Production of Zcs in B and Bs decays

In the present work, we investigate the productions of Z(cs)(+) in B+ and B-s(0) decays, where Z(cs)(+) is assigned as a D-s(+) (D) over bar*(0)+ D-s*+ (D) over bar (0) molecular state. By using an effective Lagrangian approach, we evaluate the branching fractions of B-s(0) -> K- Z(cs)(+) and B+ -> phi Z(cs)(+) via the triangle loop mechanism. The estimated branching fractions of B-s(0) -> K- Z(cs)(+) and B+ -> phi Z(cs)(+) are of the order of 10(-4) and 10(-5), respectively. The ratio of these two branching fractions is estimated to be about 4, which indicate that the B-s(0) -> K-+/- Z(cs)(-/+) -> K+ K- J/psi may be a better process of searching Z(cs) and accessible for further experimental measurements of the Belle II and LHCb Collaborations.

Automated summary

In this study, we investigate the production of Z(cs)(+) in B+ and B-s(0) decays and evaluate the branching fractions using an effective Lagrangian approach. The estimated branching fractions of B-s(0) -> K- Z(cs)(+) and B+ -> phi Z(cs)(+) are of the order of 10(-4) and 10(-5), respectively. The ratio of these two branching fractions suggests that the B-s(0) -> K-+/- Z(cs)(-/+) -> K+ K- J/psi process may be a better way to search for Z(cs) and is accessible for further experimental measurements by the Belle II and LHCb Collaborations.