Quasi-PDFs and Pseudo-PDFs

Conference · Mon May 01 00:00:00 EDT 2017

DOI:https://doi.org/10.2172/1985598· OSTI ID:1985598

Radyushkin, Anatoly ^[1]

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1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

We show that quasi-PDFs may be treated as hybrids of PDFs and primordial rest-frame momentum distributions of partons. This results in a complicated convolution nature of quasi-PDFs that necessitates using large momenta to get reasonably close to the PDF limit. As an alternative approach, we propose to use pseudo-PDFs that generalize the light-front PDFs onto spacelike intervals and are related to Ioffe-time distributions, the functions of the Ioffe time and the distance parameter with respect to which it displays perturbative evolution for small separations. In this form, one may divide out the dependence coming from the primordial rest-frame distribution and from the problematic factor due to lattice renormalization of the gauge link.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1985598
• Report Number(s): JLAB-THY-17-2477; DOE/OR/23177-4156
• Resource Relation: Conference: QCD Evolution 2017, Jefferson Lab, Newport News, VA, May 22, 2017
• Country of Publication: United States
• Language: English