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Measurement of the branching fraction and CP content for the decay B0-->D(*+)D(*-).

  • Author(s): Aubert, B;
  • Boutigny, D;
  • Gaillard, J-M;
  • Hicheur, A;
  • Karyotakis, Y;
  • Lees, JP;
  • Robbe, P;
  • Tisserand, V;
  • Zghiche, A;
  • Palano, A;
  • Pompili, A;
  • Chen, GP;
  • Chen, JC;
  • Qi, ND;
  • Rong, G;
  • Wang, P;
  • Zhu, YS;
  • Eigen, G;
  • Stugu, B;
  • Abrams, GS;
  • Borgland, AW;
  • Breon, AB;
  • Brown, DN;
  • Button-Shafer, J;
  • Cahn, RN;
  • Gill, MS;
  • Gritsan, AV;
  • Groysman, Y;
  • Jacobsen, RG;
  • Kadel, RW;
  • Kadyk, J;
  • Kerth, LT;
  • Kolomensky, Yu G;
  • Kral, JF;
  • LeClerc, C;
  • Levi, ME;
  • Lynch, G;
  • Oddone, PJ;
  • Pripstein, M;
  • Roe, NA;
  • Romosan, A;
  • Ronan, MT;
  • Shelkov, VG;
  • Telnov, AV;
  • Wenzel, WA;
  • Harrison, TJ;
  • Hawkes, CM;
  • Knowles, DJ;
  • O'Neale, SW;
  • Penny, RC;
  • Watson, AT;
  • Watson, NK;
  • Deppermann, T;
  • Goetzen, K;
  • Koch, H;
  • Kunze, M;
  • Lewandowski, B;
  • Peters, K;
  • Schmuecker, H;
  • Steinke, M;
  • Barlow, NR;
  • Bhimji, W;
  • Chevalier, N;
  • Clark, PJ;
  • Cottingham, WN;
  • Foster, B;
  • Mackay, C;
  • Wilson, FF;
  • Abe, K;
  • Hearty, C;
  • Mattison, TS;
  • McKenna, JA;
  • Thiessen, D;
  • Jolly, S;
  • McKemey, AK;
  • Blinov, VE;
  • Bukin, AD;
  • Bukin, DA;
  • Buzykaev, AR;
  • Golubev, VB;
  • Ivanchenko, VN;
  • Korol, AA;
  • Kravchenko, EA;
  • Onuchin, AP;
  • Serednyakov, SI;
  • Skovpen, Yu I;
  • Telnov, VI;
  • Yushkov, AN;
  • Best, D;
  • Chao, M;
  • Kirkby, D;
  • Lankford, AJ;
  • Mandelkern, M;
  • McMahon, S;
  • Stoker, DP;
  • Arisaka, K;
  • Buchanan, C;
  • Chun, S;
  • MacFarlane, DB;
  • Prell, S;
  • Rahatlou, Sh;
  • Raven, G;
  • Sharma, V;
  • Campagnari, C;
  • Dahmes, B;
  • Hart, PA;
  • Kuznetsova, N;
  • Levy, SL;
  • Long, O;
  • Lu, A;
  • Mazur, MA;
  • Richman, JD;
  • Verkerke, W;
  • Beringer, J;
  • Eisner, AM;
  • Grothe, M;
  • Heusch, CA;
  • Lockman, WS;
  • Pulliam, T;
  • 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;
  • Yang, S;
  • Zhu, RY;
  • Devmal, S;
  • Jayatilleke, S;
  • Mancinelli, G;
  • Meadows, BT;
  • Sokoloff, MD;
  • Barillari, T;
  • Bloom, P;
  • Ford, WT;
  • Nauenberg, U;
  • Olivas, A;
  • Rankin, P;
  • Roy, J;
  • Smith, JG;
  • Van Hoek, WC;
  • Zhang, L;
  • Blouw, J;
  • Harton, JL;
  • Krishnamurthy, M;
  • Soffer, A;
  • Toki, WH;
  • Wilson, RJ;
  • Zhang, J;
  • Brandt, T;
  • Brose, J;
  • Colberg, T;
  • Dickopp, M;
  • Dubitzky, RS;
  • Hauke, A;
  • Maly, E;
  • Müller-Pfefferkorn, R;
  • Otto, S;
  • Schubert, KR;
  • Schwierz, R;
  • Spaan, B;
  • Wilden, L;
  • Bernard, D;
  • Bonneaud, GR;
  • Brochard, F;
  • Cohen-Tanugi, J;
  • Ferrag, S;
  • T'Jampens, S;
  • Thiebaux, Ch;
  • Vasileiadis, G;
  • Verderi, M;
  • Anjomshoaa, A;
  • Bernet, R;
  • Khan, A;
  • Lavin, D;
  • Muheim, F;
  • Playfer, S;
  • Swain, JE;
  • Tinslay, J;
  • Falbo, M;
  • Borean, C;
  • Bozzi, C;
  • 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;
  • Lo Vetere, M;
  • Macri, M;
  • Monge, MR;
  • Passaggio, S;
  • Pastore, FC;
  • Patrignani, C;
  • Robutti, E;
  • Santroni, A;
  • Tosi, S;
  • Morii, M;
  • Bartoldus, R;
  • Hamilton, R;
  • Mallik, U;
  • Cochran, J;
