New Data-Driven Constraints on the Sign of Gluon Polarization in the Proton
Recently, the possible existence of negative gluon helicity Δg has been observed to be compatible with existing empirical constraints, including from jet production in polarized proton-proton collisions at the Relativistic Heavy Ion Collider, and lattice QCD data on polarized gluon Ioffe time distributions. We perform a new global analysis of polarized parton distributions in the proton with new constraints from the high-x region of deep-inelastic scattering (DIS). A dramatic reduction in the quality of the fit for the negative Δg replicas compared to those with positive Δg suggests that the negative Δg solution cannot simultaneously account for high-x polarized DIS data along with lattice and polarized jet data.
Authors
- N. Sato (ORCID: https://orcid.org/0000-0002-1535-6208)
- M. J. White
- Christopher Cocuzza (ORCID: https://orcid.org/0000-0003-4922-9247)
- A. W. Thomas (ORCID: https://orcid.org/0000-0003-0026-499X)
- N. T. Hunt-Smith (ORCID: https://orcid.org/0000-0003-0932-870X)
- Wally Melnitchouk (ORCID: https://orcid.org/0000-0002-9521-5973)
Institutions
- William & Mary (US)
- Williams (United States) (US)
- Thomas Jefferson National Accelerator Facility (US)
- ARC Centre of Excellence for Dark Matter Particle Physics (AU)
- The University of Adelaide (AU)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2024-10-16
- DOI
- https://doi.org/10.1103/physrevlett.133.161901
- Citations
- 9
- Primary Topic
- Particle physics theoretical and experimental studies
- Type
- article
- Field-Weighted Citation Impact
- 5.94
Funders
- U.S. Department of Energy
- University of Adelaide
- Office of Science
- Nuclear Physics
- Thomas Jefferson National Accelerator Facility