Physical Review C
The inclusive polarized structure functions of the proton and deuteron, gp1 and gd1 , were measured with high statistical precision using polarized 6 GeV electrons incident on a polarized ammonia target in Hall B at Jefferson Laboratory. Electrons scattered at laboratory angles between 18 and 45 degrees were detected using the CEBAF Large Acceptance Spectrometer (CLAS). For the usual deep inelastic region kinematics, Q2 > 1 GeV2 and the final-state invariant mass W >2 GeV, the ratio of polarized to unpolarized structure functions g1/F1 is found to be nearly independent of Q2 at fixed x. Significant resonant structure is apparent at values of W up to 2.3 GeV. In the framework of perturbative quantum chromodynamics, the high-W results can be used to better constrain the polarization of quarks and gluons in the nucleon, as well as high-twist contributions.
Original Publication Citation
Collaboration, C., Prok, Y., Bosted, P., Kvaltine, N., Adhikari, K. P., Adikaram, D., . . . Zonta, I. (2014). Precision measurements of g¹ of the proton and of the deuteron with 6 GeV electrons. Physical Review C, 90(2), 025212. doi:10.1103/PhysRevC.90.025212
0000-0003-1582-2376 (Dodge), 0000-0003-2243-6836 (Kuhn)
Prok, Y.; Adhikari, K. P.; Adikaram, D.; Amaryan, M. J.; Dodge, G. E.; Guler, N.; Klein, A.; Koirala, S.; Kuhn, S. E.; and CLAS Collaboration, "Precision Measurements of g¹ of the Proton and the Deuteron with 6 GeV Electrons" (2014). Physics Faculty Publications. 358.