Looking for Hidden Photon's Cold Dark Matter By Multi-Cathode Counter

TL;DR

This paper explores the potential of a multi-cathode counter to detect hidden photon dark matter by measuring electron emission rates, providing preliminary limits and discussing future research directions.

Contribution

It introduces a novel method using a multi-cathode counter to search for hidden photon dark matter and presents initial experimental results and upper limits.

Findings

Upper limit of 4.3x10^-23 for hidden photon parameter at 2 sigma

Preliminary measurements at different temperatures

Method demonstrates potential for future dark matter searches

Abstract

The dark rate of single-electrons emitted from a cathode of a multi-cathode counter may be interpreted as the effect from Hidden Photons (HPs) of Cold Dark Matter (CDM). As a tentative approach the measurements have been performed at different temperatures of the counter. Preliminary results of measurements by using a counter with a copper cathode are presented. An upper limit of 4.3x10-23 for parameter ksi^2 at 2 sigma has been obtained for hypothetical conversion of hidden photon to real photon at the metallic surface with the resulting emission of single electron. The work is considered as a pure illustration of the method and the perspectives are discussed for future search of HPs by a multi-cathode counter.