Title

Measurement of the Q 2 Dependence of the Deuteron Spin Structure Function g 1 and its Moments at Low Q 2 with CLAS

Document Type

Article

Publication Date

2018

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 Γd1 and the spin polarizability γd0 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

© 2018 American Physical Society

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Publication Title

Physical Review Letters

Published Citation

Adhikari, K. P., A. Deur, L. El Fassi, H. Kang, S. E. Kuhn, M. Ripani, K. Slifer, Biselli A. et al [CLAS Collaboration]. "Measurement of the Q 2 Dependence of the Deuteron Spin Structure Function g 1 and its Moments at Low Q 2 with CLAS." Physical review letters 120, no. 6 (2018): 062501. https://doi.org/10.1103/PhysRevLett.120.062501

DOI

10.1103/PhysRevLett.120.062501

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