Molecular states in D_(s)^(*)+=^_(c)^(′,*)systems^(*)

The possible hadronic molecules in D_(S)^(∗)+Ξ_(c)(′,∗)systems with J^(P)=1/2−,3/2−,and 5/2−are investigated with interactions described by light meson exchanges.By varying the cutoff in a phenomenologically reasonable range of 1−2.5 GeV,we find ten near-threshold(bound or virtual)states in the single-channel case.After introducing the coupled-channel dynamics of D_(+)^(s)Ξ_(c)-D_(s)^(+)Ξ′c-D_(s)^(∗+)Ξ_(c-)D_(s)^(+)Ξ_(c)^(*)-D_(s)^(∗)+sΞ′_(c)-D_(s)^(∗)Ξ_(c)^(∗)systems,these states,except those below the lowest channels in each JP sector,move into the complex energy plane and become resonances in the mass range 4.43−4.76 GeV.Their spin-parities and nearby thresholds are 1/2−(D_(s)^(+)Ξ′_(c)),1/2^(−)(D_(s)^(++)Ξ_(c)^(*)),1/2−(D_(s)^(∗+)Ξ_(c)),1/2−(D_(s)^(∗+)Ξ_(c)^(′)),1/2−(D_(s)^(∗+)Ξ_(c)^(∗)),3/2−(D_(s)^(∗+)(Ξc),3/2−(D_(s)^(+)Ξ_(c)),3/2−(D_(s)^(∗+)Ξ′c),3/2−(D_(+s)^(∗)Ξ_(c)^(∗)),and 5/2−(D_(s)^(∗+)Ξ_(c)^(∗)).The impact of theδ(r)-term in the one-boson-exchange model on these states is presented.SettingΛ=1.5 GeV as an illustrative value,it is found that 1/2−(D_(s)^(*+)Ξ_(c))is a stable bound state(becoming unstable if the coupling to lower channels is turned on),1/2−(D∗+sΞc)and 3/2−(D_(s)^(∗+)Ξ_(c))are physical resonances in cases where theδ(r)-term is included or excluded,and the other seven states are physical resonances or"virtual-state-like"poles near thresholds,depending on whether theδ(r)-term is included.In addition,the partial decay widths of the physical resonances are provided.These double-charm hidden-strangeness pentaquark states,as the partners of the experimentally observed Pc and Pcs states,can be searched for in the D(∗)Λ_(c)final states in the future.