Tensor form factors of P→P,S,V and A transitions within standard and covariant light-front approaches  

作　　者：Qin Chang Xiao-Lin Wang Li-Ting Wang 常钦;王晓琳;王丽婷(Institute of Particle and Nuclear Physics,Henan Normal University,Henan 453007,China;Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics(MOE)Central China Normal University,Wuhan 430079,China)

机构地区：[1]Institute of Particle and Nuclear Physics,Henan Normal University,Henan 453007,China [2]Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics(MOE)Central China Normal University,Wuhan 430079,China

出　　处：《Chinese Physics C》2020年第8期46-66,共21页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(11875122);the Program for Innovative Research Team in University of Henan Province(19IRTSTHN018)。

摘　　要：We investigate the tensor form factors of,and A transitions within the standard light-front(SLF)and the covariant light-front(CLF)quark models(QMs).The self-consistency and Lorentz covariance of CLF QM are analyzed via these quantities,and the effects of zero-mode are discussed.For the and A transitions,besides the inconsistency between the results extracted via longitudinal and transverse polarization states,which is caused by the residual-dependent spurious contributions,we find and analyze a“novel”self-consistence problem of the traditional CLF QM,caused by different strategies for dealing with the trace term in CLF matrix element.A possible solution to the problems of traditional CLF QM is discussed and confirmed numerically.Finally,the theoret-ical predictions for the tensor form factors of some and()induced and A transitions are updated within the CLF QM with a self-consistent scheme.

关 键 词：weak decay light-front quark model form factor 

分 类 号：O572.33[理学—粒子物理与原子核物理]