Neutrino Data, CP violation and Cosmological Implications

TL;DR

This paper discusses recent neutrino mass evidence, explores CP violation in leptonic mixing at different energy scales, and examines leptogenesis as a mechanism for the universe's matter-antimatter asymmetry.

Contribution

It analyzes CP violation in the leptonic sector within a seesaw framework and links low-energy CP phases to high-energy CP violation in specific models.

Findings

Leptogenesis can explain the baryon asymmetry of the universe.

Neutrino masses are constrained by experimental data.

Low-energy CP phases relate to high-energy CP violation in certain models.

Abstract

Recent experimental data provides evidence for neutrino masses and leads to the possibility of leptonic mixing and CP violation. In this work special attention is dedicated to CP violation in the leptonic sector both at low and at high energies in the framework of seesaw with only three righthanded neutrinos added to the Lagrangean of the Standard Model. It is shown that leptogenesis is a possible and likely explanation for the observed baryon asymmetry of the universe. In this case neutrino masses are constrained yet CP violating phases at low energies can only be related to CP violation at high energies in the context of specific models.