Interpretations of the new LHCb Pc(4337)+ pentaquark state.

Recently the LHCb Collaboration has observed a new pentaquark state, the P c (4337) + . Owing to its proximity to the χ c 0 (1 S) p , D ¯ ∗ Λ c , D ¯ Σ c and D ¯ Σ c ∗ thresholds, this new pentaquark might very well be a meson–baryon bound state. However its spin and parity have not been determined yet and none of the previous possibilities can be ruled out.We briefly explore a few of these options and the consequences they entail in the present manuscript: (i) the P c (4337) + might be a χ c 0 (1 S) p bound state, (ii) the P c (4312) + and P c (4337) + might be D ¯ ∗ Λ c and D ¯ Σ c states close to threshold, respectively, where the Breit–Wigner mass might not correspond to the location of the poles, (iii) the locations of the P c (4312) + and P c (4337) + might be explained in terms of the D ¯ ∗ Λ c - D ¯ Σ c and D ¯ ∗ Λ c - D ¯ Σ c ∗ coupled channel dynamics. This last option, though not the most probable explanation, is still potentially compatible with the double peak solution of the P cs (4459) 0 and with what we know of the P c (4312) + . As a byproduct of the previous explorations, we conjecture the existence of a series of anticharmed meson – antitriplet charmed baryon bound states and calculate their masses. [ABSTRACT FROM AUTHOR]