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Title Deep inelastic scattering from A = 3 nuclei: Nucleon structure and the EMC effect
Authors Tyler Kutz
JLAB number JLAB-PHY-19-3119
LANL number (None)
Other number DOE/OR/23177-4858
Document Type(s) (Thesis) 
Supported by U.S. Naval Research: No
Supported by Jefferson Lab LDRD Funding: No
Funding Source: Nuclear Physics (NP)
A PHD thesis
Advisor(s) :
   Krishna Kumar (Stony Brook)
Publication Abstract: The MARATHON experiment ran at Jefferson Laboratory in 2018, measuring deep inelastic scattering of 10.6 GeV electrons from the proton (p), deuterium (D), tritium (3H), and helium-3 (3He). MARATHON's experimental observables are cross section ratios, most notably 3H/3He. This ratio of mirror nuclei is used for a novel extraction of the nucleon structure function ratio Fn 2 /Fp 2 with minimal nuclear corrections. Determining leading-order Fn 2 /Fp 2 at high x provides important constrains on the ratio of nucleon valence quark distributions d/u. The ratios 3H/D and 3He/D allow a determination of the EMC effect in the lightest nuclei sensitive to possible isospin dependence of nuclear effects. Lastly, the D/p ratio allows a comparison of the MARATHON experiment to SLAC measurements, and provides data to which the A = 3 ratios can be renormalized. The MARATHON results provide new constraints on d/u. Additionally, the results emphasize the importance of higher-order effects in extracting Fn 2 /Fp 2 from DIS measurements, and can help constrain said effects. In the renormalization scheme applied in the MARATHON analysis, no significant isospin dependence of the EMC effect is observed.
Experiment Numbers:
Group: Hall A
Document: pdf
Accepted Manuscript:
Supporting Documents:
Supporting Datasets: