New global bounds on heavy neutrino mixing

2024/05/22 by Daniel Naredo-Tuero, Naredo-Tuero, Daniel
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle physics theoretical and experimental studies

paper · pdf · doi:10.48550/arxiv.2405.13760

openalex publication_date 2024/05/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

We present an updated and improved global fit analysis of precision and flavor observables so as to derive constraints on deviations from unitarity in the leptonic mixing matrix. We focus on the case in which these deviations are sourced by heavy neutrinos, such that our results can also be interpreted as bounds on their mixing with the active flavors. Our analysis is motivated by new results on key observables, such as M_W, |V_ud| and Γ_inv.

Related

• Bounds on lepton non-unitarity and heavy neutrino mixing
• Completely general bounds on Non-Unitary leptonic mixing
• Testing neutrino flavor models
• Misconceptions in Neutrino Oscillations in presence of a non-Unitary Mixing
• Neutrino Masses and Mixing