Publications
Publication Information
Title | Measurement of the single-spin asymmetry Ay0 in quasi-elastic 3He(e, e'n) scattering at 0.4 < Q2 < 1.0 GeV/c2 |
Authors | Elena Long, Yawei Zhang, M. Mihovilovic, Ge Jin, Vincent Sulkosky, Aidan Kelleher, B. Anderson, Douglas Higinbotham, Simon Sirca, Kalyan Allada, John Annand, Todd Averett, William Bertozzi, Werner Boeglin, Peter Bradshaw, Alexandre Camsonne, Mustafa Canan, Gordon Cates, C. Chen, J. Chen, E. Chudakov, R. De Leo, X. Deng, A. Deur, C. Dutta, L. El Fassi, D. Flay, S. Frullani, F. Garibaldi, H. Gao, S. Gilad, R. Gilman, O. Glamazdin, S. Golge, J. Gomez, J. Hansen, T. Holmstrom, J. Huang, H. Ibrahim, C. de Jager, E. Jensen, X. Jiang, M. Jones, H. Kang, J. Katich, H. Khanal, P. King, W. Korsch, J. LeRose, R. Lindgren, H.-J. Lu, W. Luo, P. Markowitz, M. Meziane, R. Michaels, B. Moffit, P. Monaghan, N. Muangma, S. Nanda, B. Norum, K. Pan, D. Parno, E. Piasetzky, M. Posik, V. Punjabi, A. Puckett, X. Qian, Y. Qiang, X. Qui, S. Riordan, A. Saha, B. Sawatzky, M. Shabestari, A. Shahinyan, B. Shoenrock, J. John, R. Subedi, W. Tobias, W. Tireman, G. Urciuoli, D. Wang, Kaiwen Wang, Y. Wang, J. Watson, Bogdan Wojtsekhowski, Z. Ye, X. Zhan, Y.-W. Zhang, X. Zheng, B. Zhao, L. Zhu |
JLAB number | JLAB-PHY-19-2949 |
LANL number | arXiv:1906.04075 |
Other number | DOE/OR/23177-4693 |
Document Type(s) | (Journal Article) |
Associated with EIC: | No |
Supported by Jefferson Lab LDRD Funding: | No |
Funding Source: | Nuclear Physics (NP) |
Journal Compiled for Physics Letters B Volume 797 Page(s) 134875 Refereed | |
Publication Abstract: | Due to the lack of free neutron targets, studies of the structure of the neutron are typically made by scattering electrons from either 2H or 3He targets. In order to extract useful neutron information from a 3He target, one must understand how the neutron in a 3He system differs from a free neutron by taking into account nuclear effects such as final state interactions and meson exchange currents. The target single spin asymmetry Ay0 is an ideal probe of such effects, as any deviation from zero indicates effects beyond plane wave impulse approximation. New measurements of the target single spin asymmetry Ay0 at Q2 of 0.46 and 0.96 (GeV/c)^2 were made at Jefferson Lab using the quasi-elastic transversely polarized 3He(e,e'n) reaction. Our measured asymmetry decreases rapidly, from >20% at Q2 = 0.46(GeV/c)^2 to nearly zero at Q^2=0.96(GeV$/c)^2, demonstrating the fall-off of the reaction mechanism effects as Q^2 increases. We also observed a small epsilon-dependent increase in Ay0 compared to previous measurements, particularly at moderate Q2. This indicates that upcoming high Q^2 measurements from the Jefferson Lab 12~GeV program can cleanly probe neutron structure from polarized 3He using plane wave impulse approximation. |
Experiment Numbers: | E08-005 |
Group: | Hall A |
Document: | |
DOI: | https://doi.org/10.1016/j.physletb.2019.134875 |
Accepted Manuscript: | 1-s2.0-S0370269319305891-main.pdf |
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