Speaker
Long-Bin Chen
(Guangzhou University)
Description
In this talk, I will present our recent work on two-loop QCD corrections to pion electromagnetic form factors with large momentum transfer.
We explicitly verify the validity of the collinear factorization to two-loop order for this observable, and obtain the respective IR-finite two-loop hard-scattering kernel in the closed form.
Incorporating this new ingredient of correction, we make a comprehensive comparison between the theoretical predictions and pion form factor measurements in both space-like and time-like regions.
Our phenomenological analysis provides constraint on the second Gegenbauer moment of the pion light-cone distribution amplitude
obtained from recent lattice QCD studies.
