Spectator scattering and annihilation contributions as a solution to theπKandππpuzzles within QCD factorization approach

Abstract

The large branching ratios for pure annihilationB 0 s → π + π − andB 0 d → K + K − decays reported by CDF and LHCb collaborations recently and the so-called πK and ππ puzzles indicate that spectator scattering and annihilation contributions are important to the penguin-dominated, color-suppressed tree dominated, and pure annihilation nonleptonic B decays. Combining the available experimental data for B u,d → ππ, πK and KK decays, we do a global fit on the spectator scattering and annihilation parameters

Study of the weak annihilation contributions in charmless $$\varvec{B_s\rightarrow VV}$$ B s → V V decays

“…Appendix C of Ref. [25] for detail). In the coming fits and posterior prediction, we have to evaluate the theoretical uncertainties induced by the inputs listed in Table 1.…”

“…column of Table 2 and will be used as constraints in the following χ 2 -fits. In order to probe the HSS and WA contributions in charmless B s → V V decays, we perform χ 2 -analyses for the endpoint parameters, adopting the statistical fitting approach illustrated in our previous work [25] (cf. Appendix C of Ref.…”

“…Such a topologydependent parameterization scheme is also favored by most of the charmless B → P P and PV (where V stands for a light vector meson) decays, as demonstrated in Refs. [26][27][28], and it could provide a possible solution to the well-known "π K CP-asymmetry puzzle" [25]. In addition, using the recent measurements of the pure annihilation B s → π + π − and B d → K + K − decays by the CDF [36], Belle [37] and LHCb collaborations [38,39], the authors of Refs.…”

“…Theoretically, the WA contributions with possible strong phase have attracted a lot of attention in the past few years, for instance, in Refs. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. Traditionally, both ρ A and φ A are treated as universal parameters for different kinds of annihilation topologies.…”

Light-front holographic distribution amplitudes of pseudoscalar mesons and their application to B -meson decays

“…From the phenomenological point of view, an annihilation amplitude with a large strong phase is generally welcome in order to fit experimental data and to explain some puzzles observed in B-meson decays [79][80][81][82][83][84]. As a result, a complex parameter X A has been introduced in the traditional parameterization scheme within the framework of QCDF [38].…”