Speaker
Qi Shi
(Brookhaven Nation Laboratory)
Description
We present a Lattice QCD calculation of the generalized parton distributions (GPDs) for the pion. Focusing on the zero skewness, we obtain the matrix elements from both symmetric and asymmetric kinematic frames with the recently proposed Lorentz-invariant definition. The calculations are performed using a single ensemble of $N_f=2+1$ highly-improved staggered quarks with $m_\pi = 300$ MeV and a lattice spacing $a=0.04$ fm. We extract the first few Mellin moments of GPDs using the ratio-scheme renormalization with the short distance factorization (SDF). Additionally, we also use a hybrid-scheme renormalization with perturbative matching to obtain the light-cone GPDs.
Primary author
Qi Shi
(Brookhaven Nation Laboratory)
