Extraction of the CKM phase $\gamma$ from charmless two-body B meson decays

Abstract

Utilizing all the experimental measured charmless $B\to PP$, $PV$ decay modes, where $P(V)$ denotes a light pseudoscalar (vector) meson, we extract the CKM angle $\gamma$ by global fit. All the unknown hadronic parameters are fitted with $\gamma$ together from experimental data, so as to make the approach least model dependent. The different contributions for various decay modes are classified by topological weak Feynman diagram amplitudes, which are to be determined by the global fit. To improve the precision of this approach, we consider flavor SU(3) breaking effects of topological diagram amplitudes among different decay modes by including the form factors and decay constants. The fitted result for CKM angle $\gamma$ is $(69.8\pm 2.1\pm 0.9{)}^{°}$. It is consistent with the current world average with a better precision.

arXiv comment15 pages, including 2 figures

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Cited by in corpus (3)

• Global Analysis of hadronic two-body B decays in the perturbative QCD approach
• Analysis of three-body charmed B meson decays under the factorization-assisted topological-amplitude approach
• Analysis of three-body charmless $B$-meson decays under the factorization-assisted topological-amplitude approach