Roles of the Tcs¯0(2900)0 and

Abstract

Motivated by the recent LHCb observations of Tcs¯0(2900)0 and Tcs¯0(2900)++ in the processes B0→D¯0Ds+π− and B+→D−Ds+π+, we have investigated the decay B−→Ds+K−π− by taking into account the contributions from the S-wave vector-vector interactions, and the S-wave Ds+K− interactions. Our results show that the Ds+K− invariant mass distribution has an enhancement structure near the threshold, associated with the D0*(2300), which is in good agreement with the Belle measurements. We have also predicted the Ds+π− invariant mass distribution and the Dalitz plot, which show the significant signal of the Tcs¯0(2900). With the same formalism, the Ds−Ks0 invariant mass distribution of the process B0→Ds−Ks0π+ measured by Belle could be well reproduced, and the peak of Tcs¯0(2900) is expected to be observed around 2900 MeV in the Ds−π+ invariant mass distribution. Our results could be tested by the Belle II and LHCb experiments in the future. Published by the American Physical Society 2024