Coherent Neutrino Scattering

TL;DR

This paper develops a detailed microscopic model for neutrino-induced coherent pion production off nuclei, incorporating non-resonant backgrounds and nuclear medium effects, leading to significant differences from traditional models in low-energy regimes.

Contribution

It introduces a comprehensive microscopic approach that extends beyond Delta resonance dominance by including non-resonant backgrounds and nuclear medium modifications.

Findings

Cross sections are significantly modified at low energies.

The model predicts different results compared to phenomenological models.

Nuclear medium effects are crucial for accurate predictions.

Abstract

We present a microscopic model for coherent pion production off nuclei induced by neutrinos. This model is built upon a model for single nucleon processes that goes beyond the usual Delta dominance by including non resonant background contributions. We include nuclear medium effects: medium corrections to Delta$ properties and outgoing pion absortion via an optical potential. This results in major modifications to cross sections for low energy experiments when compared with phenomenological models like Rein-Sehgal's.