Hidden charm hadronic molecule with strangeness Pcs∗ (4739) as a ςc D ¯ K ¯ bound state HIDDEN CHARM HADRONIC MOLECULE with STRANGENESS ... WU, PAN, LIU, LU, GENG, and LIU

Motivated by the recent discovery of the first hidden charm pentaquark state with strangeness Pcs(4459) by the LHCb Collaboration, we study the likely existence of a three-body ςcD¯K̄ bound state, which shares the same minimal quark content as Pcs(4459). The ςcD¯ and DK interactions are determined by reproducing Pc(4312) and Ds0∗(2317) as ςcD¯ and D¯K̄ molecules, respectively, while the ςcK̄ interaction is constrained by chiral effective theory. We indeed find a three-body bound state by solving the Schrödinger equation using the Gaussian expansion method, which can be viewed as an excited hidden charm exotic state with strangeness, Pcs∗(4739), with I(JP)=1(1/2+) and a binding energy of 77.8-10.3+25 MeV. We further study its strong decays via triangle diagrams and show that its partial decay widths into DΞc′ and Ds∗ςc are of a few tens of MeV, with the former being dominant.