Effects from hadronic structure of photon on B→φγ and B_(s)→(ρ^(0),ω)γ decays  

作　　者：李运 邹芝田 沈月龙 李营 Yun Li;Zhi-Tian Zou;Yue-Long Shen;Ying Li(Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry&Technology,Shaanxi University of Science&Technology,Xi'an 710021,China;Department of Physics,Yantai University,Yantai 264005,China;College of Physics and Photoelectric Engineering,Ocean University of China,Qingdao 266100,China)

机构地区：[1]Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry&Technology,Shaanxi University of Science&Technology,Xi'an 710021,China [2]Department of Physics,Yantai University,Yantai 264005,China [3]College of Physics and Photoelectric Engineering,Ocean University of China,Qingdao 266100,China

出　　处：《Chinese Physics C》2023年第2期46-54,共9页中国物理C（英文版）

基　　金：Supported in part by the Open Project of Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry & Technology (XTKF-2020-01);the Nation-al Science Foundation of China (11705159,11975195);the Natural Science Foundation of Shandong province (ZR2019JQ04,ZR2022ZD26,ZR2020MA093);the Project of Shandong Province Higher Educational Science and Technology Program (2019KJJ007)。

摘　　要：Using the perturbative QCD approach,we studied the effects of the hadronic structure of photons on the pure annihilation rediative decays B→φγ and B_(s)→(ρ^(0),ω)γ.These decays have small branching fractions due to the power suppression by Λ/mB,which makes them very sensitive to next-leading power corrections.The quark components and the related two-particle distribution amplitudes of a final state photon are introduced.The branching fractions can be enhanced remarkably by factorizable and nonfactorizable emission diagrams.The branching fraction of B→φγ increases by approximately 40 times,and those of B_(s)→ρ^(0)γ and B_(s)→ωγ are on the order of O(10-10).We also note that the ratio of branching fractions of B_(s)→ρ^(0)γ and B_(s)→ωγ is very sensitive to the effects of the hadronic structure of photons.All these results can be tested in future.

关 键 词：B decays power correction pure annihilation decays 

分 类 号：O572.33[理学—粒子物理与原子核物理]