Comprehending Isospin breaking effects of $X(3872)$ in a Friedrichs-model-like scheme

@article{Zhou2017ComprehendingIB,
  title={Comprehending Isospin breaking effects of \$X(3872)\$ in a Friedrichs-model-like scheme},
  author={Zhi-Yong Zhou and Zhiguang Xiao},
  journal={Physical Review D},
  year={2017},
  volume={97},
  pages={034011}
}
Recently, we have shown that the X(3872) state can be naturally generated as a bound state by incorporating the hadron interactions into the Godfrey-Isgur quark model using a Friedrichs-like model combined with the quark pair creation model, in which the wave function for the X(3872) as a combination of the bare cc¯ state and the continuum states can also be obtained. Under this scheme, we now investigate the isospin-breaking effect of X(3872) in its decays to J/ψπ+π- and J/ψπ+π-π0. By coupling… 
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