Strong decays of Tcs¯0a(2900)++/0 as a fully open-flavor tetraquark state

Abstract

We have studied the strong decay properties of the recently observed Tcs¯0a(2900)++/0 by considering it as a cud¯ s¯ / cdu¯ s¯ fully open-flavor tetraquark state with I(JP) = 1 (0 +) . In the framework of QCD sum rules, we have calculated the three-point correlation functions of the two-body strong decay processes Tcs¯0a(2900)++→Ds+π+ , D+K+,Ds∗+ρ+ and Ds1+π+ . The full width of Tcs¯0a(2900)++/0 is obtained as 161.7 ± 94.8 MeV, which is consistent with the experimental observation. We predict the relative branching ratios as Γ(T→Dsπ):Γ(T→DK):Γ(T→Ds∗ρ):Γ(T→Ds1π)≈1.00:1.10:0.04:0.43 , implying that the main decay modes of Tcs¯0a(2900)++/0 state are Dsπ and DK channels in our calculations. However, the P-wave decay mode Ds1π is also comparable and important by including the uncertainties. To further identify the nature of Tcs¯0a(2900)++/0 , we suggest confirming them in the DK and Dsπ final states, and measuring the above ratios in future experiments.