Physical Review C
We report on the first measurement of the F2 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 ≲ 100 MeV/c and their angles to ≳ 100° relative to the momentum transfer allows an interpretation of the process in terms of scattering from nearly on-shell neutrons. The Fn2 data collected cover the nucleon-resonance and deep-inelastic regions over a wide range of Bjorken x for 0.65 < Q2 2, 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 Fn2 / Fp2 at 0.2 ≲ x ≲0.8 with little uncertainty due to nuclear effects.
Original Publication Citation
Collaboration, C., Park, K., Gothe, R. W., Adhikari, K. P., Adikaram, D., Anghinolfi, M., . . . Zhao, Z. W. (2012). Measurement of the generalized form factors near threshold via ˠ*p→nπ+ at high Q². Physical Review C, 85(3), 035208. doi:10.1103/PhysRevC.85.035208
0000-0001-7282-8120 (Hyde), 0000-0003-2243-6836 (Kuhn)
CLAS Collaboration; Park, K.; Gothe, R. W.; Adhikari, K. P.; Adikaram, D.; Bennett, R. P.; Hyde, C. E.; Klein, A.; Kuhn, S. E.; and Seraydaryan, H., "Measurement of the Generalized Form Factors Near Threshold Via ˠ*p→nπ+ at High Q²" (2012). Physics Faculty Publications. 367.