Measurements of the electric form factor of the neutron up to Q 2=3.4 GeV2 using the reaction 3He→(e→,e′n) pp

S. Riordan, S. Abrahamyan, B. Craver, A. Kelleher, A. Kolarkar, J. Miller, G. D. Cates, N. Liyanage, B. Wojtsekhowski, A. Acha, K. Allada, B. Anderson, K. A. Aniol, J. R.M. Annand, J. Arrington, T. Averett, A. Beck, M. Bellis, W. Boeglin, H. BreuerJ. R. Calarco, A. Camsonne, J. P. Chen, E. Chudakov, L. Coman, B. Crowe, F. Cusanno, D. Day, P. Degtyarenko, P. A.M. Dolph, C. Dutta, C. Ferdi, C. Fernández-Ramírez, R. Feuerbach, L. M. Fraile, G. Franklin, S. Frullani, S. Fuchs, F. Garibaldi, N. Gevorgyan, R. Gilman, A. Glamazdin, J. Gomez, K. Grimm, J. O. Hansen, J. L. Herraiz, D. W. Higinbotham, R. Holmes, T. Holmstrom, D. Howell, C. W. De Jager, X. Jiang, M. K. Jones, J. Katich, L. J. Kaufman, M. Khandaker, J. J. Kelly, D. Kiselev, W. Korsch, J. Lerose, R. Lindgren, P. Markowitz, D. J. Margaziotis, S. May Tal Beck, S. Mayilyan, K. McCormick, Z. E. Meziani, R. Michaels, B. Moffit, S. Nanda, V. Nelyubin, T. Ngo, D. M. Nikolenko, B. Norum, L. Pentchev, C. F. Perdrisat, E. Piasetzky, R. Pomatsalyuk, D. Protopopescu, A. J.R. Puckett, V. A. Punjabi, X. Qian, Y. Qiang, B. Quinn, I. Rachek, R. D. Ransome, P. E. Reimer, B. Reitz, J. Roche, G. Ron, O. Rondon, G. Rosner, A. Saha, M. M. Sargsian, B. Sawatzky, J. Segal, M. Shabestari, A. Shahinyan, Yu Shestakov, J. Singh, S. Širca, P. Souder, S. Stepanyan, V. Stibunov, V. Sulkosky, S. Tajima, W. A. Tobias, J. M. Udias, G. M. Urciuoli, B. Vlahovic, H. Voskanyan, K. Wang, F. R. Wesselmann, J. R. Vignote, S. A. Wood, J. Wright, H. Yao, X. Zhu

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Abstract

The electric form factor of the neutron was determined from studies of the reaction 3He→(e→,e′n)pp in quasielastic kinematics in Hall A at Jefferson Lab. Longitudinally polarized electrons were scattered off a polarized target in which the nuclear polarization was oriented perpendicular to the momentum transfer. The scattered electrons were detected in a magnetic spectrometer in coincidence with neutrons that were registered in a large-solid-angle detector. More than doubling the Q2 range over which it is known, we find GEn=0.0236±0.0017(stat)±0.0026(syst), 0.0208±0.0024±0.0019, and 0.0147±0.0020±0.0014 for Q2=1.72, 2.48, and 3.41GeV2, respectively.

Original languageEnglish (US)
Article number262302
JournalPhysical Review Letters
Volume105
Issue number26
DOIs
StatePublished - Dec 30 2010

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Riordan, S., Abrahamyan, S., Craver, B., Kelleher, A., Kolarkar, A., Miller, J., Cates, G. D., Liyanage, N., Wojtsekhowski, B., Acha, A., Allada, K., Anderson, B., Aniol, K. A., Annand, J. R. M., Arrington, J., Averett, T., Beck, A., Bellis, M., Boeglin, W., ... Zhu, X. (2010). Measurements of the electric form factor of the neutron up to Q 2=3.4 GeV2 using the reaction 3He→(e→,e′n) pp. Physical Review Letters, 105(26), [262302]. https://doi.org/10.1103/PhysRevLett.105.262302