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Title: Gluon pseudo-distributions at short distances: Forward case

Abstract

We present the results that are necessary in the ongoing lattice calculations of the gluon parton distribution functions (PDFs) within the pseudo-PDF approach. We give a classification of possible two-gluon correlator functions and identify those that contain the invariant amplitude determining the gluon PDF in the light-cone $z^2$ -> 0 limit. One-loop calculations have been performed in the coordinate representation and in an explicitly gauge-invariant form. We made an effort to separate ultraviolet (UV) and infrared (IR) sources of the ln ($-z^2$)-dependence at short distances $z^2$. The UV terms cancel in the reduced Ioffe-time distribution (ITD), and we obtain the matching relation between the reduced ITD and the light-cone ITD. Using a kernel form, we get a direct connection between lattice data for the reduced ITD and the normalized gluon PDF. We also show that our results may be used for a rather straightforward calculation of the one-loop matching relations for quasi-PDFs.

Authors:
; ORCiD logo; ORCiD logo
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1638534
Alternate Identifier(s):
OSTI ID: 1644311
Report Number(s):
JLAB-THY-19-3087; DOE-OR-23177-4803; arXiv:1910.13963
Journal ID: ISSN 0370-2693; S037026932030424X; 135621; PII: S037026932030424X
Grant/Contract Number:  
AC05-06OR23177; FG02-97ER41028
Resource Type:
Published Article
Journal Name:
Physics Letters B
Additional Journal Information:
Journal Name: Physics Letters B Journal Volume: 808 Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Balitsky, Ian, Morris, Wayne, and Radyushkin, Anatoly. Gluon pseudo-distributions at short distances: Forward case. Netherlands: N. p., 2020. Web. https://doi.org/10.1016/j.physletb.2020.135621.
Balitsky, Ian, Morris, Wayne, & Radyushkin, Anatoly. Gluon pseudo-distributions at short distances: Forward case. Netherlands. https://doi.org/10.1016/j.physletb.2020.135621
Balitsky, Ian, Morris, Wayne, and Radyushkin, Anatoly. Tue . "Gluon pseudo-distributions at short distances: Forward case". Netherlands. https://doi.org/10.1016/j.physletb.2020.135621.
@article{osti_1638534,
title = {Gluon pseudo-distributions at short distances: Forward case},
author = {Balitsky, Ian and Morris, Wayne and Radyushkin, Anatoly},
abstractNote = {We present the results that are necessary in the ongoing lattice calculations of the gluon parton distribution functions (PDFs) within the pseudo-PDF approach. We give a classification of possible two-gluon correlator functions and identify those that contain the invariant amplitude determining the gluon PDF in the light-cone $z^2$ -> 0 limit. One-loop calculations have been performed in the coordinate representation and in an explicitly gauge-invariant form. We made an effort to separate ultraviolet (UV) and infrared (IR) sources of the ln ($-z^2$)-dependence at short distances $z^2$. The UV terms cancel in the reduced Ioffe-time distribution (ITD), and we obtain the matching relation between the reduced ITD and the light-cone ITD. Using a kernel form, we get a direct connection between lattice data for the reduced ITD and the normalized gluon PDF. We also show that our results may be used for a rather straightforward calculation of the one-loop matching relations for quasi-PDFs.},
doi = {10.1016/j.physletb.2020.135621},
journal = {Physics Letters B},
number = C,
volume = 808,
place = {Netherlands},
year = {2020},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1016/j.physletb.2020.135621

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