Charmless Hadronic B-Meson Decays

TL;DR

This paper reviews experimental measurements and theoretical models of charmless B-meson decays, highlighting agreements and puzzles in branching fractions and CP asymmetries based on data mainly from BABAR and Belle.

Contribution

It provides a comprehensive overview of experimental results and compares them with QCD-based theoretical predictions, identifying unresolved issues in the field.

Findings

Experimental results largely agree with QCD-based theories.

Some discrepancies remain in CP-violating asymmetries.

Challenges persist in fully understanding charmless B-meson decays.

Abstract

We give an overview of the experimental measurements and the theoretical understanding of the branching fractions and CP-violating asymmetries of charmless B-meson decays. Most experimetal results are from the BABAR and Belle experiments during the past decade. The global features of these experimental results are typically well described by the QCD-motivated theories such as QCD factorization, pQCD and soft-collinear effective theory. The agreement between theory and experiment is generally satisfactory, though there remain some unsolved puzzles that pose a great challenge to both theorists and experimentalists.