# Using a non-minimal coupling between matter and curvature to sequester the Cosmological Constant

## TL;DR

This paper proposes a new mechanism involving non-minimal matter-curvature coupling to generate and sequester the Cosmological Constant, addressing the longstanding cosmological constant problem.

## Contribution

It introduces a novel model with non-minimal coupling that combines features of Unimodular gravity and vacuum sequestering to solve the cosmological constant problem.

## Key findings

- The model successfully sequesters vacuum energy contributions.
- It avoids the traditional cosmological constant problem.
- Shares features with Unimodular gravity and recent sequestering proposals.

## Abstract

We present a novel mechanism for generating a Cosmological Constant and suitably sequestering the vacuum contribution to it, so that the eponymous Cosmological Constant problem is avoided. We do so by resorting to a model endowed with a non-minimal coupling between curvature and matter in an appropriately defined relaxed regime, and show that this shares features with both Unimodular gravity as well as a recent proposal to sequester the vacuum contribution through the use of an external term to the action functional.