Photoproduction of hidden-charm states in the γp→D^(*0)Λ_c^+ reaction near threshold  

作　　者：Yin Huang Ju-Jun Xie Jun He Xurong Chen Hong-Fei Zhang 黄银;谢聚军;何军;陈旭荣;张鸿飞(Research Center for Hadron and CSR Physics, Lanzhou University and Institute of Modern Physics of CAS;School of Nuclear Science and Technology, Lanzhou University;Institute of Modern Physics, Chinese Academy of Sciences)

机构地区：[1]Research center for Hadron and CSR Physics, Lanzhou University and Institute of Modern Physics of CAS, Lanzhou 730000,China [2]School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China [3]Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

出　　处：《Chinese Physics C》2016年第12期99-105,共7页中国物理C（英文版）

基　　金：Supported by Major State Basic Research Development Program in China(2014CB845400);National Natural Science Foundation of China(11475227,11275235,11035006);Chinese Academy of Sciences(Knowledge Innovation Project(KJCX2-EW-N01);Youth Innovation Promotion Association CAS(2016367);Open Project Program of State Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,China(Y5KF151CJ1)

摘　　要：We report on a theoretical study of the hidden charm N＊cc states in the γp→ D＊0∧＋c reaction near threshold within an effective Lagrangian approach. In addition to the contributions from the s-channel nucleon pole, the t-channel Do exchange, the u-channel A＋ exchange and the contact term, we study the contributions from the N＊cc states with spin-parity JP=1/2- and 3/2-. The total and differential cross sections of the γp→ D＊0∧＋c reaction are predicted. It is found that the contributions of these N＊cc states give clear peak structures in the total cross sections. Thus, this reaction is another new platform to study the hidden-charm states. It is expected that our model calculation may be tested by future experiments.We report on a theoretical study of the hidden charm N＊cc states in the γp→ D＊0∧＋c reaction near threshold within an effective Lagrangian approach. In addition to the contributions from the s-channel nucleon pole, the t-channel Do exchange, the u-channel A＋ exchange and the contact term, we study the contributions from the N＊cc states with spin-parity JP=1/2- and 3/2-. The total and differential cross sections of the γp→ D＊0∧＋c reaction are predicted. It is found that the contributions of these N＊cc states give clear peak structures in the total cross sections. Thus, this reaction is another new platform to study the hidden-charm states. It is expected that our model calculation may be tested by future experiments.

关 键 词：hidden charm states photon production effective Lagrangian approach 

分 类 号：O572.33[理学—粒子物理与原子核物理]