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Measurement of the Neutron F-2 Structure Function via Spectator Tagging with CLAS

Baillie, N.
; 
Christy, M. E.
; 
Keppel, C. E.
; 
Bosted, P.
; 
Griffioen, K. A.
; 
Jawalkar, S. S.
; 
Zhao, B.
Abstract
We report on the first measurement of the F-2 structure function of the neutron from the semi-inclusive scattering of electrons from deuterium, with low-momentum protons detected in the backward hemisphere. Restricting the momentum of the spectator protons to less than or similar to 100 MeV/c and their angles to greater than or similar to 100 degrees relative to the momentum transfer allows an interpretation of the process in terms of scattering from nearly on-shell neutrons. The F-2(n) data collected cover the nucleon-resonance and deep-inelastic regions over a wide range of Bjorken x for 0.65 < Q(2) < 4.52 GeV2, with uncertainties from nuclear corrections estimated to be less than a few percent. These measurements provide the first determination of the neutron to proton structure function ratio F-2(n)/F-2(p) at 0.2 less than or similar to x less than or similar to 0.8 with little uncertainty due to nuclear effects.
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2012-01-01
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Physics
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Physics
DOI
https://doi.org/10.1103/PhysRevLett.108.142001
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https://scholarworks.wm.edu/handle/internal/721
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