Neutron Valence Structure from Nuclear Deep Inelastic Scattering
Abstract
Mechanisms of spin-flavor SU(6) symmetry breaking in Quantum Chromodynamics (QCD) are studied via an extraction of the free neutron structure function from a global analysis of deep inelastic scattering (DIS) data on the proton and on nuclei from $A = 2$ (deuterium) to 208 (lead). Modification of the structure function of nucleons bound in atomic nuclei (known as the EMC effect) are consistently accounted for within the framework of a universal modification of nucleons in short-range correlated (SRC) pairs. Our extracted neutron-to-proton structure function ratio $$F_2^n/F_2^p$$ becomes constant for $$x_B \ge 0.6$$, equalling $$0.47 \pm 0.04$$ as $$x_B \rightarrow 1$$, in agreement with theoretical predictions of perturbative QCD and the Dyson Schwinger equation, and in disagreement with predictions of the Scalar Diquark dominance model. Finally, we also predict $$F_2^{^3\mathrm{He}}/F_2^{^3\mathrm{H}}$$, recently measured, yet unpublished, by the MARATHON collaboration, the nuclear correction function that is needed to extract $$F_2^n/F_2^p$$ from $$F_2^{^3\mathrm{He}}/F_2^{^3\mathrm{H}}$$, and the theoretical uncertainty associated with this extraction.
- Authors:
-
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); George Washington Univ., Washington, DC (United States)
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Tel Aviv Univ., Ramat Aviv (Israel)
- Pennsylvania State Univ., University Park, PA (United States)
- Old Dominion Univ., Norfolk, VA (United States)
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1608976
- Alternate Identifier(s):
- OSTI ID: 1603743
- Report Number(s):
- JLAB-PHY-20-3176; DOE/OR/23177-4957; arXiv:1908.02223
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US2105144
- Grant/Contract Number:
- FG02-94ER40818; FG02-96ER-40960; FG02-93ER40771; AC05-06OR23177; 136/12; 1334/16
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 124; Journal Issue: 9; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Citation Formats
Segarra, Efrain P., Schmidt, Axel, Kutz, T., Higinbotham, D. W., Piasetzky, E., Strikman, M., Weinstein, L. B., and Hen, O. Neutron Valence Structure from Nuclear Deep Inelastic Scattering. United States: N. p., 2020.
Web. doi:10.1103/PhysRevLett.124.092002.
Segarra, Efrain P., Schmidt, Axel, Kutz, T., Higinbotham, D. W., Piasetzky, E., Strikman, M., Weinstein, L. B., & Hen, O. Neutron Valence Structure from Nuclear Deep Inelastic Scattering. United States. https://doi.org/10.1103/PhysRevLett.124.092002
Segarra, Efrain P., Schmidt, Axel, Kutz, T., Higinbotham, D. W., Piasetzky, E., Strikman, M., Weinstein, L. B., and Hen, O. Fri .
"Neutron Valence Structure from Nuclear Deep Inelastic Scattering". United States. https://doi.org/10.1103/PhysRevLett.124.092002. https://www.osti.gov/servlets/purl/1608976.
@article{osti_1608976,
title = {Neutron Valence Structure from Nuclear Deep Inelastic Scattering},
author = {Segarra, Efrain P. and Schmidt, Axel and Kutz, T. and Higinbotham, D. W. and Piasetzky, E. and Strikman, M. and Weinstein, L. B. and Hen, O.},
abstractNote = {Mechanisms of spin-flavor SU(6) symmetry breaking in Quantum Chromodynamics (QCD) are studied via an extraction of the free neutron structure function from a global analysis of deep inelastic scattering (DIS) data on the proton and on nuclei from $A = 2$ (deuterium) to 208 (lead). Modification of the structure function of nucleons bound in atomic nuclei (known as the EMC effect) are consistently accounted for within the framework of a universal modification of nucleons in short-range correlated (SRC) pairs. Our extracted neutron-to-proton structure function ratio $F_2^n/F_2^p$ becomes constant for $x_B \ge 0.6$, equalling $0.47 \pm 0.04$ as $x_B \rightarrow 1$, in agreement with theoretical predictions of perturbative QCD and the Dyson Schwinger equation, and in disagreement with predictions of the Scalar Diquark dominance model. Finally, we also predict $F_2^{^3\mathrm{He}}/F_2^{^3\mathrm{H}}$, recently measured, yet unpublished, by the MARATHON collaboration, the nuclear correction function that is needed to extract $F_2^n/F_2^p$ from $F_2^{^3\mathrm{He}}/F_2^{^3\mathrm{H}}$, and the theoretical uncertainty associated with this extraction.},
doi = {10.1103/PhysRevLett.124.092002},
journal = {Physical Review Letters},
number = 9,
volume = 124,
place = {United States},
year = {Fri Mar 06 00:00:00 EST 2020},
month = {Fri Mar 06 00:00:00 EST 2020}
}
Web of Science
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