Y. Unno, K. Suzuki
Published 2003-04-24Version 1
We report an improved measurement of the partial-rate CP asymmetry in B+ => K0pi+ and B- => K0bar pi- decays. The analysis is based on a data sample of 85 million BBbar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB e+ e- storage ring. We measure Acp(K0pi+-) = 0.07^{+0.09 +0.01}_{-0.08 -0.03}, where the first and second errors are statistical and systematic, respectively; the corresponding 90% confidence-level interval is -0.10 < Acp(K0pi+-) < 0.22 .
Comments: 7 pages, 8 figures, submitted to Phys. Rev. D
Journal: Phys.Rev.D68:011103,2003
Study of B+- --> D_CP K+- and D^*_CP K+- decays
Measurement of charmless $B$ Decays to $ηK^*$ and $ηρ$
Measurement of the Branching Fraction for B^0 --> a1(1260)+-pi-+ with 535 Million BBbar Pairs
