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Partial wave analysis of $ψ'\toγχ_{c0}\to γp K^- \barΛ$ used for searching for baryon resonance

The 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, $p K^- \barΛ$, the evident $Λ^*$ and $N^*$ bands have been observed. Similarly, by using the product of $χ_{cJ}$ from $ψ'$ radiative decay, we may confirm it 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 $ψ'\toγχ_{c0}$. Here, we provide explicit partial wave analysis formulae for the very interesting channel $ψ'\toγχ_{c0}\to γp K^- \barΛ$.