Jul 26 – 30, 2021
US/Eastern timezone

Progress on the extraction of parton distributions from Ioffe time distributions

Jul 27, 2021, 2:00 PM
15m
Oral presentation Hadron Structure Hadron Structure

Speaker

Savvas Zafeiropoulos (Aix Marseille Univ. & CNRS)

Description

The light-cone definition of Parton Distribution Functions (PDFs) does not allow for a direct ab initio determination employing methods of Lattice QCD simulations that naturally take place in Euclidean spacetime. In this presentation we focus on pseudo-PDFs where the starting point is the equal time hadronic matrix element with the quark and anti-quark fields separated by a finite distance. We focus on Ioffe-time distributions, which are functions of the Ioffe-time ν, and can be understood as the Fourier transforms of parton distribution functions with respect to the momentum fraction variable $x$. We present lattice results for the case of the nucleon addressing the physical point and continuum extrapolations. We also incorporate our lattice data in the NNPDF framework treating them on the same footing as experimental data and discuss in detail the different sources of systematics in the determination of the non-singlet PDFs.

Primary authors

Luigi Del Debbio (The University of Edinburgh (GB)) Tommaso Giani (University of Edinburgh) Balint Joo (Oak Ridge National Laboratory) Joseph Karpie (Columbia University in the City of New York) Konstantinos Orginos (William & Mary) Anatoly Radyushkin (Old Dominion University ) David Richards (Jefferson Lab) Savvas Zafeiropoulos (Aix Marseille Univ. & CNRS)

Presentation materials