Phys. Rev. Lett. 91, 142304 (2003) [4 pages]Two-Photon Exchange and Elastic Electron-Proton Scattering
P. G. Blunden1,2, W. Melnitchouk2, and J. A. Tjon2,3 Received 25 June 2003; published 3 October 2003 Two-photon exchange contributions to elastic electron-proton scattering cross sections are evaluated in a simple hadronic model including the finite size of the proton. The corrections are found to be small in magnitude, but with a strong angular dependence at fixed Q2. This is significant for the Rosenbluth technique for determining the ratio of the electric and magnetic form factors of the proton at high Q2, and partly reconciles the apparent discrepancy with the results of the polarization transfer technique. ©2003 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevLett.91.142304 [ Abstract | Previous article | Next article | Issue 14 ] |
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