Photoproduction of hidden-charm states in the γp→ D＊0∧＋c reaction near threshold

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.