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Observation of CP violation in the B(0) meson system.

  • Author(s): Aubert, B
  • Boutigny, D
  • Gaillard, JM
  • Hicheur, A
  • Karyotakis, Y
  • Lees, JP
  • Robbe, P
  • Tisserand, V
  • Palano, A
  • Chen, GP
  • Chen, JC
  • Qi, ND
  • Rong, G
  • Wang, P
  • Zhu, YS
  • Eigen, G
  • Reinertsen, PL
  • Stugu, B
  • Abbott, B
  • Abrams, GS
  • Borgland, AW
  • Breon, AB
  • Brown, DN
  • Button-Shafer, J
  • Cahn, RN
  • Clark, AR
  • Gill, MS
  • Gritsan, AV
  • Groysman, Y
  • Jacobsen, RG
  • Kadel, RW
  • Kadyk, J
  • Kerth, LT
  • Kluth, S
  • Kolomensky, YG
  • Kral, JF
  • LeClerc, C
  • Levi, ME
  • Liu, T
  • Lynch, G
  • Meyer, AB
  • Momayezi, M
  • Oddone, PJ
  • Perazzo, A
  • Pripstein, M
  • Roe, NA
  • Romosan, A
  • Ronan, MT
  • Shelkov, VG
  • Telnov, AV
  • Wenzel, WA
  • Zisman, MS
  • Bright-Thomas, PG
  • Harrison, TJ
  • Hawkes, CM
  • Knowles, DJ
  • O'Neale, SW
  • Penny, RC
  • Watson, AT
  • Watson, NK
  • Deppermann, T
  • Goetzen, K
  • Koch, H
  • Krug, J
  • Kunze, M
  • Lewandowski, B
  • Peters, K
  • Schmuecker, H
  • Steinke, M
  • Andress, JC
  • Barlow, NR
  • Bhimji, W
  • Chevalier, N
  • Clark, PJ
  • Cottingham, WN
  • De Groot, N
  • Dyce, N
  • Foster, B
  • McFall, JD
  • Wallom, D
  • Wilson, FF
  • Abe, K
  • Hearty, C
  • Mattison, TS
  • McKenna, JA
  • Thiessen, D
  • Jolly, S
  • McKemey, AK
  • Tinslay, J
  • Blinov, VE
  • Bukin, AD
  • Bukin, DA
  • Buzykaev, AR
  • Golubev, VB
  • Ivanchenko, VN
  • Korol, AA
  • Kravchenko, EA
  • Onuchin, AP
  • Salnikov, AA
  • Serednyakov, SI
  • Skovpen, YI
  • Telnov, VI
  • Yushkov, AN
  • Best, D
  • Lankford, AJ
  • Mandelkern, M
  • McMahon, S
  • Stoker, DP
  • Ahsan, A
  • Arisaka, K
  • Buchanan, C
  • Chun, S
  • Branson, JG
  • MacFarlane, DB
  • Prell, S
  • Rahatlou, S
  • Raven, G
  • Sharma, V
  • Campagnari, C
  • Dahmes, B
  • Hart, PA
  • Kuznetsova, N
  • Levy, SL
  • Long, O
  • Lu, A
  • Richman, JD
  • Verkerke, W
  • Witherell, M
  • Yellin, S
  • Beringer, J
  • Dorfan, DE
  • Eisner, AM
  • Frey, A
  • Grillo, AA
  • Grothe, M
  • Heusch, CA
  • Johnson, RP
  • Kroeger, W
  • Lockman, WS
  • Pulliam, T
  • Sadrozinski, H
  • Schalk, T
  • Schmitz, RE
  • Schumm, BA
  • Seiden, A
  • Turri, M
  • Walkowiak, W
  • Williams, DC
  • Wilson, MG
  • Chen, E
  • Dubois-Felsmann, GP
  • Dvoretskii, A
  • Hitlin, DG
  • Metzler, S
  • Oyang, J
  • Porter, FC
  • Ryd, A
  • Samuel, A
  • Weaver, M
  • Yang, S
  • Zhu, RY
  • Devmal, S
  • Geld, TL
  • Jayatilleke, S
  • Mancinelli, G
  • Meadows, BT
  • Sokoloff, MD
  • Barillari, T
  • Bloom, P
  • Dima, MO
  • Fahey, S
  • Ford, WT
  • Johnson, DR
  • Nauenberg, U
  • Olivas, A
  • Park, H
  • Rankin, P
  • Roy, J
  • Sen, S
  • Smith, JG
  • van Hoek, WC
  • Wagner, DL
  • Blouw, J
  • Harton, JL
  • Krishnamurthy, M
  • Soffer, A
  • Toki, WH
  • Wilson, RJ
  • Zhang, J
  • Brandt, T
  • Brose, J
  • Colberg, T
  • Dahlinger, G
  • Dickopp, M
  • Dubitzky, RS
  • Hauke, A
  • Maly, E
