchi, F
  • Biasini, M
  • Biswal, J
  • Blinov, VE
  • Bloom, PC
  • Bobrov, A
  • Bomben, M
  • Bondar, A
  • Bonneaud, GR
  • Bonvicini, G
  • Bozek, A
  • Bozzi, C
  • Bračko, M
  • Briand, H
  • Browder, TE
  • Brown, DN
  • Brown, DN
  • Bünger, C
  • Burchat, PR
  • Buzykaev, AR
  • Calabrese, R
  • Calcaterra, A
  • Calderini, G
  • Carpinelli, M
  • Cartaro, C
  • Casarosa, G
  • Cenci, R
  • Červenkov, D
  • Chang, P
  • Chao, DS
  • Chauveau, J
  • Cheaib, R
  • Chekelian, V
  • Chen, A
  • Chen, C
  • Cheng, CH
  • Cheon, BG
  • Chilikin, K
  • Chistov, R
  • Cho, K
  • Chobanova, V
  • Choi, HHF
  • Choi, S-K
  • Chrzaszcz, M
  • Cibinetto, G
  • Cinabro, D
  • Cochran, J
  • Coleman, JP
  • Contri, R
  • Convery, MR
  • Cowan, G
  • Cowan, R
  • Cremaldi, L
  • Dalseno, J
  • Dasu, S
  • Davier, M
  • Davis, CL
  • De Mori, F
  • De Nardo, G
  • Denig, AG
  • Derkach, D
  • de Sangro, R
  • Dey, B
  • Di Lodovico, F
  • Dingfelder, J
  • Dittrich, S
  • Doležal, Z
  • Dorfan, J
  • Drásal, Z
  • Drutskoy, A
  • Druzhinin, VP
  • Dubois-Felsmann, GP
  • Dunwoodie, W
  • Dutta, D
  • Ebert, M
  • Echenard, B
  • Eidelman, S
  • Eigen, G
  • Eisner, AM
  • Emery, S
  • Ernst, JA
  • Faccini, R
  • Farhat, H
  • Fast, JE
  • Feindt, M
  • Ferber, T
  • Ferrarotto, F
  • Ferroni, F
  • Field, RC
  • Filippi, A
  • Finocchiaro, G
  • Fioravanti, E
  • Flood, KT
  • Ford, WT
  • Forti, F
  • Franco Sevilla, M
  • Fritsch, M
  • Fry, JR
  • Fulsom, BG
  • Gabathuler, E
  • Gabyshev, N
  • Gamba, D
  • Garmash, A
  • Gary, JW
  • Garzia, I
  • Gaspero, M
  • Gaur, V
  • Gaz, A
  • Gershon, TJ
  • Getzkow, D
  • Gillard, R
  • Li Gioi, L
  • Giorgi, MA
  • Glattauer, R
  • Godang, R
  • Goh, YM
  • Goldenzweig, P
  • Golob, B
  • Golubev, VB
  • Gorodeisky, R
  • Gradl, W
  • Graham, MT
  • Grauges, E
  • Griessinger, K
  • Gritsan, AV
  • Grosdidier, G
  • Grünberg, O
  • Guttman, N
  • Haba, J
  • Hafner, A
  • Hamilton, B
  • Hara, T
  • Harrison, PF
  • Hast, C
  • Hayasaka, K
  • Hayashii, H
  • Hearty, C
  • He, XH
  • Hess, M
  • Hitlin, DG
  • Hong, TM
  • Honscheid, K
  • Hou, W-S
  • Hsiung, YB
  • Huard, Z
  • Hutchcroft, DE
  • Iijima, T
  • Inguglia, G
  • Innes, WR
  • Ishikawa, A
  • Itoh, R
  • Iwasaki, Y
  • Izen, JM
  • Jaegle, I
  • Jawahery, A
  • Jessop, CP
  • Joffe, D
  • Joo, KK
  • Julius, T
  • Kang, KH
  • Kass, R
  • Kawasaki, T
  • Kerth, LT
  • Khan, A
  • Kiesling, C
  • Kim, DY
  • Kim, JB
  • Kim, JH
