Effective cosmological constant from TeV-scale physics: Simple field-theoretic model

TL;DR

This paper proposes a simple field-theoretic model based on q-theory that explains the observed small cosmological constant using TeV-scale particles, involving only a few fields and two energy scales.

Contribution

It introduces a minimal model linking TeV-scale physics to the cosmological constant problem through q-theory.

Findings

The model naturally produces an effective cosmological constant of order (meV)^4.

It requires only a few fields and two energy scales, E_{Planck} and E_{ew}.

The approach aligns with observed vacuum energy density.

Abstract

Adopting the q-theory approach to the cosmological constant problem, a simple field-theoretic model is presented which generates an effective cosmological constant (remnant vacuum energy density) of the observed order of magnitude, \Lambda_{eff} \sim (meV)^4, if there exist new TeV-scale ultramassive particles with electroweak interactions. The model is simple, in the sense that it involves only a few types of fields and two energy scales, the gravitational energy scale E_{Planck}\sim 10^{15} TeV and the electroweak (new-physics) energy scale E_{ew}\sim 1-10 TeV.