Neutrino Mass Anarchy

TL;DR

This paper argues that the neutrino mass matrix, which explains neutrino oscillations, can be effectively modeled as a random matrix rather than having an ordered, symmetry-driven structure, challenging conventional assumptions.

Contribution

It introduces the idea that neutrino mass matrices may be inherently random, providing an alternative to the symmetry-based models commonly assumed.

Findings

Random mass matrices fit neutrino oscillation data well

Ordered models are not uniquely favored by current data

Supports the 'anarchy' hypothesis in neutrino physics

Abstract

What is the form of the neutrino mass matrix which governs the oscillations of the atmospheric and solar neutrinos? Features of the data have led to a dominant viewpoint where the mass matrix has an ordered, regulated pattern, perhaps dictated by a flavor symmetry. We challenge this viewpoint, and demonstrate that the data are well accounted for by a neutrino mass matrix which appears to have random entries.