Two-photon exchange contribution in elastic electron-proton scattering, experiment at the VEPP-3 storage ring

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

doi:10.1051/epjconf/20146606002

EPJ Web of Conferences (Mar 2014)

Two-photon exchange contribution in elastic electron-proton scattering, experiment at the VEPP-3 storage ring

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

Affiliations

Nikolenko D.M.: Budker Institute of Nuclear Physics of SB RAS
Arrington J.: Argonne National Laboratory, Argonne
Barkov L.M.: Budker Institute of Nuclear Physics of SB RAS
Dmitriev V.F.
Gauzshtein V.V.: Nuclear Physics Institute of Tomsk Polytechnic University
Golovin R.A.: Budker Institute of Nuclear Physics of SB RAS
Gramolin A.V.: Budker Institute of Nuclear Physics of SB RAS
Holt R.J.: Argonne National Laboratory, Argonne
Kaminsky V.V.: Budker Institute of Nuclear Physics of SB RAS
Lazarenko B.A.: Budker Institute of Nuclear Physics of SB RAS
Mishnev S.I.: Budker Institute of Nuclear Physics of SB RAS
Muchnoi N.Yu.
Neufeld V.V.: Budker Institute of Nuclear Physics of SB RAS
Rachek I.A.: Budker Institute of Nuclear Physics of SB RAS
Sadykov R.Sh.: Budker Institute of Nuclear Physics of SB RAS
Shestakov Yu.V.
Stibunov V.N.: Nuclear Physics Institute of Tomsk Polytechnic University
Toporkov D.K.
de Vries H.: NIKHEF
Zevakov S.A.: Budker Institute of Nuclear Physics of SB RAS
Zhilich V.N.: Budker Institute of Nuclear Physics of SB RAS

DOI: https://doi.org/10.1051/epjconf/20146606002
Journal volume & issue: Vol. 66
p. 06002

Abstract

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We describe a precise measurement of the ratio of the (e+ p) to (e− p) elastic scattering cross sections. This comparison is sensitive to the effect of two-photon exchange contributions which may be the cause for inconsistent extractions of the proton form factors obtained using different methods. The experiment was performed at storage ring VEPP–3, Novosibirsk at energies of positron/electron beams of 1.0 and 1.6 GeV with electron/positron scattering angles θ = 65÷105° for the first case and 15÷25° and 55÷75° for the second case. Details of the experiment and the preliminary results are presented.

Published in EPJ Web of Conferences

ISSN: 2100-014X (Online)
Publisher: EDP Sciences
Country of publisher: France
LCC subjects: Science: Physics
Website: http://www.epj-conferences.org/

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