Single photon production $\nu_l N\rightarrow \nu_l N \gamma$ in neutrino-nucleon scattering

TL;DR

This paper extends a unified model to evaluate the radiative neutrino-nucleon scattering cross section, revealing increased contributions near the $elta$ resonance, which is crucial for precise neutrino detection experiments.

Contribution

It provides the first consistent theoretical evaluation of the radiative $ u_l N ightarrow u_l N \gamma$ cross section across relevant energy regions.

Findings

Results align with previous low-energy estimates.

Increment observed near the $elta$ resonance region.

Supports improved background modeling in neutrino experiments.

Abstract

The quasielastic charged current (CCQE) $\nu_e n \rightarrow e^- p$ scattering is the dominant mechanism to detect appearance of a $\nu_e$ in an almost $\nu_\mu$ flux at the 1 GeV scale. Actual experiments show a precision below 1% and between less known background contributions, but necessary to constraint the event excess, we have the radiative corrections. A consistent model recently developed for the simultaneous description of elastic and radiative $\pi N$ scattering, pion-photoproduction and single pion production processes, both for charged and neutral current neutrino-nucleon scattering, is extended for the evaluation of the radiative $\nu_l N\rightarrow \nu_l N \gamma$ cross section. Our results are similar to a previous (but inconsistent) theoretical evaluation in the low energy region, and show an increment in the upper region where the $\Delta$ resonance becomes relevant.