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Title: Small-x asymptotics of the gluon helicity distribution

Abstract

Here, we determine the small-x asymptotics of the gluon helicity distribution in a proton at leading order in perturbative QCD at large N c. To achieve this, we begin by evaluating the dipole gluon helicity TMD at small x. In the process we obtain an interesting new result: in contrast to the unpolarized dipole gluon TMD case, the operator governing the small-x behavior of the dipole gluon helicity TMD is different from the operator corresponding to the polarized dipole scattering amplitude (used in our previous work to determine the small-x asymptotics of the quark helicity distribution).

Authors:
 [1];  [2]; ORCiD logo [3]
  1. The Ohio State Univ., Columbus, OH (United States)
  2. Penn State Univ.-Berks, Reading, PA (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1411358
Report Number(s):
LA-UR-17-25006
Journal ID: ISSN 1029-8479; TRN: US1800223
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Volume: 2017; Journal Issue: 10; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Atomic and Nuclear Physics

Citation Formats

Kovchegov, Yuri V., Pitonyak, Daniel, and Sievert, Matthew D. Small-x asymptotics of the gluon helicity distribution. United States: N. p., 2017. Web. doi:10.1007/JHEP10(2017)198.
Kovchegov, Yuri V., Pitonyak, Daniel, & Sievert, Matthew D. Small-x asymptotics of the gluon helicity distribution. United States. doi:10.1007/JHEP10(2017)198.
Kovchegov, Yuri V., Pitonyak, Daniel, and Sievert, Matthew D. Fri . "Small-x asymptotics of the gluon helicity distribution". United States. doi:10.1007/JHEP10(2017)198. https://www.osti.gov/servlets/purl/1411358.
@article{osti_1411358,
title = {Small-x asymptotics of the gluon helicity distribution},
author = {Kovchegov, Yuri V. and Pitonyak, Daniel and Sievert, Matthew D.},
abstractNote = {Here, we determine the small-x asymptotics of the gluon helicity distribution in a proton at leading order in perturbative QCD at large Nc. To achieve this, we begin by evaluating the dipole gluon helicity TMD at small x. In the process we obtain an interesting new result: in contrast to the unpolarized dipole gluon TMD case, the operator governing the small-x behavior of the dipole gluon helicity TMD is different from the operator corresponding to the polarized dipole scattering amplitude (used in our previous work to determine the small-x asymptotics of the quark helicity distribution).},
doi = {10.1007/JHEP10(2017)198},
journal = {Journal of High Energy Physics (Online)},
issn = {1029-8479},
number = 10,
volume = 2017,
place = {United States},
year = {2017},
month = {10}
}

Journal Article:
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