The Cabibbo angle as a universal seed for quark and lepton mixings

TL;DR

This paper proposes a unified model linking quark and lepton mixings through the Cabibbo angle, predicting neutrino mixing patterns and CP violation consistent with current data.

Contribution

It introduces a model-independent ansatz based on the Cabibbo angle that unifies quark and lepton mixing descriptions and predicts specific mixing angles and CP violation.

Findings

Predicted atmospheric neutrino mixing angle matches observations

Model accounts for leptonic CP violation in agreement with data

Requires two additional parameters beyond Wolfenstein parameters

Abstract

A model-independent ansatz to describe lepton and quark mixing in a unified way is suggested based upon the Cabibbo angle. In our framework neutrinos mix in a "Bi-Large" fashion, while the charged leptons mix as the "down-type" quarks do. In addition to the standard Wolfenstein parameters (lambda, A) two other free parameters are needed to specify the physical lepton mixing matrix. Through this simple assumption one makes specific predictions for the atmospheric angle as well as leptonic CP violation in good agreement with current observations.