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

2013/04/30 by Gang Li
Physics and Astronomy · #hep-ph

paper · pdf · doi:10.1140/epjc/s10052-013-2621-5

8 pages, 9 figures; Accepted by Eur. Phys. J. C. arXiv admin note: text overlap with arXiv:1212.3784

arxiv created 2013/10/25 · arxiv updated 2015/06/15

Abstract

The BESIII collaboration reported an observation of two charged charmonium-like structure Z_c^±(3900) and Z_c^±(4025) in e⁺e^- → (J/ψπ)^± π^∓ and e⁺e^- → (D^* D^*)^± π^∓ at √ 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 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→ D D^* +c.c. and Z_c^′ → D^* D^*, which will help us investigate the Z_c^(′) decays deeply.

Citations

• Z_b/Z_b^′ → Υπ and h_b π decays in intermediate meson loops model