Regular Article - Theoretical Physics
Spectrum of the hidden charm pentaquark with an SU(4) flavor-spin hyperfine interaction
Université de Liège, Institut de Physique, B.5, Sart Tilman, 4000, Liège 1, Belgium
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Accepted: 9 November 2019
Published online: 21 November 2019
We study a few of the lowest states of the pentaquark , of positive and negative parity, in a constituent quark model with an SU(4) flavor-spin hyperfine interaction. For positive parity we introduce space wave functions of appropriate permutation symmetry with one unit of orbital angular momentum in the internal motion of the four-quark subsystem or an orbital excitation between the antiquark and the four quark subsystem which remains in the ground state. We show that the lowest positive parity states are provided by the first alternative and are located below the and the states with all quarks in the ground state. We compare our results with the LHCb three narrow pentaquark structures reported in 2019.
© The Author(s), 2019