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On the possible virtual state nature of the LHCb Pc$(4312)^+$ signal

In this contribution we study the nature of the new Pc$(4312)^+$ signal reported by LHCb collaboration in the $J/ψ\,p$ spectrum. We use $S$-matrix principles to perform a minimum-bias analysis of the data, focusing on the analytic properties that can be related to the microscopic origin of the Pc$(4312)^+$ peak. Using the scattering length approximation we find evidence for interpretation of the signal as a virtual state generated by the attractive effect of the $Σ_c^+ \bar{D}^0$ channel opening.

preprint2020arXivOpen access
Jorge A. Silva-Castro
hep-ph
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Jorge A. Silva-Castro

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