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.

15 pages, including 2 figures

References in corpus (16)

• Current status of the Standard Model CKM fit and constraints on $\Delta F=2$ New Physics
• B->V gamma Beyond QCD Factorisation
• Form Factors from Light-Cone Sum Rules with B-Meson Distribution Amplitudes
• Branching ratios and direct CP asymmetries in $D\to PP$ decays
• Light-cone sum rules for $B\to \pi$ form factors revisited
• $B\to \pi \ell {\nu }_l$ Width and $|V_{ub}|$ from QCD Light-Cone Sum Rules
• $B_{(s)},D_{(s)}\to \pi ,K,\eta ,\rho ,K^{\ast },\omega ,\varphi$ Transition Form Factors and Decay Rates with Extraction of the CKM parameters $|V_{ub}|$, $|V_{cs}|$, $|V_{cd}|$
• Heavy-to-light form factors on the light cone
• Updating B --> PP, VP decays in the framework of flavor symmetry
• Analysis of Charmless Two-body B decays in Factorization Assisted Topological Amplitude Approach
• Radiative Corrections on the $B\to P$ Form Factors with Chiral Current in the Light-Cone Sum Rules
• Revisiting the form factors of $P\to V$ transition within the light-front quark models
• Observation of the annihilation decay mode $B^0\to K^{+}{K}^{-}$
• Using U Spin to Extract gamma from Charmless B -> PPP Decays
• Extraction of the CKM phase $\gamma$ using charmless 3-body decays of $B$ mesons
• Power corrections to the pion transition form factor from higher-twist distribution amplitudes of photon

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