The ratio of proton electromagnetic form factors via recoil polarimetry at Q2 = 1.13 (GeV/c)2

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

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


Recoil polarimetry was used to extract the ratio of the proton electromagnetic form factors, μp GEp/ GMp = 0.878 ± 0.064(stat) ± 0.012(sys), at Q2 = 1.13 (GeV/c)2 from the reaction 1H(e, ep). This was an ancillary measurement in which the proton polarization was determined as part of a larger program utilizing a stand-alone polarimeter designed to measure μn GEn/GMn. This measurement complements previous recoil polarimetry measurements of μp GEp/GMp made at the Thomas Jefferson National Accelerator Facility.

Original languageEnglish
Pages (from-to)261-273
Number of pages13
JournalNuclear Physics A
Issue number1-4
StatePublished - Jan 9 2006

Bibliographical note

Funding Information:
This work was supported in part by the National Science Foundation and the US Department of Energy. The Southeastern Universities Research Association (SURA) operates the Thomas Jefferson National Accelerator Facility under contract from the US Department of Energy.


  • Measured recoil proton spectra Polarization. H deduced ratio of electromagnetic from factros
  • Nuclear reactions H(polarized e, e′ p), E=2329 MeV

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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