Low energy analysis of nu N --> nu N gamma in the Standard Model

Details Low energy analysis of nu N --> nu N gamma in the Standard Model Low energy analysis of nu N --> nu N gamma in the Standard Model

2009-05-04

arxiv.org/abs/0905.0291v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

47 pages, 10 figures

Scientific paper

The production of single photons in low energy (~1 GeV) neutrino scattering off nucleons is analyzed in the Standard Model. At very low energies, E(nu) << 1 GeV, a simple description of the chiral lagrangian involving baryons and arbitrary SU(2)_L x U(1)_Y gauge fields is developed. Extrapolation of the process into the ~1-2 GeV region is treated in a simple phenomenological model. Coherent enhancements in compound nuclei are studied. The relevance of single photon events as a background to experimental searches for nu(mu) --> nu(e) is discussed. In particular, single photons are a plausible explanation for excess events observed by the MiniBooNE experiment.

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