# Laser interferometer response to scalar massive gravitational waves

## TL;DR

This paper investigates how laser interferometers respond to scalar massive gravitational waves, providing a compact response form and analyzing angular and frequency features within different gauges, including the massive Brans-Dicke theory.

## Contribution

It presents a unified analysis of interferometer response to scalar massive gravitational waves in multiple gauges and extends to solutions in the massive Brans-Dicke theory.

## Key findings

- Derived a compact response formula for scalar massive waves.
- Analyzed angular and frequency response characteristics.
- Solved linearized vacuum equations in different gauges for Brans-Dicke theory.

## Abstract

We analyze the response of the gravitational wave detector to a scalar massive plane gravitational wave. We give the compact form of the response and discuss its angular and frequency characteristics. The derivations is carried out in the conformal and the synchronous gauges and the equivalence of the two approaches is shown. In the case of the massive Brans-Dicke theory we solve the linearized vacuum field equations in the two gauges as well.