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

作　　者：Long-Sheng Lu Yong-Kang Huang Xuan-Heng Zhang 卢龙生;黄勇康;张轩珩(School of Physics,Nankai University,Tianjin 300071,China)

机构地区：[1]School of Physics,Nankai University,Tianjin 300071,China

出　　处：《Chinese Physics C》2021年第11期72-89,共18页中国物理C（英文版）

基　　金：the National Natural Science Foundation of China(11675082,11735010);the Natural Science Foundation of Tianjin(19JCJQJC61100)。

摘　　要：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 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 R+,0 SU(3)=1.12 and R T SU(3)=1.39,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 ofϕ+D(ω,μ).With the obtained form factors,the predicted Cabibbo-Kobayashi-Maskawa(CKM)matrix elements are|Vcd|=0.151+0.091−0.043|th.+0.017−0.02|exp.and|Vcs|=0.89+0.467−0.234|th.+0.008−0.008|exp..

关 键 词：light-cone sum rule semi-leptonic D decay higher-twist correction 

分 类 号：O572.243[理学—粒子物理与原子核物理]