Measurement of the two-photon exchange contribution in elastic ep scattering at VEPP-3

A. V. Gramolin, J. Arrington, L. M. Barkov, V. F. Dmitriev, V. V. Gauzshtein, R. A. Golovin, R. J. Holt, V. V. Kaminsky, B. A. Lazarenko, S. I. Mishnev, N. Yu Muchnoi, V. V. Neufeld, D. M. Nikolenko, I. A. Rachek, R. Sh Sadykov, Yu V. Shestakov, V. N. Stibunov, D. K. Toporkov, H. de Vries, S. A. Zevakov & 1 others V. N. Zhilich

Research output: Contribution to journalArticle

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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 languageEnglish
Pages (from-to)216-220
Number of pages5
JournalNuclear Physics B - Proceedings Supplements
Volume225-227
DOIs
Publication statusPublished - 1 Apr 2012

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elastic scattering
photons
proton scattering
scattering cross sections
positrons
electron scattering
hydrogen
scattering
gases
electrons
energy

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

Cite this

Measurement of the two-photon exchange contribution in elastic ep scattering at VEPP-3. / Gramolin, A. V.; Arrington, J.; Barkov, L. M.; Dmitriev, V. F.; Gauzshtein, V. V.; Golovin, R. A.; Holt, R. J.; Kaminsky, V. V.; Lazarenko, B. A.; Mishnev, S. I.; Muchnoi, N. Yu; Neufeld, V. V.; Nikolenko, D. M.; Rachek, I. A.; Sadykov, R. Sh; Shestakov, Yu V.; Stibunov, V. N.; Toporkov, D. K.; de Vries, H.; Zevakov, S. A.; Zhilich, V. N.

In: Nuclear Physics B - Proceedings Supplements, Vol. 225-227, 01.04.2012, p. 216-220.

Research output: Contribution to journalArticle

Gramolin, AV, Arrington, J, Barkov, LM, Dmitriev, VF, Gauzshtein, VV, Golovin, RA, Holt, RJ, Kaminsky, VV, Lazarenko, BA, Mishnev, SI, Muchnoi, NY, Neufeld, VV, Nikolenko, DM, Rachek, IA, Sadykov, RS, Shestakov, YV, Stibunov, VN, Toporkov, DK, de Vries, H, Zevakov, SA & Zhilich, VN 2012, 'Measurement of the two-photon exchange contribution in elastic ep scattering at VEPP-3', Nuclear Physics B - Proceedings Supplements, vol. 225-227, pp. 216-220. https://doi.org/10.1016/j.nuclphysbps.2012.02.045
Gramolin, A. V. ; Arrington, J. ; Barkov, L. M. ; Dmitriev, V. F. ; Gauzshtein, V. V. ; Golovin, R. A. ; Holt, R. J. ; Kaminsky, V. V. ; Lazarenko, B. A. ; Mishnev, S. I. ; Muchnoi, N. Yu ; Neufeld, V. V. ; Nikolenko, D. M. ; Rachek, I. A. ; Sadykov, R. Sh ; Shestakov, Yu V. ; Stibunov, V. N. ; Toporkov, D. K. ; de Vries, H. ; Zevakov, S. A. ; Zhilich, V. N. / Measurement of the two-photon exchange contribution in elastic ep scattering at VEPP-3. In: Nuclear Physics B - Proceedings Supplements. 2012 ; Vol. 225-227. pp. 216-220.
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AU - Gauzshtein, V. V.

AU - Golovin, R. A.

AU - Holt, R. J.

AU - Kaminsky, V. V.

AU - Lazarenko, B. A.

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AU - Muchnoi, N. Yu

AU - Neufeld, V. V.

AU - Nikolenko, D. M.

AU - Rachek, I. A.

AU - Sadykov, R. Sh

AU - Shestakov, Yu V.

AU - Stibunov, V. N.

AU - Toporkov, D. K.

AU - de Vries, H.

AU - Zevakov, S. A.

AU - Zhilich, V. N.

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AB - 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.

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