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arXiv · 1304.2702

Photon emission in neutral current interactions with nucleons and nuclei

L. Alvarez-Ruso·J. Nieves·E. Wang
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Abstract

We report on our study of photon emission induced by Enu ~ 1 GeV (anti)neutrino neutral current interactions with nucleons and nuclei. This process is an important background for nu_e appearance oscillation experiments. At the relevant energies, the reaction is dominated by the excitation of the Delta (1232) resonance but there are also non-resonant contributions that, close to threshold, are fully determined by the effective chiral Lagrangian of strong interactions. We have obtained differential and integrated cross section for the (anti)neutrino-nucleon scattering and compare them with previous results. Furthermore, we have extended the model to nuclear targets taking into account Fermi motion, Pauli blocking and the in-medium modifications of the Delta properties. This study is important in order to reduce systematic effects in neutrino oscillation experiments.

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L. Alvarez-Ruso, J. Nieves, E. Wang. 2013-04-09. Photon emission in neutral current interactions with nucleons and nuclei. https://arxiv.org/abs/1304.2702

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