Quasi parton distributions and the gradient flow

A bstract We propose a new approach to determining quasi parton distribution functions (PDFs) from lattice quantum chromodynamics. By incorporating the gradient flow, this method guarantees that the lattice quasi PDFs are finite in the continuum limit and evades the thorny, and as yet unresolved, is...

Full description

Saved in:
Bibliographic Details
Published in:The journal of high energy physics 2017-03, Vol.2017 (3), p.1-15, Article 116
Main Authors: Monahan, Christopher, Orginos, Kostas
Format: Article
Language:English
Subjects:
Classical and Quantum Gravitation
Continuums
Elementary Particles
Evolution
Gradient flow
High energy physics
Kernels
Lattice QCD
Lattice Quantum Field Theory
Lattices
Mathematical analysis
Nucleons
Partons
Physics
Physics and Astronomy
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
String Theory
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A bstract We propose a new approach to determining quasi parton distribution functions (PDFs) from lattice quantum chromodynamics. By incorporating the gradient flow, this method guarantees that the lattice quasi PDFs are finite in the continuum limit and evades the thorny, and as yet unresolved, issue of the renormalization of quasi PDFs on the lattice. In the limit that the flow time is much smaller than the length scale set by the nucleon momentum, the moments of the smeared quasi PDF are proportional to those of the lightfront PDF. We use this relation to derive evolution equations for the matching kernel that relates the smeared quasi PDF and the light-front PDF.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP03(2017)116