Lattice QCD Constraints on the Parton Distribution Functions of He 3
Name
PhysRevLett.126.202001.pdf
Description
Published version
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459.89 KB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Detmold, William
Illa, Marc
Murphy, David J
Oare, Patrick
Orginos, Kostas
Shanahan, Phiala E
Wagman, Michael L
Winter, Frank
Date Issued
2021
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Detmold, William, Illa, Marc, Murphy, David J, Oare, Patrick, Orginos, Kostas et al. 2021. "Lattice QCD Constraints on the Parton Distribution Functions of He 3." Physical Review Letters, 126 (20).
Version
Final published version
Abstract
The fraction of the longitudinal momentum of ^{3}He that is carried by the isovector combination of u and d quarks is determined using lattice QCD for the first time. The ratio of this combination to that in the constituent nucleons is found to be consistent with unity at the few-percent level from calculations with quark masses corresponding to m_{π}∼800 MeV. With a naive extrapolation to the physical quark masses, this constraint is consistent with, and more precise than, determinations from global nuclear parton distribution function fits through the nnnpdf framework. It is thus concretely demonstrated that lattice QCD calculations of light nuclei have imminent potential to enable more precise determinations of the u and d parton distributions in light nuclei and to reveal the QCD origins of the EMC effect.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PHYSREVLETT.126.202001