  • Müller-Pfefferkorn, R
  • Otto, S
  • Schubert, KR
  • Schwierz, R
  • Spaan, B
  • Wilden, L
  • Behr, L
  • Bernard, D
  • Bonneaud, GR
  • Brochard, F
  • Cohen-Tanugi, J
  • Ferrag, S
  • Roussot, E
  • T'Jampens, S
  • Thiebaux, C
  • Vasileiadis, G
  • Verderi, M
  • Anjomshoaa, A
  • Bernet, R
  • Khan, A
  • Lavin, D
  • Muheim, F
  • Playfer, S
  • Swain, JE
  • Falbo, M
  • Borean, C
  • Bozzi, C
  • Dittongo, S
  • Folegani, M
  • Piemontese, L
  • Treadwell, E
  • Anulli, F
  • Baldini-Ferroli, R
  • Calcaterra, A
  • de Sangro, R
  • Falciai, D
  • Finocchiaro, G
  • Patteri, P
  • Peruzzi, IM
  • Piccolo, M
  • Xie, Y
  • Zallo, A
  • Bagnasco, S
  • Buzzo, A
  • Contri, R
  • Crosetti, G
  • Fabbricatore, P
  • Farinon, S
  • Lo Vetere, M
  • Macri, M
  • Monge, MR
  • Musenich, R
  • Pallavicini, M
  • Parodi, R
  • Passaggio, S
  • Pastore, FC
  • Patrignani, C
  • Pia, MG
  • Priano, C
  • Robutti, E
  • Santroni, A
  • Morii, M
  • Bartoldus, R
  • Dignan, T
  • Hamilton, R
  • Mallik, U
  • Cochran, J
  • Crawley, HB
  • Fischer, PA
  • Lamsa, J
  • Meyer, WT
  • Rosenberg, EI
  • Benkebil, M
  • Grosdidier, G
  • Hast, C
  • Höcker, A
  • Lacker, HM
  • Laplace, S
  • Lepeltier, V
  • Lutz, AM
  • Plaszczynski, S
  • Schune, MH
  • Trincaz-Duvoid, S
  • Valassi, A
  • Wormser, G
  • Bionta, RM
  • Brigljević, V
  • Lange, DJ
  • Mugge, M
  • Shi, X
  • van Bibber, K
  • Wenaus, TJ
  • Wright, DM
  • Wuest, CR
  • Carroll, M
  • Fry, JR
  • Gabathuler, E
  • Gamet, R
  • George, M
  • Kay, M
  • Payne, DJ
  • Sloane, RJ
  • Touramanis, C
  • Aspinwall, ML
  • Bowerman, DA
  • Dauncey, PD
  • Egede, U
  • Eschrich, I
  • Gunawardane, NJ
  • Nash, JA
  • Sanders, P
  • Smith, D
  • Azzopardi, DE
  • Back, JJ
  • Dixon, P
  • Harrison, PF
  • Potter, RJ
  • Shorthouse, HW
  • Strother, P
  • Vidal, PB
  • Williams, MI
  • Cowan, G
  • George, S
  • Green, MG
  • Kurup, A
  • Marker, CE
  • McGrath, P
  • McMahon, TR
  • Ricciardi, S
  • Salvatore, F
  • Scott, I
  • Vaitsas, G
  • Brown, D
  • Davis, CL
  • Allison, J
  • Barlow, RJ
  • Boyd, JT
  • Forti, AC
  • Fullwood, J
  • Jackson, F
  • Lafferty, GD
  • Savvas, N
  • Simopoulos, ET
  • Weatherall, JH
  • Farbin, A
  • Jawahery, A
  • Lillard, V
  • Olsen, J
  • Roberts, DA
  • Schieck, JR
  • Blaylock, G
  • Dallapiccola, C
  • Flood, KT
  • Hertzbach, SS
  • Kofler, R
  • Moore, TB
  • Staengle, H
  • Willocq, S
  • Brau, B
  • Cowan, R
  • Sciolla, G
  • Taylor, F
  • Yamamoto, RK
  • Milek, M
  • Patel, PM
  • Trischuk, J
  • Lanni, F
  • Palombo, F
  • Bauer, JM
  • Booke, M
  • Cremaldi, L
  • Eschenburg, V
  • Kroeger, R
  • Reidy, J
  • Sanders, DA
  • Summers, DJ
  • Martin, JP
  • Nief, JY
  • Seitz, R
  • Taras, P
  • Zacek, V
  • Nicholson, H
  • Sutton, CS
  • Cartaro, C
  • Cavallo, N
  • De Nardo, G
  • Fabozzi, F
  • Gatto, C
  • Lista, L
  • Paolucci, P
  • Piccolo, D
  • Sciacca, C
  • LoSecco, JM
  • Alsmiller, JR
  • Gabriel, TA
  • Handler, T
  • Brau, J
  • Frey, R
  • Iwasaki, M
  • Sinev, NB
  • Strom, D
