Investigations on the charmless decays of Y(4260)

Abstract

Apart from the charmful decay channels of Y(4260), the charmless decay channels of Y(4260) also provide us a good platform to study the nature and the decay mechanism of Y(4260). In this paper, we propose to probe the structure of Y(4260) through the charmless decays Y(4260)→VP via intermediate meson loops, where V and P stand for light vector and pseudoscalar mesons, respectively. Under the molecule ansatz of Y(4260), the predicted total branching ratio BRVP for all Y(4260)→VP processes are about (0.34+0.32−0.23)% to (0.75+0.72−0.52)% with the cutoff parameter α = 2−3. Numerical results show that the intermediate meson loops may be a possible transition mechanism in the Y(4260)→VP decays. These predicted branching ratios are the same order to that of Y(4260)→Z+c(3900)π−, which may be an evidence of D1D molecule and can be examined by the forthcoming BESIII data in the near future.