Abstract
We report on the status of the Novosibirsk experiment on a precision measurement of the ratio R of the elastic e +p and e -p scattering cross sections. Such measurements determine the two-photon exchange effect in elastic electron-proton scattering. The experiment is conducted at the VEPP-3 storage ring using a hydrogen internal gas target. The ratio R is measured with a beam energy of 1.6 GeV (electron/positron scattering angles are θ=55÷75° and θ=15÷25°) and 1 GeV (θ=65÷105°). We briefly describe the experimental method, paying special attention to the radiative corrections. Some preliminary results are presented.
Original language | English |
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Pages (from-to) | 216-220 |
Number of pages | 5 |
Journal | Nuclear Physics B - Proceedings Supplements |
Volume | 225-227 |
DOIs | |
Publication status | Published - 1 Apr 2012 |
Keywords
- Elastic electron-proton scattering
- Electromagnetic form factors of the proton
- Two-photon exchange
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Nuclear and High Energy Physics