HAL : in2p3-00710567, version 1

arXiv : 0909.4736

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

E. Tomasi-Gustafsson1, 2, M. Osipenko, E. A. Kuraev, Yu. Bystritsky

(2012)

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.

1 :	IPNO - Institut de Physique Nucléaire d'Orsay
2 :	IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)

Thème(s)

:

Physique/Physique des Hautes Energies - Phénoménologie

in2p3-00710567, version 1

http://hal.in2p3.fr/in2p3-00710567

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Contributeur : Sophie Heurteau <>

Soumis le : Jeudi 21 Juin 2012, 10:23:58

Dernière modification le : Jeudi 21 Juin 2012, 11:27:03