Journal article
Improved measurement of the partial-rate CP asymmetry in B →K0π and B -→K̄0π- decays
Y Unno, K Suzuki, K Abe, K Abe, T Abe, I Adachi, H Aihara, M Akatsu, Y Asano, T Aso, V Aulchenko, T Aushev, S Bahinipati, AM Bakich, Y Ban, S Banerjee, A Bay, I Bedny, PK Behera, I Bizjak Show all
Physical Review D | AMERICAN PHYSICAL SOC | Published : 2003
Abstract
We report an improved measurement of the partial-rate CP asymmetry in B±→K0π± decays. The analysis is based on a data sample of 85×106 BB̄ pairs collected at the Y(4S) resonance with the Belle detector at the KEKB e +e- storage ring. We measure ACP(K 0π±) = 0.07-0.08+0.09 +0.03+0.01, where the first and second errors are statistical and systematic, respectively; the corresponding 90% confidence-level interval is -0.10