Speaker
Martha Constantinou
(Temple University)
Description
We will present new results of the proton unpolarized and helicity GPDs, within lattice QCD. Their x-dependence is extracted using the quasi-distribution method, which requires matrix elements of moving hadrons coupled with non-local operators. We use momentum boost up to 1.67 GeV, and momentum transfer squared up to 1 GeV^2. The calculation is performed on an Nf=2+1+1 ensemble of twisted mass fermions with a clover improvement, reproducing a pion mass of 260 MeV. The quasi-GPDs are matched to their light-cone counterparts using one-loop perturbation theory within Large Momentum Effective Theory (LaMET).
Authors
Constantia Alexandrou
(University of Cyprus & The Cyprus Institute)
Krzysztof Cichy
(Adam Mickiewicz University)
Martha Constantinou
(Temple University)
Kyriakos Hadjiyiannakou
(University of Cyprus)
Karl Jansen
(NIC, DESY)
Aurora Scapellato
(Adam Mickiewicz University)
Fernanda Steffens
(University of Bonn)
