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Compact $$ssscbar c$$ pentaquark states predicted by a quark model

コンパクトな$$ssscbar c$$ペンタクォークのクォークモデルによる予言

Meng, Q.*; 肥山 詠美子*; Can, K. U.*; Gubler, P.; 岡 眞 ; 保坂 淳; Zong, H.*

Meng, Q.*; Hiyama, Emiko*; Can, K. U.*; Gubler, P.; Oka, Makoto; Hosaka, Atsushi; Zong, H.*

Several compact $$ssscbar c$$ pentaquark resonances are predicted in a potential quark model. The Hamiltonian is the best available one, which reproduces the masses of the low-lying charmed and strange hadrons well. Full five-body calculations are carried out by the use of the Gaussian expansion method, and the relevant baryon-meson thresholds are taken into account explicitly. Employing the real scaling method, we predict four sharp resonances, $$J^P=1/2^-$$ ($$E$$ = 5180 MeV, $$Gamma$$ = 20 MeV) and others. These are the candidates of compact pentaquark resonance states from the current best quark model, which should be confirmed either by experiments or lattice QCD calculations.

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