  • Crawley, HB;
  • Fischer, P-A;
  • Lamsa, J;
  • Meyer, WT;
  • Rosenberg, EI;
  • Yi, J;
  • Grosdidier, G;
  • Höcker, A;
  • Lacker, HM;
  • Laplace, S;
  • Le Diberder, F;
  • Lepeltier, V;
  • Lutz, AM;
  • Plaszczynski, S;
  • Schune, MH;
  • Trincaz-Duvoid, S;
  • Wormser, G;
  • Bionta, RM;
  • Brigljević, V;
  • Lange, DJ;
  • Mugge, M;
  • Van Bibber, K;
  • Wright, DM;
  • Bevan, AJ;
  • 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;
  • Morton, GW;
  • Nash, JA;
  • Sanders, P;
  • Smith, D;
  • Back, JJ;
  • Bellodi, G;
  • Dixon, P;
  • Harrison, PF;
  • Potter, RJL;
  • Shorthouse, HW;
  • Strother, P;
  • Vidal, PB;
  • Cowan, G;
  • George, S;
  • Green, MG;
  • Kurup, A;
  • Marker, CE;
  • McMahon, TR;
  • Ricciardi, S;
  • Salvatore, F;
  • Vaitsas, G;
  • Brown, D;
  • Davis, CL;
  • Allison, J;
  • Barlow, RJ;
  • Boyd, JT;
  • Forti, AC;
  • Jackson, F;
  • Lafferty, GD;
  • Savvas, N;
  • Weatherall, JH;
  • Williams, JC;
  • Farbin, A;
  • Jawahery, A;
  • Lillard, V;
  • Olsen, J;
  • Roberts, DA;
  • Schieck, JR;
  • Blaylock, G;
  • Dallapiccola, C;
  • Flood, KT;
  • Hertzbach, SS;
  • Kofler, R;
  • Koptchev, VB;
  • Moore, TB;
  • Staengle, H;
  • Willocq, S;
  • Brau, B;
  • Cowan, R;
  • Sciolla, G;
  • Taylor, F;
  • Yamamoto, RK;
  • Milek, M;
  • Patel, PM;
  • Palombo, F;
  • Bauer, JM;
  • Cremaldi, L;
  • Eschenburg, V;
  • Kroeger, R;
  • Reidy, J;
  • Sanders, DA;
  • Summers, DJ;
  • Hast, C;
  • Nief, JY;
  • Taras, P;
  • Nicholson, H;
  • Cartaro, C;
  • Cavallo, N;
  • De Nardo, G;
  • Fabozzi, F;
  • Gatto, C;
  • Lista, L;
  • Paolucci, P;
  • Piccolo, D;
  • Sciacca, C;
  • LoSecco, JM;
  • Alsmiller, JRG;
  • Gabriel, TA;
  • Brau, J;
  • Frey, R;
  • Grauges, E;
  • Iwasaki, M;
  • Sinev, NB;
  • Strom, D;
  • Colecchia, F;
  • Dal Corso, F;
  • Dorigo, A;
  • Galeazzi, F;
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  • 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 Vaissière, Ch;
  • Del Buono, L;
  • Hamon, O;
  • Leruste, Ph;
  • Ocariz, J;
  • Pivk, M;
  • Roos, L;
  • Stark, J;
  • Manfredi, PF;
  • Re, V;
  • Speziali, V;
  • Frank, ED;
  • Gladney, L;
  • Guo, QH;
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  • Angelini, C;
  • Batignani, G;
  • Bettarini, S;
  • Bondioli, M;
  • Bucci, F;
  • Campagna, E;
  • Carpinelli, M;
  • Forti, F;
  • Giorgi, MA;
  • Lusiani, A;
  • Marchiori, G;
  • Martinez-Vidal, F;
  • Morganti, M;
  • Neri, N;
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  • Sandrelli, F;
  • Simi, G;
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  • BABAR
  • et al.
Abstract

We report a measurement of the branching fraction of the decay B0-->D(*+)D(*-) and of the CP-odd component of its final state using the BABAR detector. With data corresponding to an integrated luminosity of 20.4 fb (-1) collected at the Upsilon(4S) resonance during 1999-2000, we have reconstructed 38 candidate signal events in the mode B0-->D(*+)D(*-) with an estimated background of 6.2+/-0.5 events. From these events, we determine the branching fraction to be B(B0-->D(*+)D(*-))=[8.3+/-1.6(stat)+/-1.2(syst)]x10(-4). The measured CP-odd fraction of the final state is 0.22+/-0.18(stat)+/-0.03(syst).

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