Perturbative Quantum Chromodynamics Effects in Bc →PP Decays

作     者：GUO Li-Bo DU Dong-Sheng 郭立波;杜东生

作者机构：Department of PhysicsWuhan UniversityWuhan 430072 Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100039 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2001年第18卷第4期

页      面：498-500页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported by the National Natural Science Foundation of China under Grant No.19775012 

主　　题：decay apply Hamiltonian 

摘      要：Using the leading order low energy effective Hamiltonian, we calculate Bc →PP (where P stands for pseudoscalar meson) decays induced by pure W-emission mechanisms. In order to estimate the hadronic matrix elements, we apply the perturbative quantum chromodynamics (PQCD) method proposed by Szczepaniak et al. [Phys. Lett. B 243 (1990) 287] and developed by Simma et al. [Phys. Lett. B 272 (1991) 395]. Comparing with predictions of other models, we find that the PQCD method is suitable for these decays and therefore the spectator ansatz seems questionable.