Extraction of the neutron F 2 structure function from inclusive proton and deuteron deep-inelastic scattering data

Li, S.; Accardi, A.; Cerutti, M.; Fernando, I. P.; Keppel, C. E.; Melnitchouk, W.; Monaghan, P.; Niculescu, G.; Niculescu, M. I.; Owens, J. F.

doi:10.1103/PhysRevD.109.074036

Title: Extraction of the neutron $F_{2}$ structure function from inclusive proton and deuteron deep-inelastic scattering data

Journal Article · 29 April 2024 · Physical Review. D.

DOI: https://doi.org/10.1103/PhysRevD.109.074036 · OSTI ID:2342163

;

; Cerutti, M.;

; Keppel, C. E.;

; Monaghan, P.;

;

The available world deep-inelastic scattering (DIS) data on proton and deuteron structure functions $F_{2}^{p}$ , $F_{2}^{d}$ , and their ratios are leveraged to extract the free neutron $F_{2}^{n}$ structure function, the $F_{2}^{n} / F_{2}^{p}$ ratio, and associated uncertainties using the latest nuclear effect calculations in the deuteron. Special attention is devoted to the normalization of the proton and deuteron experimental datasets and to the treatment of correlated systematic errors, as well as the quantification of procedural and theoretical uncertainties. The extracted $F_{2}^{n}$ dataset is utilized to evaluate the $Q^{2}$ dependence of the Gottfried sum rule and the nonsinglet $F_{2}^{p} - F_{2}^{n}$ moments. To facilitate replication of our study, as well as for general applications, we provide a comprehensive DIS database including all recent Jefferson Lab 6 GeV measurements, the extracted $F_{n}^{2}$ , a modified CTEQ-JLab global parton distribution function fit named CJ15nlo_mod, and grids with calculated proton, neutron, and deuteron DIS structure functions. Published by the American Physical Society 2024

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

Sponsoring Organization:: Australian Research Council; National Science Foundation (NSF); USDOE; University of Adelaide

Grant/Contract Number:: AC02-05CH11231; AC05-06OR23177; FG02-88ER40410; SC0008791

OSTI ID:: 2342163

Report Number(s):: DOE/OR/23177-7103; JLAB-THY-23-3907; 074036

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 7 Vol. 109; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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