Speaker
Zheng Cao
(Institute of High Energy Physics, Chinese Academy of Sciences)
Description
The E1 transitions of ψ(3686) and ψ(3770) → γχ_cJ are investigated in a non-relativistic effective field theory (NREFT) where the open charm effects are included systematically as the leading corrections. It also allows a self-consistent inclusion of the S-D mixing in the same framework. It shows that the open charm contributions are essential for understanding the significant deviations of the non-relativistic leading order calculations from the experimental data.
