Measurement of the Q² Dependence of the Deuteron Spin Structure Function g1 and its Moments at Low Q² with CLAS

Authors

CLAS Collaboration
K. P. Adhikari, Old Dominion University
L. El Fassi, Old Dominion University
S E. KuhnFollow
M. J. Amaryan, Old Dominion UniversityFollow
S. Bültmann, Old Dominion UniversityFollow
G. Charles, Old Dominion University
Gail Dodge, Old Dominion UniversityFollow
N. Guler, Old Dominion University
C. E. Hyde, Old Dominion UniversityFollow
A. Klein, Old Dominion UniversityFollow
D. Payette, Old Dominion University
J. Poudel, Old Dominion University
Y. Prok, Old Dominion UniversityFollow
L. B. Weinstein, Old Dominion UniversityFollow
J. Zhang, Old Dominion University
Z. W. Zhao, Old Dominion University

Document Type

Article

Publication Date

2018

DOI

10.1103/PhysRevLett.120.062501

Publication Title

Physical Review Letters

Volume

120

Issue

6

Pages

062501 (7 pages)

Abstract

We measured the g₁ spin structure function of the deuteron at low Q², where QCD can be approximated with chiral perturbation theory (χPT). The data cover the resonance region, up to an invariant mass of W ≈ 1.9  GeV. The generalized Gerasimov-Drell-Hearn sum, the moment Γ^d₁ and the spin polarizability γ^d₀ are precisely determined down to a minimum Q² of 0.02  GeV² for the first time, about 2.5 times lower than that of previous data. We compare them to several χPT calculations and models. These results are the first in a program of benchmark measurements of polarization observables in the χPT domain.

Comments

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© American Physical Society

Original Publication Citation

Collaboration, C., Adhikari, K. P., Deur, A., El Fassi, L., Kang, H., Kuhn, S. E., . . . Zhao, Z. W. (2018). Measurement of the q² dependence of the deuteron spin structure function g1 and its moments at low Q² with CLAS. Physical Review Letters, 120(6), 062501. doi:10.1103/PhysRevLett.120.062501

ORCID

0000-0003-2243-6836 (Kuhn), 0000-0003-1582-2376 (Dodge), 0000-0001-7282-8120 (Hyde), 0000-0001-5416-2900 (Weinstein)

Repository Citation

CLAS Collaboration; Adhikari, K. P.; El Fassi, L.; Kuhn, S E.; Amaryan, M. J.; Bültmann, S.; Charles, G.; Dodge, Gail; Guler, N.; Hyde, C. E.; Klein, A.; Payette, D.; Poudel, J.; Prok, Y.; Weinstein, L. B.; Zhang, J.; and Zhao, Z. W., "Measurement of the Q² Dependence of the Deuteron Spin Structure Function g1 and its Moments at Low Q² with CLAS" (2018). Physics Faculty Publications. 232.
https://digitalcommons.odu.edu/physics_fac_pubs/232