https://doi.org/10.1140/epjc/s10052-019-7274-6
Regular Article - Theoretical Physics
Effects of heavy meson loops on higher charmonia radiative transitions
1
College of Physics and Engineering, Qufu Normal University, Qufu, 273165, People’s Republic of China
2
School of Physical Science and Technology, Southwest University, Chongqing, 400715, China
* e-mail: gli@qfnu.edu.cn
Received:
18
August
2019
Accepted:
3
September
2019
Published online:
11
September
2019
Radiative transitions between charmonium states offer an insight into the internal structure of heavy quark bound states within QCD. In this work, we performed a systematically investigation of the radiative transitions of 
and 
via intermediate charmed meson loop with a non-relativistic effective field theory. We only focus on the line-shape behavior of the distributions via different intermediate meson loops. Our results show that the coupled-channel effects of these decays are relatively weak, while the coupled channel effects has obvious enhancement when the inial (final) states are closed to the thresholds of charmed-mesons pair.
© The Author(s), 2019
