Confronting the seesaw mechanism with neutrino oscillations: a general and explicit analytical bridge

TL;DR

This paper provides a comprehensive analytical framework for understanding neutrino oscillations within the seesaw mechanism, enabling direct testing of the model's predictions at low energies.

Contribution

It introduces the first general, explicit analytical calculations linking the seesaw mechanism to neutrino oscillation parameters in a model-independent way.

Findings

Analytical expressions for neutrino mass-squared differences

Explicit formulas for flavor mixing angles

Calculation of the effective Dirac CP-violating phase

Abstract

With the help of a full Euler-like block parametrization of the flavor structure for the canonical seesaw mechanism, we present the first general and explicit analytical calculations of the two neutrino mass-squared differences, three flavor mixing angles and the effective Dirac CP-violating phase responsible for the primary behaviors of neutrino oscillations. Such model-independent results will pave the way for testing the seesaw mechanism at low energies.