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Title: Compilation and analysis of charge asymmetry measurements from electron and positron scattering on nucleon and nuclei

World data on the lepton-charge asymmetry in the elastic and inelastic lepton scattering off the proton and nuclei are compiled and discussed. After reviewing the published results, we compare the elastic data to a model calculation of the two-photon-exchange mechanism. We show that the existing data do not provide any evidence for enhancement of the two-photon contribution. At confidence level 95% the data allow to exclude the two-photon exchange as an explanation for the difference between Rosenbluth and polarization transfer measurements of proton electromagnetic form factors.
Authors:
 [1] ;  [2] ; ;  [3]
  1. SPhN, CEA, IRFU (France)
  2. I.N.F.N. (Italy)
  3. JINR-BLTP (Russian Federation)
Publication Date:
OSTI Identifier:
22212686
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Atomic Nuclei; Journal Volume: 76; Journal Issue: 8; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ASYMMETRY; COMPARATIVE EVALUATIONS; ELECTROMAGNETIC FORM FACTORS; ELECTRONS; NUCLEI; PHOTONS; POLARIZATION; POSITRONS; PROTONS; SCATTERING