BSM $\nu$ physics: complementarity across energies -- a white paper for Snowmass 2021

TL;DR

This paper discusses how low-energy experiments and high-energy colliders together enhance the search for new physics related to neutrino properties, highlighting their complementary roles across different energy scales.

Contribution

It provides a comprehensive analysis of the complementarity between low- and high-energy experiments in probing neutrino mass models and new physics scenarios.

Findings

Demonstrates correlations between signals at different energies.

Analyzes physics reach for Seesaw models Type I, II, III.

Explores effective field theory and $Z'$ models.

Abstract

We reiterate that there is significant complementarity between low-energy experiments and high-energy colliders in exploring new physics associated with neutrino properties and their mass generation mechanisms. Signals of the new physics in the two energy regimes may be correlated with each other from the same underlying dynamics. We demonstrate the complementary nature by presenting the physics reaches for the Seesaw models of Type I, II and III, and for general neutrino interactions in an effective field theory framework, and in a $Z'$ model.