Higher-twist corrections to the form factors from light-cone sum rules * *Supported in part by the National Natural Science Foundation of China (11675082, 11735010) and the Natural Science Foundation of Tianjin (19JCJQJC61100)

Abstract

We calculate the 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 D-meson LCDAs and the SU(3) breaking effect from a strange quark mass are investigated. Adopting the exponential model of the D-meson LCDAs, the SU(3) flavor symmetry breaking effects are predicted as and , respectively, confirming the results obtained from LCSR with pion LCDA. 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 . With the obtained form factors, the predicted Cabibbo-Kobayashi-Maskawa (CKM) matrix elements are and .