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Evidence for B+ --> K0K+ and B0 --> K0K0, and measurement of the branching fraction and search for direct CP violation in B+ --> K0pi+.
- Author(s): Aubert, B;
- Barate, R;
- Boutigny, D;
- Couderc, F;
- Karyotakis, Y;
- Lees, JP;
- Poireau, V;
- Tisserand, V;
- Zghiche, A;
- Grauges, E;
- Palano, A;
- Pappagallo, M;
- Pompili, A;
- Chen, JC;
- Qi, ND;
- Rong, G;
- Wang, P;
- Zhu, YS;
- Eigen, G;
- Ofte, I;
- Stugu, B;
- Abrams, GS;
- Battaglia, M;
- Breon, AB;
- Brown, DN;
- Button-Shafer, J;
- Cahn, RN;
- Charles, E;
- Day, CT;
- Gill, MS;
- Gritsan, AV;
- Groysman, Y;
- Jacobsen, RG;
- Kadel, RW;
- Kadyk, J;
- Kerth, LT;
- Kolomensky, Yu G;
- Kukartsev, G;
- Lynch, G;
- Mir, LM;
- Oddone, PJ;
- Orimoto, TJ;
- Pripstein, M;
- Roe, NA;
- Ronan, MT;
- Wenzel, WA;
- Barrett, M;
- Ford, KE;
- Harrison, TJ;
- Hart, AJ;
- Hawkes, CM;
- Morgan, SE;
- Watson, AT;
- Fritsch, M;
- Goetzen, K;
- Held, T;
- Koch, H;
- Lewandowski, B;
- Pelizaeus, M;
- Peters, K;
- Schroeder, T;
- Steinke, M;
- Boyd, JT;
- Burke, JP;
- Chevalier, N;
- Cottingham, WN;
- Cuhadar-Donszelmann, T;
- Fulsom, BG;
- Hearty, C;
- Knecht, NS;
- Mattison, TS;
- McKenna, JA;
- Khan, A;
- Kyberd, P;
- Saleem, M;
- Teodorescu, L;
- Blinov, AE;
- Blinov, VE;
- Bukin, AD;
- Druzhinin, VP;
- Golubev, VB;
- Kravchenko, EA;
- Onuchin, AP;
- Serednyakov, SI;
- Skovpen, Yu I;
- Solodov, EP;
- Yushkov, AN;
- Best, D;
- Bondioli, M;
- Bruinsma, M;
- Chao, M;
- Curry, S;
- Eschrich, I;
- Kirkby, D;
- Lankford, AJ;
- Lund, P;
- Mandelkern, M;
- Mommsen, RK;
- Roethel, W;
- Stoker, DP;
- Buchanan, C;
- Hartfiel, BL;
- Weinstein, AJR;
- Foulkes, SD;
- Gary, JW;
- Long, O;
- Shen, BC;
- Wang, K;
- Zhang, L;
- del Re, D;
- Hadavand, HK;
- Hill, EJ;
- MacFarlane, DB;
- Paar, HP;
- Rahatlou, S;
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- Rodier, S;
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- Cheng, CH;
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- Touramanis, C;
- Cormack, CM;
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- Brown, CL;
- Cowan, G;
- Flaecher, HU;
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- Salvatore, F;
- Brown, D;
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- Lae, CK;
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- Hertzbach, SS;
- Kofler, R;
- Koptchev, VB;
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- Kim, H;
- Patel, PM;
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- Zhao, HW;
- Brunet, S;
- Côté, D;
- Taras, P;
- Viaud, B;
- Nicholson, H;
- Cavallo, N;
- De Nardo, G;
- Fabozzi, F;
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- Sciacca, C;
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- Wisniewski, WJ;
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- Wright, DH;
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- Yi, K;
- Young, CC;
- Burchat, PR;
- Edwards, AJ;
- Majewski, SA;
- Petersen, BA;
- Roat, C;
- Ahmed, M;
- Ahmed, S;
- Alam, MS;
- Ernst, JA;
- Saeed, MA;
- Wappler, FR;
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- Spanier, SM;
- Eckmann, R;
- Ritchie, JL;
- Satpathy, A;
- Schwitters, RF;
- Izen, JM;
- Kitayama, I;
- Lou, XC;
- Ye, S;
- Bianchi, F;
- Bona, M;
- Gallo, F;
- Gamba, D;
- Bomben, M;
- Bosisio, L;
- Cartaro, C;
- Cossutti, F;
- Della Ricca, G;
- Dittongo, S;
- Grancagnolo, S;
- Lanceri, L;
- Vitale, L;
- Martinez-Vidal, F;
- Panvini, RS;
- Banerjee, Sw;
- Bhuyan, B;
- Brown, CM;
- Fortin, D;
- Hamano, K;
- Kowalewski, R;
- Roney, JM;
- Sobie, RJ;
- Back, JJ;
- Harrison, PF;
- Latham, TE;
- Mohanty, GB;
- Band, HR;
- Chen, X;
- Cheng, B;
- Dasu, S;
- Datta, M;
- Eichenbaum, AM;
- Flood, KT;
- Graham, M;
- Hollar, JJ;
- Johnson, JR;
- Kutter, PE;
- Li, H;
- Liu, R;
- Mellado, B;
- Mihalyi, A;
- Pan, Y;
- Prepost, R;
- Tan, P;
- von Wimmersperg-Toeller, JH;
- Wu, SL;
- Yu, Z;
- Neal, H;
- BABAR Collaboration
- et al.
Abstract
We present evidence for the b --> d penguin-dominated decays B+ --> K0K+ and B0 --> K0K0 in 227 x 10(6) Y(4S) --> BB decays collected with the BABAR detector. We measure the branching fractions B(B+ --> K0K+) = (1.5 +/- 0.5 +/- 0.1) x 10(-6)(< 2.4 x 10(-6)) and B(B0 --> K0K0) = [formula: see text], where the uncertainties are statistical and systematic, respectively. We also present improved measurements of the charge-averaged branching fraction B(B+ --> K0pi+) = (26.0 +/- 1.3 +/- 1.0) x 10(-6) and CP-violating charge asymmetry A(CP) (K0pi+) = -0.09 +/- 0.05 +/- 0.01), where the uncertainties are statistical and systematic, respectively.
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