Effective gravity and OSp(N,4) invariant matter

TL;DR

This paper revisits an OSp(N,4) invariant superfield model, analyzing how gravitational renormalization impacts the cosmological constant without altering higher-order tensors, shedding light on the cosmological constant problem.

Contribution

It demonstrates that gravitational renormalization affects only the cosmological term, providing insights into the stability of higher-order tensor structures in supergravity models.

Findings

Renormalization modifies only the cosmological constant.

Higher-order tensors remain unaffected by gravitational renormalization.

The results offer a potential explanation for the smallness of the cosmological constant.

Abstract

We re-examine the OSp(N,4) invariant interacting model of massless chiral and gauge superfields, whose superconformal invariance was instrumental, both in proving the all-order no-renormalization of the mass and chiral self-interaction lagrangians, and in determining the linear superfield renormalization needed. We show that the renormalization of the gravitational action modifies only the cosmological term, without affecting higher-order tensors. This could explain why the effect of the cosmological constant is shadowed by the effects of newtonian gravity.