# Results from a Hidden Photon Dark Matter Search Using a Multi-Cathode Counter

## TL;DR

This paper reports measurements of electron emission rates from a counter filled with argon and methane, interpreting results as potential evidence for hidden photon dark matter and setting upper limits on their properties.

## Contribution

It introduces a novel application of a multi-cathode counter technique to search for hidden photon dark matter, providing new upper limits and future search strategies.

## Key findings

- Set upper limits for hidden photon interactions with dark matter
- Demonstrated electron emission rates possibly linked to hidden photons
- Discussed future improvements for hidden photon detection

## Abstract

Here we present measurements of the rates of emission of single electrons from the cathode of a proportional counter filled with a mixture of Ar + CH4 (10%) at 1 bar. We interpret the results as a possible photoelectric effect associated with hidden photons (HPs). Our results set upper limits for HPs from cold dark matter (CDM). We also discuss future options for searches for HPs from CDM using a multi-cathode counter technique.