Published April 2012 | Version v1
Journal article Metadata-only

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

Creators

  • 1. Budker Institute of Nuclear Physics of SB RAS, Novosibirsk (Russian Federation)
  • 2. Argonne National Laboratory, Argonne (United States)
  • 3. Novosibirsk State University, Novosibirsk (Russian Federation)
  • 4. Nuclear Physics Institute of Tomsk Polytechnic University, Tomsk (Russian Federation)
  • 5. NIKHEF, Amsterdam (Netherlands)

Description

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.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.nuclphysbps.2012.02.045

Additional details

Identifiers

DOI
10.1016/j.nuclphysbps.2012.02.045;
arXiv
arXiv:1112.5369v1;
PII
S0920-5632(12)00062-X;

Publishing Information

Journal Title
Nuclear Physics. B, Proceedings Supplements
Journal Volume
225-227
Journal Page Range
p. 216-220
ISSN
0920-5632
CODEN
NPBSE7

Conference

Title
International workshop on e"+e"- collisions from #phi# to #psi#
Acronym
PHIPSI11
Dates
19-22 Sep 2011
Place
Novosibirsk (Russian Federation)

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
43112641
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Conference
Descriptors DEI
BEAMS; CROSS SECTIONS; ELASTIC SCATTERING; ELECTROMAGNETIC FORM FACTORS; ELECTRON-POSITRON COLLISIONS; ELECTRON-POSITRON INTERACTIONS; ELECTRON-PROTON INTERACTIONS; ELECTRONS; GEV RANGE 01-10; PHOTONS; POSITRONS; PROTONS; RADIATIVE CORRECTIONS; VEPP-3
Descriptors DEC
ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; BARYONS; BOSONS; COLLISIONS; CORRECTIONS; DIMENSIONLESS NUMBERS; ELECTRON COLLISIONS; ELECTRON-NUCLEON INTERACTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; FORM FACTORS; GEV RANGE; HADRONS; INTERACTIONS; LEPTON-BARYON INTERACTIONS; LEPTON-HADRON INTERACTIONS; LEPTON-LEPTON INTERACTIONS; LEPTON-NUCLEON INTERACTIONS; LEPTONS; MASSLESS PARTICLES; MATTER; NUCLEONS; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; POSITRON COLLISIONS; SCATTERING; STORAGE RINGS

Optional Information

Copyright
Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.