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Measurement of the branching fraction ratios and CP asymmetries in B-→ D0CPK-decays

  • Author(s): Aubert, B;
  • Bona, M;
  • Boutigny, D;
  • Karyotakis, Y;
  • Lees, JP;
  • Poireau, V;
  • Prudent, X;
  • Tisserand, V;
  • Zghiche, A;
  • Garra Tico, J;
  • Grauges, E;
  • Lopez, L;
  • Palano, A;
  • Pappagallo, M;
  • Eigen, G;
  • Stugu, B;
  • Sun, L;
  • Abrams, GS;
  • Battaglia, M;
  • Brown, DN;
  • Button-Shafer, J;
  • Cahn, RN;
  • Groysman, Y;
  • Jacobsen, RG;
  • Kadyk, JA;
  • Kerth, LT;
  • Kolomensky, YG;
  • Kukartsev, G;
  • Lopes Pegna, D;
  • Lynch, G;
  • Mir, LM;
  • Orimoto, TJ;
  • Osipenkov, IL;
  • Ronan, MT;
  • Tackmann, K;
  • Tanabe, T;
  • Wenzel, WA;
  • Del Amo Sanchez, P;
  • Hawkes, CM;
  • Watson, AT;
  • Koch, H;
  • Schroeder, T;
  • Walker, D;
  • Asgeirsson, DJ;
  • Cuhadar-Donszelmann, T;
  • Fulsom, BG;
  • Hearty, C;
  • Mattison, TS;
  • McKenna, JA;
  • Khan, A;
  • Saleem, M;
  • Teodorescu, L;
  • Blinov, VE;
  • Bukin, AD;
  • Druzhinin, VP;
  • Golubev, VB;
  • Onuchin, AP;
  • Serednyakov, SI;
  • Skovpen, YI;
  • Solodov, EP;
  • Todyshev, KY;
  • Bondioli, M;
  • Curry, S;
  • Eschrich, I;
  • Kirkby, D;
  • Lankford, AJ;
  • Lund, P;
  • Mandelkern, M;
  • Martin, EC;
  • Stoker, DP;
  • Abachi, S;
  • Buchanan, C;
  • Foulkes, SD;
  • Gary, JW;
  • Liu, F;
  • Long, O;
  • Shen, BC;
  • Vitug, GM;
  • Zhang, L;
  • Paar, HP;
  • Rahatlou, S;
  • Sharma, V;
  • Berryhill, JW;
  • Campagnari, C;
  • Cunha, A;
  • Dahmes, B;
  • Hong, TM;
  • Kovalskyi, D;
  • Richman, JD;
  • Beck, TW;
  • Eisner, AM;
  • Flacco, CJ;
  • Heusch, CA;
  • Kroseberg, J;
  • Lockman, WS;
  • Schalk, T;
  • Schumm, BA;
  • Seiden, A;
  • Wilso, MG;
  • Winstrom, LO
  • et al.
Creative Commons 'BY' version 4.0 license
Abstract

We present a preliminary study of B- → D 0 (CP)π- and B- → D 0 (CP)K- decays, with the D 0 (CP)reconstructed in the CP-odd eigenstates Ksπ0, Ks, in the CP-even eigenstates K+K-, π+π-, and in the (non-CP) flavor eigenstate K ± π ± . Using a sample of about 382 million γ(4S) decays into BB pairs, collected with the BABAR detector operating at the PEP-II asymmetric-energy B Factory at SLAC, we measure the ratios of the branching fractions B(B- → D 0 CP±K-) + B(B+ → D 0 CP±K+) [B(B- → D 0 K-) + B(B+ → D 0 K+)]/2 and the direct CP asymmetry ACP± Ξ B(B-→D 0 CP±K-) - B(B+→D 0 CP±K+) B(B-→D 0 CP±K-) + B(B+→D 0 CP±K+) . The results are: RCP- = 0.81 ± 0.10(stat) ± 0.05(syst) RCP+ = 1.07 ± 0.10(stat) ± 0.04(syst) ACP- = -0.19 ± 0.12(stat) ± 0.02(syst) ACP+ = 0.35 ± 0.09(stat) ± 0.05(syst).

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