Exploring dark photons via a subfrequency laser searchin gravitational wave detectors

TL;DR

This paper proposes a novel method to detect dark photons using gravitational wave detectors by leveraging subfrequency laser signals, achieving significantly improved sensitivity over traditional light shining through the wall experiments.

Contribution

It introduces a new detection scheme for dark photons in gravitational wave experiments, inspired by LSW techniques, with enhanced sensitivity.

Findings

Sensitivity improved by two orders of magnitude over traditional LSW methods

Utilizes subfrequency laser signals as a new physics indicator

Proposes a mini-LHC setup for dark photon detection

Abstract

We propose a novel idea to detect a dark photon in gravitational wave experiments. Our setups are capable of performing the whole process of dark photon production, its decay products, and new physics signal discovery. This mini-LHC is inspired by the recent idea of dark photon detection using laser light in light shining through the wall (LSW) experiments such as ALPS II. Taking the subfrequency light emitted from the laser source as the new physics signal, we show that the sensitivity of our proposal is 2orders of magnitude better than the original idea in the LSW studies.