Accessing gluon polarization with high- hadrons in SIDIS

No Thumbnail Available
Authors
Whitehill, R.M.
Zhou, Yiyu
Sato, N.
Melnitchouk, W.
Advisors
Issue Date
2023-02-27
Type
Article
Keywords
Gluon , Deep inelastic scattering , Perturbative QCD
Research Projects
Organizational Units
Journal Issue
Citation
R.M. Whitehill, Yiyu Zhou, N. Sato, and W. Melnitchouk (Jefferson Lab Angular Momentum (JAM) Collaboration) Phys. Rev. D 107, 034033 – Published 27 February 2023
Abstract

A recent global QCD analysis of jet production and other polarized scattering data has found the presence of negative solutions for the gluon helicity distribution in the proton, Δg, along with the traditional Δg > 0 solutions. We consider polarized semi-inclusive deep-inelastic scattering for hadrons produced with large transverse momentum as a means of constraining the dependence of Δg on the parton momentum fraction, x. Focusing on the double longitudinal spin asymmetry, we identify the kinematics relevant for future experiments at Jefferson Lab and the Electron-Ion Collider that are particularly sensitive to the polarized gluon channel and could discriminate between the different Δg behaviors. We find that a ∼20 GeV beam at the high luminosity Jefferson Lab may be especially well-suited for discriminating between the positive and negative solutions.

Table of Contents
Description
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
Publisher
American Physical Society
Journal
Book Title
Series
Physical Review D
Volume 107, No. 3
PubMed ID
DOI
ISSN
2470-0029
EISSN