nucl-th digest · May 7, 2021

Hidden charm tetraquark states in a diquark model

Pan-Pan Shi🇨🇳 · Fei Huang🇨🇳 · Wen-Ling Wang🇨🇳

The purpose of the present study is to explore the mass spectrum of the hidden charm tetraquark states within a diquark model. Proposing that a tetraquark state is composed of a diquark and an antidiquark, the masses of all possible $[q c] [q ˉ c ˉ]$ , $[sc] [s ˉ c ˉ]$ , and $[q c] [s ˉ c ˉ]$ $([sc] [q ˉ c ˉ])$ hidden charm tetraquark states are systematically calculated by use of an effective Hamiltonian, which contains color, spin, and flavor dependent interactions. Apart from the $X (3872)$ , $Z (3900)$ , $χ_{c 2} (3930)$ , and $X (4350)$ which are taken as input to fix the model parameters, the calculated results support that the $χ_{c 0} (3860)$ , $X (4020)$ , $X (4050)$ are $[q c] [q ˉ c ˉ]$ states with $I^{G} J^{P C} = 0^{+} 0^{++}$ , $1^{+} 1^{+-}$ , and $1^{-} 2^{++}$ , respectively, the $χ_{c 1} (4274)$ is an $[sc] [s ˉ c ˉ]$ state with $I^{G} J^{P C} = 0^{+} 1^{++}$ , the $X (3940)$ is a $[q c] [q ˉ c ˉ]$ state with $I^{G} J^{P C} = 1^{-} 0^{++}$ or $1^{-} 1^{++}$ , the $Z_{cs} (3985)^{-}$ is an $[sc] [q ˉ c ˉ]$ state with $J^{P} = 0^{+}$ or $1^{+}$ , and the $Z_{cs} (4000)^{+}$ and $Z_{cs} (4220)^{+}$ are $[q c] [s ˉ c ˉ]$ states with $J^{P} = 1^{+}$ . Predictions for other possible tetraquark states are also given.

↳ hep-phnucl-thPRD(2021)·56 citations

Friday·May 7, 2021

Hidden charm tetraquark states in a diquark model

Gamma production in neutrino interaction with nuclei

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