Investigations on the charmless decays of Y(4260)Supported by National Natural Science Foundation of China (11275113,11205164)
Gang Li (State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China, Department of Physics, Qufu Normal University, Qufu 273165, China); Chun-Sheng An (Institute of High Energy Physics, and Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049, China); Peng-Yu Li (Department of Physics, Qufu Normal University, Qufu 273165, China); Di Liu (Department of Physics, Qufu Normal University, Qufu 273165, China); Xiao Zhang (Department of Physics, Qufu Normal University, Qufu 273165, China); et al - Show all 6 authors
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.