$D\to P(\pi ,K)$ helicity form factors within light-cone sum rule approach

Hai-Bing Fu, Wei Cheng, Rui-Yu Zhou +1

In this paper, the $D\to P(\pi ,K)$ helicity form factors (HFFs) are studied by applying the QCD light-cone sum rule (LCSR) approach. The calculation accuracy is up to next-to-leadin…