Inspired by the recent observation of the first doubly charmed tetraquark T_(cc),we apply the linear Regge relation and mass scaling to study low-lying mass spectra of the doubly heavy tetraquark in a heavy-diquark−li...Inspired by the recent observation of the first doubly charmed tetraquark T_(cc),we apply the linear Regge relation and mass scaling to study low-lying mass spectra of the doubly heavy tetraquark in a heavy-diquark−light-antidiquark picture.The measured data and other compatible estimates of ground-state masses of doubly heavy baryons are employed to evaluate masses of heavy diquark M_(QQ)(Q=c,b)and the D/D_(s) meson masses are used in mass scaling to determine the hyperfine mass splitting.Our mass computation indicates that all low-lying states of doubly heavy tetraquarks are unstable against strong decays to two heavy-light mesons,except for the ground states of nonstrange bb tetraquarks.展开更多
基金Supported by the National Natural Science Foundation of China under the No.12165017.
文摘Inspired by the recent observation of the first doubly charmed tetraquark T_(cc),we apply the linear Regge relation and mass scaling to study low-lying mass spectra of the doubly heavy tetraquark in a heavy-diquark−light-antidiquark picture.The measured data and other compatible estimates of ground-state masses of doubly heavy baryons are employed to evaluate masses of heavy diquark M_(QQ)(Q=c,b)and the D/D_(s) meson masses are used in mass scaling to determine the hyperfine mass splitting.Our mass computation indicates that all low-lying states of doubly heavy tetraquarks are unstable against strong decays to two heavy-light mesons,except for the ground states of nonstrange bb tetraquarks.
