https://doi.org/10.1140/epjc/s10052-013-2482-y
Regular Article - Theoretical Physics
Effects of heavy meson loops on heavy quarkonium radiative transitions
1
Department of Physics, Qufu Normal University, Qufu, 273165, P.R. China
2
Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, 100871, P.R. China
* e-mail: gli@mail.qfnu.edu.cn
Received:
12
March
2013
Revised:
5
June
2013
Published online:
2
July
2013
Radiative transitions between charmonium states offer an insight into the internal structure of heavy quark bound states within QCD. In this work, we systematically investigate the coupled-channel effects of intermediate charmed mesons to charmonium radiative transitions utilizing an effective Lagrangian approach. Our results show that the coupled-channel effects of these decays under the open charm thresholds are relatively weak, while the coupled-channel effects of the excited P-wave states close to the charmed pairs thresholds are relatively important.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2013
