Analysis of the Tcs(2900) and related tetraquark states with the QCD sum rules
Xiao-Song Yang, Xin Qi, Zhi-Gang Wang
Abstract
In this research, we tentatively assign the [Formula: see text] as the [Formula: see text]-type tetraquark state, and study the mass spectrum of the tetraquark states with strange and doubly strange, which have the spin-parity [Formula: see text], [Formula: see text] and [Formula: see text], in the framework of the QCD sum rules in details, where the [Formula: see text] denotes the axialvector-diquark state. The predicted mass [Formula: see text] is consistent with the experimental values [Formula: see text] and [Formula: see text] from the LHCb collaboration and supports assigning the [Formula: see text] to be the [Formula: see text]-type scalar [Formula: see text] tetraquark state. The predictions for other tetraquark states can be confronted to the experimental data in the future to diagnose the nature of the fully open flavor exotic states.