2017/06/01 by Qin Chang, Xiao-Nan Li, Xiaonan Li +3
Computer Science · Physics and Astronomy · #Annihilation #B meson #Branching fraction #Computational Physics and Python Applications #Factorization #Particle physics theoretical and experimental studies #Polarization (electrochemistry) #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #hep-ex #hep-ph
paper · pdf · doi:10.1140/epjc/s10052-017-4980-9
31 pages, 4 figures, 6 tables
openalex publication_date 2017/06/01 · arxiv created 2017/06/19 · openalex created_date 2017/06/30 · arxiv updated 2017/08/02 · openalex updated_date 2026/08/06
In this paper, in order to probe the spectator-scattering and weak annihilation contributions in charmless Bs→ VV (where V stands for a light vector meson) decays, we perform the χ 2 -analyses for the endpoint parameters within the QCD factorization framework, under the constraints from the measured Bs→ ρ 0φ , φ K*0 , φ φ and K*0K*0 decays. The fitted results indicate that the endpoint parameters in the factorizable and nonfactorizable annihilation topologies are non-universal, which is also favored by the charmless B→ PP and PV (where P stands for a light pseudo-scalar meson) decays observed in previous work. Moreover, the abnormal polarization fractions fL,\bot (Bs→ K*0K*0)=(20.1± 7.0)%,(58.4± 8.5)% measured by the LHCb collaboration can be reconciled through the weak annihilation corrections. However, the branching ratio of Bs→ φ K*0 decay exhibits a tension between the data and theoretical result, which dominates the contributions to χ min2 in the fits. Using the fitted endpoint parameters, we update the theoretical results for the charmless Bs→ VV decays, which will be further tested by the LHCb and Belle-II experiments in the near future.