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

Twist-3 PDFs from lattice QCD: g_T(x)

11 Sep 2020, 11:20



Krzysztof Cichy (Adam Mickiewicz University)


We present a lattice exploration of the isovector flavor combination of the nucleon's twist-3 helicity PDF g_T(x), using twisted mass clover fermions. We employ the quasi-distribution approach at three values of the nucleon boost up to 1.7 GeV to connect the lattice-extracted matrix elements, renormalized in the RI/MOM scheme, to light-cone distributions, applying the matching procedure that we developed in parallel. We also calculate the twist-2 helicity distribution g_1(x) to test the Wandzura-Wilczek approximation for g_T(x) and find that it works well for a broad range of Bjorken-x.

Primary authors

Shohini Bhattacharya (Graduate Student) Krzysztof Cichy (Adam Mickiewicz University) Martha Constantinou (Temple University) Andreas Metz (Temple University) Aurora Scapellato (Adam Mickiewicz University) Fernanda Steffens (University of Bonn)

Presentation Materials