Λc⁺(2940) photoproduction off the neutron

Original · EN

By assuming that the Λc(2940) is a pD 0 molecular state with spin-parity Jᵖ=1/2⁺ and Jᵖ=1/2⁻, the photoproduction of charmed Λc(2940) baryon in the γn→ D⁻Λc(2940)⁺ process is investigated with an effective Lagrangian approach. It is found that the contributions from t-channel with D exchange are dominant, while the s-channel with nucleon pole exchange give a sizeable contribution around the threshold. The contributions from the u-channel and contact term are very small. The total cross section of the γn→ D⁻Λc(2940)⁺ reaction is estimated, which indicate it is feasible to searching for the charmed Λc(2940) baryon at the COMPASS experiment.