Regular Article - Theoretical Physics
Hidden-charmonium decays of Z c (3900) and Z c (4025) in intermediate meson loops model
Department of Physics, Qufu Normal University, Qufu, 273165, People’s Republic of China
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Revised: 9 October 2013
Published online: 5 November 2013
The BESIII collaboration reported an observation of two charged charmonium-like structure and in e + e −→(J/ψπ)± π ∓ and at 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 and via intermediate D (∗) D (∗) meson loops. Reasonable results for the branching ratios by taking appropriate values of α 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 measurements on these hidden-charmonium decays and search for the decays of . and , which will help us investigate the decays deeply.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2013