Partial wave analysis of ψ′→γχ_c0→γpK^－Λ used for searching for baryon resonance

Abstract: Abundant ψ′ events have been collected at the Beijing Electron Positron Collider-Ⅱ (BEPCⅡ) that could undoubtedly provide us with a great opportunity to study the more attractive charmonium decays. As has been noticed before, in the process of J/ψ decaying to the baryonic final states, pK^－Λ, the evident Λ^* and N^* bands have been observed. Similarly, by using the product of χ_cJ from ψ′ radiative decay, we may confirm this or find some extra new resonances. χ_c0's data samples will be more than χ_c1,2, taking into account the larger branching ratio of ψ′→γχ_c0. Here, we provide explicit partial wave analysis formulae for the very interesting channel ψ′→γχ_c0→γpK^－Λ.