Document Type

Article

Publication Date

2014

DOI

10.1103/PhysRevC.90.025212

Publication Title

Physical Review C

Volume

90

Issue

2

Pages

025212 (1-18)

Abstract

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.

Comments

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© 2014 The American Physical Society

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

ORCID

0000-0003-1582-2376 (Dodge), 0000-0003-2243-6836 (Kuhn)

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