Neural Network Study of Hidden-Charm Pentaquark Resonances

Abstract

Recently, the LHCb experiment announced the observation of hidden-charm pentaquark states P<inf>c</inf>(4312), P<inf>c</inf>(4440), and P<inf>c</inf>(4457) near E<inf>c</inf>D and E<inf>c</inf>D∗ thresholds. In this present work, we studied these pentaquarks in the framework of the nonrelativistic quark model with four types of potential. We solved five-body Schr-dinger equation by using the artificial neural network method and made predictions of parities for these states, which are not yet determined by experiment. The mass of another possible pentaquark state near the D ∗E<inf>c</inf>∗ with Jp=5/2- is also calculated. © 2019 Institute of Physics Publishing.