First Lattice QCD Study of Proton Twist-3 GPDs

Understand

We present first results on selected twist-3 quark GPDs using the quasi-distribution method.

• This approach relates lattice QCD data and light-cone distribution functions using Large Momentum Effective Theory (LaMET).
• We calculate quark-antiquark correlators of boosted nucleons coupled to non-local operators with vector and axial Dirac structure, which is transverse to the momentum boost.
• We use three values of the momentum boost, namely 0.83, 1.25, 1.67 GeV.