Pion-photon and kaon-photon transition distribution amplitudes in the Nambu–Jona-Lasinio model

作     者：Jin-Li Zhang Jun Wu 张金利;吴军

作者机构：Department of Mathematics and PhysicsNanjing Institute of TechnologyNanjing 211167China National Laboratory of Solid State MicrostructuresDepartment of PhysicsNanjing UniversityNanjing 210093China 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2024年第48卷第8期

页      面：94-103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 Scientific Research Foundation of Nanjing Institute of Technology(YKJ202352) the Natural Science Foundation of Jiangsu Province,China(BK20191472) the China Postdoctoral Science Foundation(2022M721564) 

主　　题：transition form factors NJL model transition distribution amplitudes 

摘      要：The Nambu–Jona-Lasinio model is utilized to investigate the pion-and kaon-photon leading-twist transition distribution amplitudes using proper time ***,the properties of the vector and axial vector pion-photon transition distribution amplitudes are examined,and the results meet the desired *** study involves sum rule and polynomiality *** vector and axial vector pion-photon transition form factors that are present in theπ^(+)→γe^(+)νprocess are the first Mellin moments of the pion-photon transition distribution *** vector transition form factor originates from the internal structure of hadrons,the axial current can be coupled to a pion,this pion is virtual,and its contribution will be present independently of the external *** kaon transition form factors are *** vector form factor s value at zero momentum transfer is determined by the axial anomaly,while this is not the case for the axial *** vector and axial form factors,as well as the neutral pion vector form factor F_(πγγ)(t),are *** to our findings,the pion axial transition form factor is harder than the vector transition form factor and harder than the electromagnetic form *** also discuss the link betweenπ−γandγ−πtransitions distribution amplitudes.