Speaker
Yang Li
(University of Science and Technology of China)
Description
We investigate the two-photon transitions $c\bar c \to \gamma^*\gamma$ of the charmonium system in light-front dynamics. The light-front wave functions were obtained from solving the effective Hamiltonian based on light-front holography and one-gluon exchange interaction within the basis light-front quantization approach. We compute the two-photon transition form factors as well as the two-photon decay widths for S- and P-wave charmonia $\eta_c$ and $\chi_{cJ}$. Without introducing any free parameters, our predictions are in good agreement with the recent experimental measurements by BaBar and Belle, shedding lights on the relativistic nature of charmonium.
Authors
Yang Li
(University of Science and Technology of China)
Meijian Li
(University of Jyväskylä)
James Vary
(Iowa State University)
