-Measurement of the proton's electric to magnetic form factor ratio from 1H(over -->)(e(over -->),e'p)

C B Crawford; A Sindile; T Akdogan; R Alarcon; W Bertozzi; E Booth; T Botto; J Calarco; B Clasie; A Degrush; T W Donnelly; K Dow; D Dutta; M Farkhondeh; R Fatemi; O Filoti; W Franklin; H Gao; E Geis; S Gilad; W Haeberli; D Hasell; W Hersman; M Holtrop; P Karpius; M Kohl; H Kolster; T Lee; A Maschinot; J Matthews; K McIlhany; N Meitanis; R G Milner; R P Redwine; J Seely; A Shinozaki; S Sirca; E Six; T Smith; B Tonguc; C Tschalaer; E Tsentalovich; W Turchinetz; J F J van den Brand; J van der Laan; F Wang; T Wise; Y Xiao; W Xu; C Zhang; Z Zhou; V Ziskin; T Zwart

doi:10.1103/PhysRevLett.98.052301

-Measurement of the proton's electric to magnetic form factor ratio from 1H(over -->)(e(over -->),e'p)

Phys Rev Lett. 2007 Feb 2;98(5):052301. doi: 10.1103/PhysRevLett.98.052301. Epub 2007 Jan 30.

Affiliation

¹ Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

PMID: 17358849
DOI: 10.1103/PhysRevLett.98.052301

Abstract

We report the first precision measurement of the proton electric to magnetic form factor ratio from spin-dependent elastic scattering of longitudinally polarized electrons from a polarized hydrogen internal gas target. The measurement was performed at the MIT-Bates South Hall Ring over a range of four-momentum transfer squared Q2 from 0.15 to 0.65 (GeV/c)(2). Significantly improved results on the proton electric and magnetic form factors are obtained in combination with existing cross-section data on elastic electron-proton scattering in the same Q2 region.