Speaker
Xiang Gao
(CCNU)
Description
We present the first lattice calculation of pion valence parton distribution using matching formula at NNLO level. We use the Wilson-Clover fermion on three 2+1 flavor HISQ ensembles of lattice spacings a = 0.04, 0.06 and 0.076 fm, with two pion mass including the physical one. Two unitary Domain-Wall calculations at physical point are also presented. This allows us to control the continuum limit, quark mass effects as well as the chiral symmetry. Our analysis use ratio-based schemes to renormalize the equal-time bilocal quark-bilinear matrix elements. We extract first few moments model independently and reconstruct the x-dependent PDF.
Primary authors
Xiang Gao
(CCNU)
Dr
Swagato Mukherjee
(Brookhaven National Laboratory)
Dr
Peter Petreczky
(Brookhaven National Laboratory)
Luchang Jin
Dr
Nikhil Karthik
(Brookhaven National Laboratory)
Prof.
Sergey Syritsyn
(Stony Brook University)
Yong Zhao
(Argonne National Laboratory)