Study of decays of Ψ(3770) and Ψ(2S) into p anti p related channels

The physics goals of PANDA include a detailed investigation of the spectrum of charmonium. For this physics program, charmonium production cross sections in p anti p annihilation, which remain poorly measured, are obviously crucial, both to evaluate luminosity requirements and to design detector. With the data of BESIII, we plan to study the decay of Ψ(3770) to p anti p, which will be very useful to estimate the cross section of p anti p to Ψ(3770) in the PANDA experiment using detailed balance. The cross section of p anti p to Ψ(3770) could then be used to provide the lowest limit for the cross section of p anti p to open charm which is important for the open charm physics in PANDA. We also plan to study decays of Ψ(3770) and Ψ(2S) to p anti pπ0(η). According to theory studies, knowledge of the decay of charmonium into p anti p related channels can be used to estimate the numerical scale of the charmonium production cross section with certain theory models. The study of these channels will be helpful for the estimate of associated charmonium production in the PANDA experiment.