Analysis of the Tcs(2900) and related tetraquark states with the QCD sum rules

In this research, we tentatively assign the T-cs(-)(2900) as the A(-)A-type tetraquark state, and study the mass spectrum of the tetraquark states with strange and doubly strange, which have the spin-parity J(P) = 0(+), 1(+) and 2(+), in the framework of the QCD sum rules in details, where the A denotes the axialvector-diquark state. The predicted mass M = 2:92 +/- 0:12 GeV is consistent with the experimental values M - 2:892 +/- 0:014 +/- 0:015 GeV and 2:921 +/- 0:017 +/- 0:020 GeV from the LHCb collaboration and supports assigning the Tcs(-) (2900) to be the A(-)A-type scalar c(-)sq(-)q 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 avor exotic states.