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http://hdl.handle.net/2445/177361
Title: | Lattice QCD constraints on the parton distribution functions of ³He |
Author: | Detmold, William Illa, Marc Murphy, D. J. Oare Patrick Orginos, Kostas Shanahan, P.E. Wagman, Michael Winter, Frank |
Keywords: | Quarks Cromodinàmica quàntica Física nuclear Quarks Quantum chromodynamics Nuclear physics |
Issue Date: | 17-May-2021 |
Publisher: | American Physical Society |
Abstract: | The fraction of the longitudinal momentum of 3He 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 mπ ∼ 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. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.126.202001 |
It is part of: | Physical Review Letters, 2021, vol. 126, num. 20, p. 202001 |
URI: | http://hdl.handle.net/2445/177361 |
Related resource: | https://doi.org/10.1103/PhysRevLett.126.202001 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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