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1. Extraction of the Neutron Magnetic Form Factor from Quasi-Elastic 3He(pol)(e(pol),e') at Q^2 = 0.1 - 0.6 (GeV/c)^2

Author

Collaboration, Jefferson Lab E95-001

Subjects
Nuclear Experiment
Abstract

We have measured the spin-dependent transverse asymmetry, A_T', in quasi-elastic inclusive electron scattering from polarized 3He with high precision at Q^2 = 0.1 to 0.6 (GeV/c)^2. The neutron magnetic form factor, GMn, was extracted at Q^2 = 0.1 and 0.2 (GeV/c)^2 using a non-relativistic Faddeev calculation that includes both final-state interactions (FSI) and meson-exchange currents (MEC). In addition, GMn was extracted at Q^2 = 0.3 to 0.6 (GeV/c)^2 using a Plane Wave Impulse Approximation calculation. The accuracy of the modeling of FSI and MEC effects was tested and confirmed with a precision measurement of the spin-dependent asymmetry in the breakup threshold region of the 3He(pol)(e(pol),e') reaction. The total relative uncertainty of the extracted GMn data is approximately 3%. Close agreement was found with other recent high-precision GMn data in this Q^2 range., Comment: Archival paper, 17 pages, 10 figures, 5 tables, submitted to Physical Review C. v2: shortened considerably, updated comparison to theory

Published
2006
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2. Extraction of the Neutron Magnetic Form Factor from Quasi-Elastic 3He(pol)(e(pol),e') at Q^2 = 0.1 - 0.6 (GeV/c)^2

Author

Anderson, B., Auberbach, L., Averett, T., Bertozzi, W., Black, T., Calarco, J., Cardman, L., Cates, G.D., Chai, Z.W., Chen, J.P., Choi, Seonho, Chudakov, E., Churchwell, S., Corrado, G.S., Crawford, C., Dale, D., Deur, A., Djawotho, P., Dutta, D., Finn, J.M., Gao, H., Gilman, R., Glamazdin, A.V., Glashausser, C., Glockle, W., Golak, J., Gomez, J., Gorbenko, V.G., Hansen, J.O., Hersman, F.W., Higinbotham, D.W., Holmes, R., Howell, C.R., Hughes, E., Humensky, B., Incerti, S., De Jager, C.W., Jensen, J.S., Jiang, X., Jones, C.E., Jones, M., Kahl, R., Kamada, H., Kievsky, A., Kominis, I., Korsch, W., Kramer, K., Kumbartzki, G., Kuss, M., Lakuriqi, E., Liang, M., Liyanage, N., LeRose, J., Malov, S., Margaziotis, D.J., Martin, J.W., McCormick, K., McKeown, R.D., McIlhany, K., Meziani, Z.E., Michaels, R., Miller, G.W., Mitchell, J., Nanda, S., Pace, E., Pavlin, T., Petratos, G.G., Pomatsalyuk, R.I., Pripstein, D., Prout, D., Ransome, R.D., Roblin, Y., Rvachev, M., Saha, A., Salmè, G., Schnee, M., Seely, J., Shin, T., Slifer, K., Souder, P.A., Strauch, S., Suleiman, R., Sutter, M., Tipton, B., Todor, L., Viviani, M., Vlahovic, B., Watson, J., Williamson, C.F., Witala, H., Wojtsekhowski, B., Xiong, F., Xu, Wei-Jiang, Yeh, J., Zolnierczuk, P., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Jefferson Lab E95-001, and Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
13.40.Gp, 14.20.Dh, 24.70. +s, 25.10. +s, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

We have measured the spin-dependent transverse asymmetry, A_T', in quasi-elastic inclusive electron scattering from polarized 3He with high precision at Q^2 = 0.1 to 0.6 (GeV/c)^2. The neutron magnetic form factor, GMn, was extracted at Q^2 = 0.1 and 0.2 (GeV/c)^2 using a non-relativistic Faddeev calculation that includes both final-state interactions (FSI) and meson-exchange currents (MEC). In addition, GMn was extracted at Q^2 = 0.3 to 0.6 (GeV/c)^2 using a Plane Wave Impulse Approximation calculation. The accuracy of the modeling of FSI and MEC effects was tested and confirmed with a precision measurement of the spin-dependent asymmetry in the breakup threshold region of the 3He(pol)(e(pol),e') reaction. The total relative uncertainty of the extracted GMn data is approximately 3%. Close agreement was found with other recent high-precision GMn data in this Q^2 range., Comment: Archival paper, 17 pages, 10 figures, 5 tables, submitted to Physical Review C. v2: shortened considerably, updated comparison to theory

Published
2006
Full Text
View/download PDF

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