On the Detection of a Scalar Stochastic Background of Gravitational Waves

TL;DR

This paper evaluates the sensitivity of upcoming laser interferometers and spherical resonant mass detectors to detect a scalar stochastic gravitational wave background, considering different scalar field coupling scenarios.

Contribution

It provides the first detailed analysis of scalar background detection prospects with future gravitational wave detectors, including minimal and non-minimal coupling cases.

Findings

Sensitivity estimates for scalar background detection

Impact of scalar field coupling on detector response

Guidance for future gravitational wave experiments

Abstract

In the near future we will witness the coming to a full operational regime of laser interferometers and resonant mass detectors of spherical shape. In this work we study the sensitivity of pairs of such gravitational wave detectors to a scalar stochastic background of gravitational waves. Our computations are carried out both for minimal and non minimal coupling of the scalar fields.