Improved measurements of the branching fractions for B→Kπ, ππ, and K(K)over-bar decays -: art. no. 111102

We report improved measurements of branching fractions for B-->Kpi, pi(+)pi(-), pi(+)pi(0), and K(K) over bar decays based on a data sample of 85.0 million B(B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB e(+)e(-) storage ring. This data sample is almost three times larger than the sample previously used. We observe clear signals for B-->Kpi, pi(+)pi(-), and pi(+)pi(0) decays and set upper limits on B-->K(K) over bar decays. The results can be used to give model-dependent constraints on the CKM angle phi(3), as well as limits on the hadronic uncertainty in the time-dependent analysis of the angle phi(2).