The Phenomenology of Quadratically Coupled Ultra Light Dark Matter

Abstract

We discuss models of ultralight scalar Dark Matter (DM) with linear and quadratic couplings to the Standard Model (SM). In addition to studying the phenomenology of linear and quadratic interactions separately, we examine their interplay. We review the different experiments that can probe such interactions and present the current and expected future bounds on the parameter space. In particular, we discuss the scalar field solution presented in [A. Hees, O. Minazzoli, E. Savalle, Y. V. