Neutrino mixing as a source for cosmological constant

TL;DR

This paper explores how neutrino mixing could contribute to the cosmological constant, offering a novel perspective distinct from traditional massive spinor field contributions, and examines field mixing in curved spacetime.

Contribution

It introduces a new mechanism by which neutrino mixing impacts the cosmological constant and analyzes field mixing in curved spacetime within Quantum Field Theory.

Findings

Neutrino mixing can produce a non-zero contribution to the cosmological constant.

The contribution from neutrino mixing differs fundamentally from that of massive spinor fields.

Field mixing in curved spacetime is studied for scalar fields in the Friedmann-Robertson-Walker metric.

Abstract

We report on recent results showing that neutrino mixing may lead to a non-zero contribution to the cosmological constant. This contribution is of a completely different nature with respect to the usual one by a massive spinor field. We also study the problem of field mixing in Quantum Field Theory in curved space-time, for the case of a scalar field in the Friedmann-Robertson-Walker metric.