The cosmological constant, neutrino masses and parity symmetry in 6+1 dimensions

TL;DR

This paper proposes a 6-dimensional model linking the cosmological constant and neutrino masses through a spontaneously broken scalar field, restoring parity symmetry and explaining the small vacuum energy density.

Contribution

It introduces a novel 6-dimensional framework that connects neutrino masses and the cosmological constant via a new scalar field, restoring parity symmetry.

Findings

A natural mechanism for small vacuum energy density

Unified origin for neutrino masses and cosmological constant

Restoration of parity symmetry in higher dimensions

Abstract

In this paper we propose that the cosmological constant scale and neutrino masses have a common origin: a new spontaneously broken scalar field. This hypothesis is implemented in a 6-space dimensional model that restores the parity symmetry. The 6-dimensional parity symmetry gives a natural mechanism for the smallness of the vacuum energy density.