  • Kim, KT
  • Kim, P
  • Kim, SH
  • Kim, YJ
  • King, GJ
  • Kinoshita, K
  • Ko, BR
  • Koch, H
  • Kodyš, P
  • Kolomensky, Yu G
  • Korpar, S
  • Kovalskyi, D
  • Kowalewski, R
  • Kravchenko, EA
  • Križan, P
  • Krokovny, P
  • Kuhr, T
  • Kumar, R
  • Kuzmin, A
  • Kwon, Y-J
  • Lacker, HM
  • Lafferty, GD
  • Lanceri, L
  • Lange, DJ
  • Lankford, AJ
  • Latham, TE
  • Leddig, T
  • Le Diberder, F
  • Lee, DH
  • Lee, IS
  • Lee, MJ
  • Lees, JP
  • Leith, DWGS
  • Leruste, Ph
  • Lewczuk, MJ
  • Lewis, P
  • Libby, J
  • Lockman, WS
  • Long, O
  • Lopes Pegna, D
  • LoSecco, JM
  • Lou, XC
  • Lueck, T
  • Luitz, S
  • Lukin, P
  • Luppi, E
  • Lusiani, A
  • Luth, V
  • Lutz, AM
  • Lynch, G
  • MacFarlane, DB
  • Malaescu, B
  • Mallik, U
  • Manoni, E
  • Marchiori, G
  • Margoni, M
  • Martellotti, S
  • Martinez-Vidal, F
  • Masuda, M
  • Mattison, TS
  • Matvienko, D
  • McKenna, JA
  • Meadows, BT
  • Miyabayashi, K
  • Miyashita, TS
  • Miyata, H
  • Mizuk, R
  • Mohanty, GB
  • Moll, A
  • Monge, MR
  • Moon, HK
  • Morandin, M
  • Muller, DR
  • Mussa, R
  • Nakano, E
  • Nakazawa, H
  • Nakao, M
  • Nanut, T
  • Nayak, M
  • Neal, H
  • Neri, N
  • Nisar, NK
  • Nishida, S
  • Nugent, IM
  • Oberhof, B
  • Ocariz, J
  • Ogawa, S
  • Okuno, S
  • Olaiya, EO
  • Olsen, J
  • Ongmongkolkul, P
  • Onorato, G
  • Onuchin, AP
  • Onuki, Y
  • Ostrowicz, W
  • Oyanguren, A
  • Pakhlova, G
  • Pakhlov, P
  • Palano, A
  • Pal, B
  • Palombo, F
  • Pan, Y
  • Panduro Vazquez, W
  • Paoloni, E
  • Park, CW
  • Park, H
  • Passaggio, S
  • Patel, PM
  • Patrignani, C
  • Patteri, P
  • Payne, DJ
  • Pedlar, TK
  • Peimer, DR
  • Peruzzi, IM
  • Pesántez, L
  • Pestotnik, R
  • Petrič, M
  • Piccolo, M
  • Piemontese, L
  • Piilonen, LE
  • Pilloni, A
  • Piredda, G
  • Playfer, S
  • Poireau, V
  • Porter, FC
  • Posocco, M
  • Prasad, V
  • Prell, S
  • Prepost, R
  • Puccio, EMT
  • Pulliam, T
  • Purohit, MV
  • Pushpawela, BG
  • Rama, M
  • Randle-Conde, A
  • Ratcliff, BN
  • Raven, G
  • Ribežl, E
  • Richman, JD
  • Ritchie, JL
  • Rizzo, G
  • Roberts, DA
  • Robertson, SH
  • Röhrken, M
  • Roney, JM
  • Roodman, A
  • Rossi, A
  • Rostomyan, A
  • Rotondo, M
  • Roudeau, P
  • Sacco, R
  • Sakai, Y
  • Sandilya, S
  • Santelj, L
  • Santoro, V
  • Sanuki, T
  • Sato, Y
  • Savinov, V
  • Schindler, RH
  • Schneider, O
  • Schnell, G
  • Schroeder, T
  • Schubert, KR
  • Schumm, BA
  • Schwanda, C
  • Schwartz, AJ
