Model independent study of massive lepton elastic scattering on the proton, beyond the Born approximation

G. I. Gakh; M. Konchatnyi; A. Dbeyssi; E. Tomasi-Gustafsson

doi:10.1016/j.nuclphysa.2014.12.003

Model independent study of massive lepton elastic scattering on the proton, beyond the Born approximation

Nuclear Theory 2015-05-20 v1 High Energy Physics - Phenomenology

Authors: G. I. Gakh , M. Konchatnyi , A. Dbeyssi , E. Tomasi-Gustafsson

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Abstract

Model independent expressions for all polarization observables in $\mu+p\to \mu+p$ elastic scattering are obtained, taking into account the lepton mass and including the two-photon exchange contribution. The spin structure of the matrix element is parametrized in terms of six independent complex amplitudes, functions of two independent kinematical variables. General statements about the influence of the two--photon--exchange terms on the differential cross section and on polarization observables are given. Polarization effects have been investigated for the case of a longitudinally polarized lepton beam and polarized nucleon in the final state.

Keywords

elastic scattering lepton mass two-photon exchange polarization observables model-independent spin amplitudes

Cite

@article{arxiv.1408.2723,
  title  = {Model independent study of massive lepton elastic scattering on the proton, beyond the Born approximation},
  author = {G. I. Gakh and M. Konchatnyi and A. Dbeyssi and E. Tomasi-Gustafsson},
  journal= {arXiv preprint arXiv:1408.2723},
  year   = {2015}
}

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28 pages, 3 figures

Model independent study of massive lepton elastic scattering on the proton, beyond the Born approximation

Abstract

Keywords

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