Journal article

Improved measurement of the partial-rate CP asymmetry in B -> K-0 pi( ) and B-->(K)over-bar(0)pi(-) 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 →K π decays. The analysis is based on a data sample of 85×10 BB̄ pairs collected at the Y(4S) resonance with the Belle detector at the KEKB e e storage ring. We measure A (K π ) = 0.07- , where the first and second errors are statistical and systematic, respectively; the corresponding 90% confidence-level interval is -0.10