Cosmological constant in broken maximal sugras

TL;DR

This paper investigates how the cosmological constant behaves in broken maximally supersymmetric supergravity theories and their embeddings in string and M-theory, showing consistency with astrophysical data.

Contribution

It provides a detailed analysis of the cosmological constant's form in loop expansions of broken supergravity and its compatibility with string and M-theory frameworks.

Findings

Supersymmetry breaking at TeV scale yields cosmological constant values matching observations.

Perturbative quantum effects are consistent with the observed parameter regime.

The form of the cosmological constant aligns with current astrophysical data.

Abstract

We examine the form of the cosmological constant in the loop expansion of broken maximally supersymmetric supergravity theories, and after embedding, within superstring and M-theory. Supersymmetry breaking at the TeV scale generates values of the cosmological constant that are in agreement with current astrophysical data. The form of perturbative quantum effects in the loop expansion is consistent with this parameter regime.