Non-unitarity effects in the minimal inverse seesaw model

TL;DR

This paper investigates how non-unitarity effects in a minimal inverse seesaw model with TeV-scale neutrinos can lead to distinctive non-standard neutrino interactions, flavor, and CP violation patterns.

Contribution

It introduces a minimal inverse seesaw framework focusing on non-unitarity and non-standard interactions, highlighting potential non-decoupling effects at TeV scales.

Findings

Enhanced non-decoupling effects influence flavor and CP violation

Distinct non-standard neutrino interaction patterns emerge

Non-unitarity impacts the effective lepton mixing matrix

Abstract

A minimal version of the inverse seesaw model featuring only two pairs of TeV-scale singlet neutrinos is discussed from the perspective of non-standard neutrino interactions. A particular attention is paid to the non-standard patterns of flavour and CP violation emerging due to the possibly enhanced non-decoupling effects of the heavy sector and the associated non-unitarity of the effective lepton mixing matrix.