Document Type

Article

Publication Date

2022

DOI

10.1103/PhysRevLett.128.132003

Publication Title

Physical Review Letters

Volume

128

Issue

13

Pages

132003 (1-8)

Abstract

The ratio of the nucleon F2 structure functions, Fn2/Fp2, is determined by the MARATHON experiment from measurements of deep inelastic scattering of electrons from 3H and 3He nuclei. The experiment was performed in the Hall A Facility of Jefferson Lab using two high-resolution spectrometers for electron detection, and a cryogenic target system which included a low-activity tritium cell. The data analysis used a novel technique exploiting the mirror symmetry of the two nuclei, which essentially eliminates many theoretical uncertainties in the extraction of the ratio. The results, which cover the Bjorken scaling variable range 0.19 < x < 0.83, represent a significant improvement compared to previous SLAC and Jefferson Lab measurements for the ratio. They are compared to recent theoretical calculations and empirical determinations of the Fn2/Fp2 ratio.

Comments

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Original Publication Citation

Abrams, D., Albataineh, H., Aljawrneh, B.S., Alsalmi, S., Androic, D., Aniol, K., Armstrong, W., Arrington, J., Atac, H., Averett, T., Ayerbe Gayoso, C., Bai, X., Bane, J., Barcus, S., Beck, A., Bellini, V., Bhatt, H., Bhetuwal, D., Biswas, D., . . . Zhang, J. (2022). Measurement of the nucleon Fn2/Fp2 structure function ratio by the Jefferson Lab MARATHON tritium/helium-3 deep inelastic scattering experiment. Physical Review Letters 128(13), 1-8, Article 132003. https://doi.org/10.1103/PhysRevLett.128.132003

ORCID

0000-0002-4136-2572 (Bulumulla), 0000-0001-7282-8120 (Hyde)

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