We report an improved measurement of the partial-rate CP asymmetry in B±→K(-)0π± decays. The analysis is based on a data sample of 85×106 BB̄ pairs collected at the Γ(4S) resonance with the Belle detector at the KEKB e+e- storage ring. We measure A CP((K(-)0π± = 0.07 -0.08 -0.03+0.09 +0.01, where the first and second errors are statistical and systematic, respectively; the corresponding 90% confidence-level interval is -0.10 <ACP(K(-) 0π±)<0.22.
|Number of pages||6|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|Publication status||Published - 2003 Jul 1|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)