arXiv · 1908.05709
Measurement of the 3He Spin-Structure Functions and of Neutron (3He) Spin-Dependent Sum Rules at 0.035<Q^2<0.24 GeV^2
Abstract
The spin-structure functions $g_1$ and $g_2$, and the spin-dependent partial cross-section $\sigma_\mathrm{TT}$ have been extracted from the polarized cross-sections differences, $\Delta \sigma_{\parallel}\hspace{-0.06cm}\left(\nu,Q^{2}\right)$ and $\Delta \sigma_{\perp}\hspace{-0.06cm}\left(\nu,Q^{2}\right)$ measured for the $\vec{^\textrm{3}\textrm{He}}(\vec{\textrm{e}},\textrm{e}')\textrm{X}$ reaction, in the E97-110 experiment at Jefferson Lab. Polarized electrons with energies from 1.147 to 4.404 GeV were scattered at angles of 6$^{\circ}$ and 9$^{\circ}$ from a longitudinally or transversely polarized $^{3}$He target. The data cover the kinematic regions of the quasi-elastic, resonance production and beyond. From the extracted spin-structure functions, the first moments $\overline{\Gamma_1}\hspace{-0.06cm}\left(Q^{2}\right)$, $\Gamma_2\hspace{-0.06cm}\left(Q^{2}\right)$ and $I_{\mathrm{TT}}\hspace{-0.06cm}\left(Q^{2}\right)$ are evaluated with high precision for the neutron in the $Q^2$ range from 0.035 to 0.24~GeV$^{2}$. The comparison of the data and the chiral effective field theory predictions reveals the importance of proper treatment of the $\Delta$ degree of freedom for spin observables.
Explore related subjects
Keep this discovery
V. Sulkosky, J. T. Singh, C. Peng, J. -P. Chen, A. Deur, S. Abrahamyan, K. A. Aniol, D. S. Armstrong, T. Averett, S. L. Bailey, A. Beck, P. Bertin, F. Butaru, W. Boeglin, A. Camsonne, G. D. Cates, C. C. Chang, Seonho Choi, E. Chudakov, L. Coman, J. C Cornejo, B. Craver, F. Cusanno, R. De Leo, C. W. de Jager, J. D. Denton, S. Dhamija, R. Feuerbach, J. M. Finn, S. Frullani, K. Fuoti, H. Gao, F. Garibaldi, O. Gayou, R. Gilman, A. Glamazdin, C. Glashausser, J. Gomez, J. -O. Hansen, D. Hayes, B. Hersman, D. W. Higinbotham, T. Holmstrom, T. B. Humensky, C. E. Hyde, H. Ibrahim, M. Iodice, X. Jiang, L. J. Kaufman, A. Kelleher, K. E. Keister, W. Kim, A. Kolarkar, N. Kolb, W. Korsch, K. Kramer, G. Kumbartzki, L. Lagamba, V. Laine, G. Laveissiere, J. J. Lerose, D. Lhuillier, R. Lindgren, N. Liyanage, H. -J. Lu, B. Ma, D. J. Margaziotis, P. Markowitz, K. McCormick, M. Meziane, Z. -E. Meziani, R. Michaels, B. Moffit, P. Monaghan, S. Nanda, J. Niedziela, M. Niskin, R. Pandolfi, K. D. Paschke, M. Potokar, A. Puckett, V. A. Punjabi, Y. Qiang, R. Ransome, B. Reitz, R. Roche, A. Saha, A. Shabetai, S. Sirca, K. Slifer, R. Snyder, P. Solvignon, R. Stringer, R. Subedi, W. A. Tobias, N. Ton, P. E. Ulmer, G. M. Urciuoli, A. Vacheret, E. Voutier. 2019-08-15. Measurement of the 3He Spin-Structure Functions and of Neutron (3He) Spin-Dependent Sum Rules at 0.035<Q^2<0.24 GeV^2. https://doi.org/10.1016/j.physletb.2020.135428
Cite the original work for its findings. Save a collection to share your selection of sources.