7-11 September 2020
Center for Nuclear Femtography (SURA) and Center for Frontiers in Nuclear Science (SBU/BNL)
US/Eastern timezone

Proton GPDs from lattice QCD

7 Sep 2020, 09:30



Martha Constantinou (Temple University)


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).

Primary 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)

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