  • Schwitters, RF
  • Sciacca, C
  • Seiden, A
  • Sekula, SJ
  • Senyo, K
  • Seon, O
  • Serednyakov, SI
  • Sevior, ME
  • Shapkin, M
  • Shebalin, V
  • Shen, CP
  • Shibata, T-A
  • Shiu, J-G
  • Simard, M
  • Simi, G
  • Simon, F
  • Simonetto, F
  • Skovpen, Yu I
  • Smith, AJS
  • Smith, JG
  • Snyder, A
  • So, RY
  • Sobie, RJ
  • Soffer, A
  • Sohn, Y-S
  • Sokoloff, MD
  • Sokolov, A
  • Solodov, EP
  • Solovieva, E
  • Spaan, B
  • Spanier, SM
  • Starič, M
  • Stocchi, A
  • Stroili, R
  • Stugu, B
  • Su, D
  • Sullivan, MK
  • Sumihama, M
  • Sumisawa, K
  • Sumiyoshi, T
  • Summers, DJ
  • Sun, L
  • Tamponi, U
  • Taras, P
  • Tasneem, N
  • Teramoto, Y
  • Tisserand, V
  • Todyshev, K Yu
  • Toki, WH
  • Touramanis, C
  • Trabelsi, K
  • Tsuboyama, T
  • Uchida, M
  • Uglov, T
  • Unno, Y
  • Uno, S
  • Usov, Y
  • Uwer, U
  • Vahsen, SE
  • Van Hulse, C
  • Vanhoefer, P
  • Varner, G
  • Vasseur, G
  • Va'vra, J
  • Verderi, M
  • Vinokurova, A
  • Vitale, L
  • Vorobyev, V
  • Voß, C
  • Wagner, MN
  • Wagner, SR
  • Waldi, R
  • Walsh, JJ
  • Wang, CH
  • Wang, M-Z
  • Wang, P
  • Watanabe, Y
  • West, CA
  • Williams, KM
  • Wilson, FF
  • Wilson, JR
  • Wisniewski, WJ
  • Won, E
  • Wormser, G
  • Wright, DM
  • Wu, SL
  • Wulsin, HW
  • Yamamoto, H
  • Yamaoka, J
  • Yashchenko, S
  • Yuan, CZ
  • Yusa, Y
  • Zallo, A
  • Zhang, CC
  • Zhang, ZP
  • Zhilich, V
  • Zhulanov, V
  • Zupanc, A
  • BaBar Collaboration
  • Belle Collaboration
  • et al.
Abstract

We report a measurement of the time-dependent CP asymmetry of B[over ¯]^{0}→D_{CP}^{(*)}h^{0} decays, where the light neutral hadron h^{0} is a π^{0}, η, or ω meson, and the neutral D meson is reconstructed in the CP eigenstates K^{+}K^{-}, K_{S}^{0}π^{0}, or K_{S}^{0}ω. The measurement is performed combining the final data samples collected at the ϒ(4S) resonance by the BABAR and Belle experiments at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain (471±3)×10^{6} BB[over ¯] pairs recorded by the BABAR detector and (772±11)×10^{6} BB[over ¯] pairs recorded by the Belle detector. We measure the CP asymmetry parameters -η_{f}S=+0.66±0.10(stat)±0.06(syst) and C=-0.02±0.07(stat)±0.03(syst). These results correspond to the first observation of CP violation in B[over ¯]^{0}→D_{CP}^{(*)}h^{0} decays. The hypothesis of no mixing-induced CP violation is excluded in these decays at the level of 5.4 standard deviations.

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