Pc(4457) has been discovered over five years, but the parity of this particle remains undetermined. In this letter we propose a new interpretation for Pc(4457), which is the state generated from the coupled-channel D̄⁰Λc⁺(2595) and π⁰ Pc(4312) since they can exchange an almost on-shell Σc⁺. In this scenario, the parity of Pc(4457) will be positive, which is different from the candidate of the bound state of D̄^*Σc. The main decay channel of Pc(4457) in this model is Pc(4312)π. We propose three processes Λb⁰ → J/ψ Kₛ p π⁻, Λb⁰ → J/ψ K⁻ p π⁰, and Λb⁰ → J/ψ p π⁻ π⁺ K⁻ to verify Pc(4457)→ Pc(4312)π.
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Wu et al. (2024) studied this question.
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