Investigations on the light hadron decays of Zb (10610) and Zb (10650)

The light hadron decay processes of Z(b)(10610)/Z(b)(10650) provide us a way to study their nature and decay mechanism. In this work, we evaluate the branching ratios of Z(b)(10610)/Z(b)(10650) -> VP (V and P stand for light vector and pseudoscalar mesons, respectively) using an effective Lagrangian approach, in which the contributions of intermediate bottomed meson triangle loops are considered. In our calculations, the Z(b)(10610) and Z(b)(10650) thorn are regarded as B*(B) over bar* + c:c: and B*(B) over bar* molecular states, respectively. The predicted branching ratios of Z(b)(10610) -> VP are about in the order of 10-2, while the branching ratios of Z(b)(10610) -> VP are in the order of 10(-3). Furthermore, the dependence of these ratios between different decay modes of Z(b)(10610)/Z(b)(10650) thorn on the mixing eta -eta' angle theta(P) is investigated, which may be a good quantity for the experiments. It is hoped that the calculations here could be tested by future experiments.

Automated summary

The light hadron decay processes of Z(b)(10610)/Z(b)(10650) were studied to understand their nature and decay mechanism. The branching ratios of Z(b)(10610)/Z(b)(10650) -> VP (V and P represent light vector and pseudoscalar mesons, respectively) were evaluated using an effective Lagrangian approach, taking into account the contributions of intermediate bottomed meson triangle loops. The Z(b)(10610) and Z(b)(10650) were considered as B*(B) over bar* + c:c: and B*(B) over bar* molecular states, respectively. The predicted branching ratios of Z(b)(10610) -> VP were in the order of 10-2, while the branching ratios of Z(b)(10610) -> VP were in the order of 10(-3). The dependence of these ratios on the mixing angle theta(P) was also investigated, which could be an important parameter for experiments. It is hoped that these calculations can be tested in future experiments.