Charmless Hadronic Two-Body B Meson Decays

TL;DR

This paper presents a comprehensive analysis of charmless two-body B meson decays into K pi, pi pi, and K K final states using Belle experiment data, reporting observations, limits, and asymmetry searches.

Contribution

It provides the first complete measurement of branching fractions and asymmetries for all relevant charmless two-body B decay modes at Belle.

Findings

Significant signals in K pi, pi+ pi-, and pi+ pi0 final states

Limits set on pi0 pi0 and K K decay modes

Search for partial-rate asymmetries conducted

Abstract

We report the results of a study of two-body B meson decays to the complete set of K pi, pi pi, and K K final states. The study is performed on a data sample of 31.7 +/- 0.3 million B B-bar events recorded on the Upsilon(4S) resonance by the Belle experiment at KEKB. We observe significant signals in all K pi final states and in the pi+ pi- and pi+ pi0 final states. We set limits on the pi0 pi0 and K K final states. A search is performed for partial-rate asymmetries between conjugate states for flavor-specific final states.