# Predicting neutrino oscillations with "bi-large" lepton mixing matrices

## TL;DR

This paper introduces two models for lepton mixing matrices that connect neutrino and charged lepton sectors, predicting specific oscillation parameters and CP violation phases based on a simplified parameter dependence.

## Contribution

It presents novel schemes for the lepton mixing matrix with CP conservation in neutrinos and CP violation arising from the charged lepton sector, linking mixing angles to the Cabibbo angle.

## Key findings

- Predicted narrow ranges for solar and accelerator angles.
- Estimated CP phase around 1.3π.
- Dependence on a single parameter simplifies oscillation predictions.

## Abstract

We propose two schemes for the lepton mixing matrix $U = U_l^\dagger U_\nu$, where $U = U_l$ refers to the charged sector, and $U_\nu$ denotes the neutrino diagonalization matrix. We assume $U_\nu$ to be CP conserving and its three angles to be connected with the Cabibbo angle in a simple manner. CP violation arises solely from the $U_l$, assumed to have the CKM form, $U_l\simeq V_{\rm CKM}$, suggested by unification. Oscillation parameters depend on a single parameter, leading to narrow ranges for the "solar" and "accelerator" angles $\theta_{12}$ and $\theta_{23}$, as well as for the CP phase, predicted as $\delta_{\rm CP}\sim 1.3\pi$.