Measurement of the $^3$He Spin-Structure Functions and of Neutron (3He) Spin-Dependent Sum Rules at $0.035\le Q^2 \le 0.24$ GeV$^2$

Abstract : The spin-structure functions g_1 and g_2, and the spin-dependent partial cross-section \sigma_{TT} have been extracted from the polarized cross-sections differences, \Delta \sigma_{||}(\nu,Q^2) and \Delta \sigma_{\perp}(\nu,Q^2) measured for the 3He(e,e')X reaction at Jefferson Lab. Polarized electrons with energies from 1.147 to 4.404 GeV were scattered at angles of 6^o and 9^o from a longitudinally or transversely polarized 3He target. The data cover the kinematic regions of the quasi-elastic, resonance and beyond. From the extracted spin-structure functions, the first moments \Gamma_1(Q^2), \Gamma_2(Q^2) and I_{TT}(Q^2) are evaluated with high precision for the neutron in the Q^2 range from 0.035 to 0.24 GeV^2. Finally, these low Q^2 results are used to test chiral perturbation theory calculations.
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Submitted on : Tuesday, October 8, 2019 - 11:07:29 PM
Last modification on : Wednesday, October 16, 2019 - 8:54:13 AM

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V. Sulkosky, J.T. Singh, C. Peng, J.-P. Chen, A. Deur, et al.. Measurement of the $^3$He Spin-Structure Functions and of Neutron (3He) Spin-Dependent Sum Rules at $0.035\le Q^2 \le 0.24$ GeV$^2$. 2019. ⟨hal-02309031⟩

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