Abstract
We point out that a cold dark matter condensate made of gauge bosons from an extra hidden U(1) sector—dubbed hidden photons—can create a small, oscillating electric density current. Thus, they could also be searched for in the recently proposed LC-circuit setup conceived for axion cold dark matter search by Sikivie, Sullivan and Tanner. We estimate the sensitivity of this setup for hidden-photon cold dark matter and we find it could cover a sizable, so far unexplored parameter space.
Highlights
Nowadays, direct dark matter searches are mainly taking two alternative and complementary routes: one of them aims to detect high-mass candidates—so-called Weakly Interacting Massive Particles (WIMPs)—exploiting scattering experiments [1], and the other one looks for light mass candidates— so-called Weakly Interacting Slim Particles (WISPs)—using precision experiments and strong magnetic fields [2].Among WISPs, the axion is a prime candidate
We estimate the sensitivity of this setup for hidden-photon cold dark matter and we find it could cover a sizable, so far unexplored parameter space
In this study we want to revisit the proposal made by Sikivie, Sullivan and Tanner [20], in which they explore the particular form taken by the Maxwell equations if the axion cold dark matter (CDM) is present
Summary
Direct dark matter searches are mainly taking two alternative and complementary routes: one of them aims to detect high-mass candidates—so-called Weakly Interacting Massive Particles (WIMPs)—exploiting scattering experiments [1], and the other one looks for light mass candidates— so-called Weakly Interacting Slim Particles (WISPs)—using precision experiments and strong magnetic fields [2]. In this study we want to revisit the proposal made by Sikivie, Sullivan and Tanner [20], in which they explore the particular form taken by the Maxwell equations if the axion CDM is present This new setup has interesting features; the first is the simplicity of the idea, namely an LC-circuit carrying an electric current generated by CDM axions in an external magnetic field. The aim of this letter is to show that hidden-photon CDM can provide an oscillating electric current, without the need of an external electromagnetic field, which can act as a source for the proposed experiment [20] This setup can hunt for these particles.
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