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

Regular Article - Theoretical Physics

Abstract

The BESIII collaboration reported an observation of two charged charmonium-like structure \(Z_{c}^{\pm}(3900)\) and \(Z_{c}^{\pm}(4025)\) in e + e →(J/ψπ)± π and \(e^{+}e^{-} \to(D^{*} \bar{ D}^{*})^{\pm} \pi^{\mp}\) at \(\sqrt{s} =4.26\) 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 \(Z_{c}^{\pm}(3900)\) and \(Z_{c}^{\pm}(4025)\) 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 \(Z_{c}\to D\bar{D}^{*} +c.c\). and \(Z_{c}^{\prime}\to D^{*} \bar{D}^{*}\), which will help us investigate the \(Z_{c}^{(\prime)}\) decays deeply.

Keywords

Spin Symmetry Invariant Mass Spectrum Belle Collaboration Partial Decay Width Charmed Meson 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

Author thanks F.-K. Guo, X.-H. Liu, Q. Wang and Q. Zhao for useful discussions. This work is supported, in part, by the National Natural Science Foundation of China (Grant No. 11275113).

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Copyright information

© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica 2013

Authors and Affiliations

  1. 1.Department of PhysicsQufu Normal UniversityQufuPeople’s Republic of China

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