Effective quantum gravity, cosmological constant and the Standard Model of particle physics

TL;DR

This paper explores how effective quantum gravity, combined with a non-zero cosmological constant, constrains physics beyond the Standard Model by analyzing the renormalization group and vacuum energy discrepancies.

Contribution

It introduces a consistent formulation of the renormalization group in effective quantum gravity using Vilkovisky-DeWitt effective action with a non-zero cosmological constant, linking it to Standard Model constraints.

Findings

Strong constraints on physics beyond the Standard Model

Discrepancy between vacuum cosmological constant and observed vacuum energy

Implications for late-time cosmology and quantum gravity

Abstract

The renormalization group in effective quantum gravity can be consistently formulated using the Vilkovisky and DeWitt version of effective action and assuming a non-zero cosmological constant. Taking into account that the vacuum counterpart of the cosmological constant is dramatically different from the observed energy density of vacuum, the running of the last quantity in the late cosmology indicates strong constraints on the physics beyond the minimal Standard Model of particle physics.