Fits of weak annihilation and hard spectator scattering corrections in Bu,d ⃗ VV decays

• Published in: Journal of physics. G, Nuclear and particle physics Vol. 43; no. 10
• Main Authors: Chang, Qin, Li, Xiao-Nan, Sun, Jun-Feng, Yang, Yue-Ling
• Format: Journal Article
• Language: English
• Published: IOP Publishing 23.08.2016
• Subjects: B meson; QCD factorization; weak annihilation
• ISSN: 0954-3899; 1361-6471
• DOI: 10.1088/0954-3899/43/10/105004

In this paper, the contributions of weak annihilation and hard spectator scattering in B → K * , K * K ¯ * , φ K * , and φ φ decays are investigated within the framework of quantum chromodynamics factorization. Using the experimental data available, we perform χ 2 analyses of end-point parameters in four cases based on the topology-dependent and polarization-dependent parameterization schemes. The fitted results indicate that: (i) in the topology-dependent scheme, the relation ( A i , φ A i ) ( A f , φ A f ) obtained through B → PP and PV decays is favored by the penguin-dominated B → VV decays at 95% CL; (ii) the large hard spectator scattering corrections and/or the simplification ( H , φ H ) = ( A i , φ A i ) are challenged by  ( B ¯ 0 → 0 0 ) , even though they are allowed by B → PP and PV decays and helpful for resolving the ' π π puzzle'; (iii) in the polarization-dependent scheme, the relation ( A L , φ A L ) ( A T , φ A T ) is always required. Moreover, we have updated the theoretical results for B → VV decays with the best-fit values of end-point parameters. A few observables, such as the ones of pure annihilation B d → φ φ decay, are also identified for probing the annihilation corrections.