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

Sulkosky V.,Singh J. T.,Peng C.,Chen J. -P.,Deur A.,Abrahamyan S.,Aniol K. A.,Armstrong D. S.,Averett T.,Bailey S. L.,Beck A.,Bertin P.,Butaru F.,Boeglin W.,Camsonne A.,Cates G. D.,Chang C. C.,Choi Seonho,Chudakov E.,Coman L.,Cornejo J. C,Craver B.,Cusanno F.,De Leo R.,de Jager C. W.,Denton J. D.,Dhamija S.,Feuerbach R.,Finn J. M.,Frullani S.,Fuoti K.,Gao H.,Garibaldi F.,Gayou O.,Gilman R.,Glamazdin A.,Glashausser C.,Gomez J.,Hansen J. -O.,Hayes D.,Hersman B.,Higinbotham D. W.,Holmstrom T.,Humensky T. B.,Hyde C. E.,Ibrahim H.,Iodice M.,Jiang X.,Kaufman L. J.,Kelleher A.,Keister K. E.,Kim W.,Kolarkar A.,Kolb N.,Korsch W.,Kramer K.,Kumbartzki G.,Lagamba L.,Laine V.,Laveissiere G.,Lerose J. J.,Lhuillier D.,Lindgren R.,Liyanage N.,Lu H. -J.,Ma B.,Margaziotis D. J.,Markowitz P.,McCormick K.,Meziane M.,Meziani Z. -E.,Michaels R.,Moffit B.,Monaghan P.,Nanda S.,Niedziela J.,Niskin M.,Pandolfi R.,Paschke K. D.,Potokar M.,Puckett A.,Punjabi V. A.,Qiang Y.,Ransome R.,Reitz B.,Roche R.,Saha A.,Shabetai A.,Sirca S.,Slifer K.,Snyder R.,Solvignon P.,Stringer R.,Subedi R.,Tobias W. A.,Ton N.,Ulmer P. E.,Urciuoli G. M.,Vacheret A.,Voutier E.,Wang K.,Wan L.,Wojtsekhowski B.,Woo S.,Yao H.,Yuan J.,Zhan X.,Zheng X.,Zhu L.

arxiv（2019）

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摘要

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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