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10–14 Nov 2021
暨南大学
Asia/Shanghai timezone

Global determination of two-meson distribution amplitudes from three-body B decays

Not scheduled
15m
暨南大学

暨南大学

Speaker

Mr Yan DaCheng (Changzhou University)

Description

We perform a global analysis of three-body charmless hadronic decays B → V P3 → P1P2P3 in the perturbative QCD (PQCD) approach, where V denotes an intermediate vector resonance, and Pi, i = 1, 2, 3, denote final-state pseudoscalar mesons. Fitting the PQCD factorization formulas at leading order in the strong coupling αs to measured branching ratios and direct CP asymmetries, we determine the Gegenbauer moments in two-meson distribution amplitudes (DAs) for the meson pairs P1P2 = ππ, Kπ, KK. The fitted Gegenbauer moments are then employed to make predictions for those observables, whose data are excluded in the fit due to larger experimental uncertainties. A general consistency between our predictions and data is achieved, which hints the validity of the PQCD formalism for the above three-body B meson decays and the universality of the nonperturbative two-meson DAs. The obtained two-meson DAs can be applied to PQCD studies of other multibody B meson decays involving the same meson pairs. We also attempt to determine the dependence of the Gegenbauer moments on the meson-pair invariant mass, and demonstrate that this determination is promising, when data become more precise.
Presentation type Oral

Primary author

Mr Yan DaCheng (Changzhou University)

Presentation materials

There are no materials yet.