Aug 8 – 13, 2022
Hörsaalzentrum Poppelsdorf
Europe/Berlin timezone

Chiral-even twist-3 GPDs for the proton

Aug 10, 2022, 5:10 PM
CP1-HSZ/Ground-0.010 - HS2 (CP1-HSZ)

CP1-HSZ/Ground-0.010 - HS2


Oral Presentation Hadron Structure Hadron Structure


Jack Dodson (Temple University)


"We present results on the chiral-even twist-3 quark GPDs for the proton using one ensemble of two degenerate light, a strange and a charm quark ($N_f=2+1+1$) of maximally twisted mass fermions with a clover term, corresponding to a pion mass of 260 MeV. We employ the quasi-distribution method which relates lattice matrix elements of non-local operators defined in coordinate space to the light-cone distributions in the momentum (x) space. The approach requires momentum-boosted proton states and a matching formalism computed in Large Momentum Effective Theory (LaMET). In our calculation, we use three values of the momentum boost, namely 0.83, 1.25, 1.67 GeV. The GPDs are defined in the symmetric (Breit) frame, which we implement here with 4-vector momentum transfer squared of 0, 0.69, and 1.39 GeV$^2$, all at zero skewness."

Primary authors

Jack Dodson (Temple University) Shohini Bhattacharya (Brookhaven National Lab) Krzysztof Cichy (Faculty of Physics, Adam Mickiewicz University) Martha Constantinou (Temple University) Andreas Metz (Temple University) Aurora Scapellato (Temple University) Fernanda Steffens (Helmholtz-Institut für Strahlen- und Kernphysik)

Presentation materials