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

Abstract : 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 the two-photon contribution. At significance level 0.05 the data allow to exclude the two-photon exchange as an explanation for the difference between Rosenbluth and polarization measurements of proton electromagnetic form factors.
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http://hal.in2p3.fr/in2p3-00710567
Contributor : Sophie Heurteau <>
Submitted on : Thursday, June 21, 2012 - 10:23:58 AM
Last modification on : Wednesday, September 16, 2020 - 4:07:35 PM

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E. Tomasi-Gustafsson, M. Osipenko, E. A. Kuraev, Yu. Bystritsky. Compilation and analysis of charge asymmetry measurements from electron and positron scattering on nucleon and nuclei. Physics of Atomic Nuclei / Yadernaya Fizika, MAIK Nauka/Interperiodica, 2013, 76, pp.937-946. ⟨10.1134/S106377881308022X⟩. ⟨in2p3-00710567⟩

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