Higher-twist corrections to the D → π, K form factors from light-cone sum rules

We calculate the D→P transition form factors within the framework of the light-cone QCD sum rules(LCSR) with the D-meson light-cone distribution amplitudes(LCDAs).The next-to-leading power(NLP) corrections to the vacuum-to-D-meson correlation function are considered,and the NLP corrections from the high-twist Dmeson LCD As and the SU(3) breaking effect from a strange quark mass are investigated.Adopting the exponential model of the D-meson LCD As,the SU(3) flavor symmetry breaking effects are predicted as RSU(3))=1.12 and RSU(3))~T=1.39,respectively,confirming the results obtained from LCSR with pion LCD A.The numerical predictions of the form factors show that the contribution from two-particle higher-twist contributions is of great importance and the uncertainties are dominated by the inverse moment of φ~+(ω,μ).With the obtained form factors,the predicted Cabibbo-Kobayashi-Maskawa(CKM) matrix elements are |V|=0.151||and|V|=0.89||.