Ferromagnetic detection of moduli dark matter

TL;DR

This paper proposes a nonresonant ferromagnetic detection method for light scalar moduli dark matter, capable of exploring a broad parameter space without prior knowledge of the moduli mass.

Contribution

It introduces a novel nonresonant detection scheme using ferromagnets to search for moduli dark matter over a wide mass range.

Findings

Effective detection over several orders of magnitude in moduli mass.

Nonresonant approach allows broader parameter space exploration.

Potential to improve constraints on moduli-electron coupling.

Abstract

We propose a scheme to detect light scalar moduli dark matter, based on measuring the change of magnetization induced in a macroscopic hard ferromagnet. Our method can probe moduli dark matter at the natural coupling to the electron mass over several orders of magnitude in the moduli mass. The most attracting feature of the proposed approach, compared to mechanical ones, is that it relies on a nonresonant detection, allowing to probe a much wider region of the parameter space. This is a crucial point, as long as the theory is not able to predict the moduli mass.