Hidden-charmonium decays of Z(c)(3900) and Z(c)(4025) in intermediate meson loops model

作者：Li Gang^*

来源：European Physical Journal C, 2013, 73(11): 2621.

DOI：10.1140/epjc/s10052-013-2621-5

The BESIII collaboration reported an observation of two charged charmonium-like structure Z(c)(+/-)(3900) and Z(c)(+/-)(4025) in e(+)e(-) -> (J/psi pi)(+/-)pi(-/+) and e(+)e(-) -> (D*(D) over bar*)(+/-)pi(-/+) at root s = 4.26 GeV recently, which could be an analogue of Z(b)(10610) and Z(b)(10650) claimed by the Belle Collaboration. In this work, we investigate the hidden-charmonium transitions of Z(c)(+/-)(3900) and Z(c)(+/-)(4025) via intermediate D-(*()) D-(*()) meson loops. Reasonable results for the branching ratios by taking appropriate values of a in this model can be obtained, which shows that the intermediate D-(*()) D-(*()) meson loops process may be a possible mechanism in these decays. Our results are consistent with the power-counting analysis, and comparable with the calculations in the framework of nonrelativistic effective field theory to some extent. We expect more experimental me

• 出版日期2013-11-5
• 单位曲阜师范大学