Measurements of CP-violating asymmetries in B0-->a1+/-(1260)pi-/+ decays

• Published in: Physical review letters 2007-05, Vol.98 (18), p.181803-181803
• Main Authors: Aubert, B, Bona, M, Boutigny, D, Karyotakis, Y, Lees, J P, Poireau, V, Prudent, X, Tisserand, V, Zghiche, A, Grauges, E, Palano, A, Chen, J C, Qi, N D, Rong, G, Wang, P, Zhu, Y S, Eigen, G, Ofte, I, Stugu, B, Abrams, G S, Battaglia, M, Brown, D N, Button-Shafer, J, Cahn, R N, Groysman, Y, Jacobsen, R G, Kadyk, J A, Kerth, L T, Kolomensky, Yu G, Kukartsev, G, Lopes Pegna, D, Lynch, G, Mir, L M, Orimoto, T J, Pripstein, M, Roe, N A, Ronan, M T, Tackmann, K, Wenzel, W A, Del Amo Sanchez, P, Barrett, M, Harrison, T J, Hart, A J, Hawkes, C M, Watson, A T, Held, T, Koch, H, Lewandowski, B, Pelizaeus, M, Peters, K, Schroeder, T, Steinke, M, Boyd, J T, Burke, J P, Cottingham, W N, Walker, D, Asgeirsson, D J, Cuhadar-Donszelmann, T, Fulsom, B G, Hearty, C, Knecht, N S, Mattison, T S, McKenna, J A, Khan, A, Kyberd, P, Saleem, M, Sherwood, D J, Teodorescu, L, Blinov, V E, Bukin, A D, Druzhinin, V P, Golubev, V B, Onuchin, A P, Serednyakov, S I, Skovpen, Yu I, Solodov, E P, Todyshev, K Yu, Bondioli, M, Bruinsma, M, Chao, M, Curry, S, Eschrich, I, Kirkby, D, Lankford, A J, Lund, P, Mandelkern, M, Martin, E C, Stoker, D P, Abachi, S, Buchanan, C, Foulkes, S D, Gary, J W, Liu, F, Long, O, Shen, B C, Zhang, L, Hill, E J, Paar, H P, Rahatlou, S, Sharma, V
• Format: Article
• Language: English
• ISSN: 0031-9007
• DOI: 10.1103/PhysRevLett.98.181803

We present measurements of CP-violating asymmetries in the decay B(0)-->a(1)(+/-)(1260)pi(-/+) with a(1)(+/-)(1260)-->pi(-/+)pi(+/-)pi(+/-). The data sample corresponds to 384x10(6) BB[over ] pairs collected with the BABAR detector at the PEP-II asymmetric B factory at SLAC. We measure the CP-violating asymmetry A(CP)(a(1)pi)=-0.07+/-0.07+/-0.02, the mixing-induced CP violation parameter S(a(1)pi)=0.37+/-0.21+/-0.07, the direct CP violation parameter C(a(1)pi)=-0.10+/-0.15+/-0.09, and the parameters DeltaC(a(1)pi)=0.26+/-0.15+/-0.07 and DeltaS(a(1)pi)=-0.14+/-0.21+/-0.06. From these measured quantities we determine the angle alpha(eff)=78.6 degrees +/-7.3 degrees.