Phenomenology of Dirac neutrino EFTs up to dimension six

TL;DR

This paper explores the phenomenology of Dirac neutrino effective field theories up to dimension six, analyzing their implications across particle physics, astrophysics, and cosmology.

Contribution

It provides a comprehensive analysis of the effects of dimension six operators in Dirac neutrino EFTs on various experimental and observational phenomena.

Findings

Constraints from electroweak precision tests and collider searches.

Implications for stellar cooling and cosmological degrees of freedom.

Effects on neutrino mass and low-energy observables.

Abstract

The gauge-singlet right-handed neutrinos would be essential to explain the tiny masses of active neutrinos. We consider the effective field theory of the Standard Model extended with these fields under the assumption that neutrinos are Dirac particles. In this framework, we provide a comprehensive study for the phenomenological consequences of various dimension six interactions employing various high and low energy observables. These include the neutrino mass itself, constraints from electroweak precision test and collider searches for lepton or jet plus missing energy, coherent neutrino-nucleus scattering, beta decays, as well as decays of proton, meson, tau, and top. We also study their astrophysical and cosmological implications for stellar cooling and relativistic degrees of freedom.