Phys. Rev. Lett. 88, 092301 (2002) [5 pages]Measurement of GEp/GMp in e→p → ep→ to Q2 = 5.6 GeV2 |
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This Week's Milestone Letters are from 1973: |
Received 15 November 2001; published 12 February 2002
The ratio of the electric and magnetic form factors of the proton GEp/GMp, which is an image of its charge and magnetization distributions, was measured at the Thomas Jefferson National Accelerator Facility (JLab) using the recoil polarization technique. The ratio of the form factors is directly proportional to the ratio of the transverse to longitudinal components of the polarization of the recoil proton in the elastic e→p→ep→ reaction. The new data presented span the range 3.5<Q2<5.6 GeV2 and are well described by a linear Q2 fit. Also, the ratio sqrt[Q2] F2p/F1p reaches a constant value above Q2 = 2 GeV2.
©2002 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v88/e092301
DOI: 10.1103/PhysRevLett.88.092301
PACS: 25.30.Bf, 13.40.Gp, 14.20.Dh, 24.85.+p
* Currently at Thomas Jefferson National Accelerator Facility, Newport News, VA 23606.
† On leave of absence from Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria.
‡ Currently at George Washington University, Washington, D.C. 20052.
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