- Main
Measurements of branching fractions and CP-violating asymmetries in B0 → π+π-, K+π-, K+K- decays
- Aubert, B;
- Boutigny, D;
- Gaillard, JM;
- Hicheur, A;
- Karyotakis, Y;
- Lees, JP;
- Robbe, P;
- Tisserand, V;
- Zghiche, A;
- Palano, A;
- Pompili, A;
- Chen, JC;
- Qi, ND;
- Rong, G;
- Wang, P;
- Zhu, YS;
- Eigen, G;
- Ofte, I;
- Stugu, B;
- Abrams, GS;
- Borgland, AW;
- Breon, AB;
- Brown, DN;
- Button-Shafer, J;
- Cahn, RN;
- Charles, E;
- Gill, MS;
- Gritsan, AV;
- Groysman, Y;
- Jacobsen, RG;
- Kadel, RW;
- Kadyk, J;
- Kerth, LT;
- Kolomensky, YG;
- Kral, JF;
- LeClerc, C;
- Levi, ME;
- Lynch, G;
- Mir, LM;
- Oddone, PJ;
- Orimoto, TJ;
- 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;
- Lewandowski, B;
- Peters, K;
- Schmuecker, H;
- Steinke, M;
- Barlow, NR;
- Bhimji, W;
- Boyd, JT;
- Chevalier, N;
- Clark, PJ;
- Cottingham, WN;
- Mackay, C;
- Wilson, FF;
- Abe, K;
- Hearty, C;
- Mattison, TS;
- McKenna, JA;
- Thiessen, D;
- Jolly, S;
- McKemey, AK;
- Blinov, VE;
- Bukin, AD;
- Buzykaev, AR;
- Golubev, VB;
- Ivanchenko, VN;
- Korol, AA;
- Kravchenko, EA;
- Onuchin, AP;
- Serednyakov, SI;
- Skovpen, YI;
- Yushkov, AN;
- Best, D;
- Chao, M;
- Kirkby, D;
- Lankford, AJ;
- Mandelkern, M;
- McMahon, S;
- Stoker, DP;
- Buchanan, C;
- Chun, S;
- Hadavand, HK;
- Hill, EJ;
- MacFarlane, DB
- et al.
Abstract
We present measurements of branching fractions and CP-violating asymmetries for neutral B meson decays to two-body final states of charged pions and kaons based on a sample of about 88 million Y(4S)-->BB decays. From a time-independent fit we measure the charge-averaged branching fractions B(B0-->pi+pi-) = (4.7 +/- 0.6 +/- 0.2) x 10^-6, B(B0-->K+pi-) = (17.9 +/- 0.9 +/- 0.7) x 10^-6, and the direct CP-violating charge asymmetry A(Kpi) = -0.102 +/- 0.050 +/- 0.016; [-0.188,-0.016], where the ranges in square brackets indicate the 90% confidence intervals. From a time-dependent fit we measure the B0-->pi+pi- CP-violating parameters Spipi = 0.02 +/- 0.34 +/- 0.05; [-0.54,+0.58] and Cpipi = -0.30 +/- 0.25 +/- 0.04; [-0.72,+0.12].
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