https://doi.org/10.1140/epjc/s10052-013-2576-6
Regular Article - Theoretical Physics
Evasion of HSR in S-wave charmonium decaying to P-wave light hadrons
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
3
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, P.R. China
4
Theoretical Physics Center for Science Facilities, CAS, Beijing, 100049, P.R. China
* e-mail: gli@mail.qfnu.edu.cn
Received:
21
June
2013
Revised:
23
August
2013
Published online:
25
September
2013
The S-wave charmonium decaying to a P-wave and S-wave light hadron pairs are supposed to be suppressed by the helicity selection rule in the perturbative QCD framework. With an effective Lagrangian method, we show that the intermediate charmed meson loops can provide a possible mechanism for the evasion of the helicity selection rule, and result in sizeable decay branching ratios in some of those channels. The theoretical predictions can be examined by the forthcoming BES-III data in the near future.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2013
