Physical Review D
071503(R) (6 pp.)
We generalize the celebrated heavy quark expansion to nonlocal QCD operators. By taking nonlocal heavy-light current on the light-cone as an example, we confirm that the collinear singularities are common between QCD operator and the corresponding operator in heavy quark effective theory (HQET), at the leading power of 1/M expansion. Based on a perturbative calculation in operator form at one-loop level, a factorization formula linking QCD and HQET operators is investigated and the matching coefficient is determined. The matching between QCD and HQET light-cone distribution amplitudes (LCDAs) as well as other momentum distributions of hadron can be derived as a consequence.
Original Publication Citation
Zhao, S. (2020). Heavy quark expansion for heavy-light light-cone operators. Physical Review D, 101(7), 071503. doi:10.1103/PhysRevD.101.071503
Zhao, Shuai, "Heavy Quark Expansion for Heavy-Light Light-Cone Operators" (2020). Physics Faculty Publications. 419.