Constraints on the Coupling between Axionlike Dark Matter and Photons Using an Antiproton Superconducting Tuned Detection Circuit in a Cryogenic Penning Trap

Abstract

We constrain the coupling between axionlike particles (ALPs) and photons, measured with the superconducting resonant detection circuit of a cryogenic Penning trap. By searching the noise spectrum of our fixed-frequency resonant circuit for peaks caused by dark matter ALPs converting into photons in the strong magnetic field of the Penning-trap magnet, we are able to constrain the coupling of ALPs with masses around 2.7906-2.7914 neV=c 2 to g aγ < 1 × 10 −11 GeV −1 . This is more than one order of magnitude lower than the best laboratory haloscope and approximately 5 times lower than the CERN axion solar telescope (CAST), setting limits in a mass and coupling range which is not constrained by astrophysical observations. Our approach can be extended to many other Penning-trap experiments and has the potential to provide broad limits in the low ALP mass range.

Dipole radiation and beyond from axion stars in electromagnetic fields

“…While originally motivated as a solution to the strong CP problem [18][19][20], they are ubiquitous in many high energy physics theories [21][22][23][24]. A variety of experimental efforts are underway to detect axions and axion-like particles (ALPs) in the laboratory [25][26][27][28] and through their unique astrophysical and cosmological signatures [29][30][31][32][33][34][35][36][37][38]. Many of these searches rely upon a coupling of the axion field φ(x, t) to electromagnetism via the interaction g aγ φE • B.…”

Sympathetic cooling of a trapped proton mediated by an LC circuit

“…We also demonstrate the cooling of a resonant mode of a macroscopic LC circuit with laser-cooled ions and sympathetic cooling of an individually trapped proton, reaching temperatures far below the environmental temperature. Notably, as this technique uses only image–current interactions, it can be easily applied to an experiment with antiprotons 1 , facilitating improved precision in matter–antimatter comparisons 11 and dark matter searches 12 , 13 .…”

Feebly-interacting particles: FIPs 2020 workshop report

“…Similarly, the more recent result from the ADMX SLIC pilot experiment has probed a few narrow regions around 2 × 10 −7 eV and down to ∼ 10 −12 GeV −1 [557]. Finally, the BASE experiment, whose main goal is the study of antimatter at CERN, has recently released a result adapting its setup to the search of axions following this concept [558]. In general, this technique could reach sensitivity down to the QCD axion for masses m a 10 −6 eV, if implemented in magnet volumes of few m 3 volumes and few T fields.…”