  • Colecchia, F
  • Dal Corso, F
  • Dorigo, A
  • Galeazzi, F
  • Margoni, M
  • Michelon, G
  • Morandin, M
  • Posocco, M
  • Rotondo, M
  • Simonetto, F
  • Stroili, R
  • Torassa, E
  • Voci, C
  • Benayoun, M
  • Briand, H
  • Chauveau, J
  • David, P
  • de La Vaissière, C
  • Del Buono, L
  • Hamon, O
  • Le Diberder, F
  • Leruste, P
  • Lory, J
  • Roos, L
  • Stark, J
  • Versillé, S
  • Manfredi, PF
  • Re, V
  • Speziali, V
  • Frank, ED
  • Gladney, L
  • Guo, QH
  • Panetta, JH
  • Angelini, C
  • Batignani, G
  • Bettarini, S
  • Bondioli, M
  • Carpinelli, M
  • Forti, F
  • Giorgi, MA
  • Lusiani, A
  • Martinez-Vidal, F
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  • Simi, G
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  • Lu, C
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  • Smith, AJ
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  • Varnes, EW
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  • Emery, S
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  • Giraud, PF
  • Hamel De Monchenault, G
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  • Langer, M
  • London, GW
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  • Copty, N
  • Purohit, MV
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  • Berger, JP
  • Bloom, E
  • Boyarski, AM
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  • Wisniewski, WJ
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  • Weidemann, AW
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  • Kitayama, I
  • Lou, XC
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  • DiGirolamo, B
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  • Bosisio, L
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  • Lanceri, L
  • Pompili, A
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  • Vuagnin, G
  • Panvini, RS
  • Brown, CM
  • De Silva, A
  • Kowalewski, R
  • Roney, JM
  • Band, HR
  • Charles, E
  • Dasu, S
  • Di Lodovico, F
  • Eichenbaum, AM
  • Hu, H
  • Johnson, JR
  • Liu, R
  • Nielsen, J
  • Pan, Y
  • Prepost, R
  • Scott, IJ
  • Sekula, SJ
  • von Wimmersperg-Toeller, JH
  • Wu, SL
  • Zobernig, H
  • Kordich, TM
  • Neal, H
  • BABAR Collaboration
  • et al.
Abstract

We present an updated measurement of time-dependent CP-violating asymmetries in neutral B decays with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. This result uses an additional sample of Upsilon(4S) decays collected in 2001, bringing the data available to 32 x 10(6) BB macro pairs. We select events in which one neutral B meson is fully reconstructed in a final state containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the standard model is proportional to sin2 beta, is derived from the decay time distributions in such events. The result sin2 beta = 0.59+/-0.14(stat)+/-0.05(syst) establishes CP violation in the B(0) meson system. We also determine absolute value of lambda = 0.93+/-0.09(stat)+/-0.03(syst), consistent with no direct CP violation.

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