Speaker
Description
Studying hadrons can be challenging due to the non-perturbative nature of QCD. Parton Distribution Functions (PDFs), and their generalization Generalized Parton Distributions (GPDs), are objects that carry information about how quarks and gluons are distributed in hadrons such as protons and neutrons. The computation of GPDs from both theory and experiments is challenging, therefore extracting them from direct simulations of the theory on the Lattice is crucial. In this talk we present the PDFs and GPDs of the nucleon using an ensemble of $N_f$=2+1+1 twisted mass clover-improved fermions with masses tuned to their physical values and lattice spacing of $a=0.080$ fm. We analyze seven momentum boosts up to $P_z=1.69$ GeV and momentum transfer $-t$ up to $1.2 ~ \textrm{GeV}^2$. We explore both LaMET and Short Distance Factorization to obtain the light-cone PDFs and GPDs and their moments, respectively. We study the GPDs in the so-called "asymmetric frame", that allows for more efficient computation of multiple $-t$. Within the LaMET framework, we investigate an alternative method for the reconstruction of the x-dependent quasi-distributions using Bayes-Gauss-Fourier Transform and compare it to Backus-Gilbert.