Measurements of the neutron electric to magnetic form factor ratio GEn/GMn via the H2(e→,e'n→)H1 reaction to Q2=1.45 (GeV/c)2

B. Plaster, A. Yu Semenov, A. Aghalaryan, E. Crouse, G. MacLachlan, S. Tajima, W. Tireman, A. Ahmidouch, B. D. Anderson, H. Arenhövel, R. Asaturyan, O. K. Baker, A. R. Baldwin, D. Barkhuff, H. Breuer, R. Carlini, E. Christy, S. Churchwell, L. Cole, S. DanagoulianD. Day, T. Eden, M. Elaasar, R. Ent, M. Farkhondeh, H. Fenker, J. M. Finn, L. Gan, A. Gasparian, K. Garrow, P. Gueye, C. R. Howell, B. Hu, M. K. Jones, J. J. Kelly, C. Keppel, M. Khandaker, W. Y. Kim, S. Kowalski, A. Lung, D. Mack, R. Madey, D. M. Manley, P. Markowitz, J. Mitchell, H. Mkrtchyan, A. K. Opper, C. Perdrisat, V. Punjabi, B. Raue, T. Reichelt, J. Reinhold, J. Roche, Y. Sato, N. Savvinov, I. A. Semenova, W. Seo, N. Simicevic, G. Smith, S. Stepanyan, V. Tadevosyan, L. Tang, S. Taylor, P. E. Ulmer, W. Vulcan, J. W. Watson, S. Wells, F. Wesselmann, S. Wood, Chen Yan, Chenyu Yan, S. Yang, L. Yuan, W. M. Zhang, H. Zhu, X. Zhu

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Abstract

We report values for the neutron electric to magnetic form factor ratio, GEn/GMn, deduced from measurements of the neutron's recoil polarization in the quasielastic H2(e→,e'n→)H1 reaction, at three Q2 values of 0.45, 1.13, and 1.45 (GeV/c)2. The data at Q2=1.13 and 1.45 (GeV/c)2 are the first direct experimental measurements of GEn employing polarization degrees of freedom in the Q2>1 (GeV/c)2 region and stand as the most precise determinations of GEn for all values of Q2.

Original languageEnglish
Article number025205
JournalPhysical Review C - Nuclear Physics
Volume73
Issue number2
DOIs
StatePublished - 2006

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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