Publications
Publication Information
| Title | Lattice QCD constraints on the parton distribution functions of 3He |
| Authors | William Detmold, Marc Illa Subina, David Murphy, Patrick Oare, Konstantinos Orginos, Phiala Shanahan, Michael Wagman, Frank Winter |
| JLAB number | JLAB-THY-20-3248 |
| LANL number | arXiv:2009.05522 |
| Other number | DOE/OR/23177-5216; MIT-CTP/5234, ICCUB-20-019, FERMILAB-PUB-20-466-T |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Journal Compiled for Physical Review Letters Volume 126 Page(s) 202001 Refereed | |
| Publication 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 m??800 MeV, extrapolated to the physical quark masses. This constraint is consistent with, and significantly more precise than, determinations from global nuclear parton distribution function fits. Including the lattice QCD determination of the momentum fraction in the nNNPDF global fitting framework results in the uncertainty on the isovector momentum fraction ratio being reduced by a factor of 2.5, and thereby enables a more precise extraction of the u and d parton distributions in 3He. |
| Experiment Numbers: | |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevLett.126.202001 |
| Accepted Manuscript: | PhysRevLett.126.202001.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |