Understanding the ηcρ decay mode of Zc() via the triangle loop mechanism

Xiao, Cheng-Jian (Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China) ; Chen, Dian-Yong (School of Physics, Southeast University, Nanjing 210094, People’s Republic of China) ; Dong, Yu-Bing (Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China) ; Zuo, Wei (Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China) ; Matsuki, Takayuki (Tokyo Kasei University, 1-18-1 Kaga, Itabashi, Tokyo 173-8602, Japan) (Theoretical Research Division, Nishina Center, RIKEN, Wako, Saitama 351-0198, Japan)

09 April 2019

Abstract: Recently, the BESIII Collaboration reported a new measurement of the ηcρ decay mode of Zc(), which motivated us to study the inner structure of Zc() via investigating the hidden charm decays of these two Zc states. We consider the triangle loop mechanism contribution in the hidden charm decays of Zc(). Our estimations indicate that the triangle loop mechanism plays an important role in the decays of the Zc(), where our results are in agreement with the experimental observations in a reasonable parameter range. Furthermore, we point out that the Zc() can be interpreted as the hadronic molecules, while the tetraquark scenario is less favored.


Published in: Physical Review D 99 (2019)
Published by: APS
DOI: 10.1103/PhysRevD.99.074003
arXiv: 1811.04688
License: CC-BY-4.0



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