中文摘要：

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 D1D+c.c. 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 D1D+c.c. 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 D1 D molecule and can be examined by the forthcoming BESdata in the near future.

英文摘要：

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 D1D＋c.c. 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 D1D＋c.c. 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 D1 D molecule and can be examined by the forthcoming BESdata in the near future.