ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2001, vol. 64, p. -
Search for direct CP violation in B→K π decays
We search for direct CP violation in flavor specific B→Kπ decays by measuring the rate asymmetry between charge conjugate modes.The search is performed on a data sample of 11.1× 106 BB̄ events recorded on the Υ(4S) resonance by the Belle experiment at KEKB. We measure 90% confidence intervals in the partial rate asymmetry ACP of -0.25< ACP(K± π±)<0.37,_ -0.40<ACP(K± π0)<0.36, and -0.53 <ACP(K± + π0)<0.82. By combining the K± π± and K± π0 final states, we conclude that -0.22 <ACP(K±(π±: + π0))<0.25 at the 90% confidence level. ©2001 The American Physical Society.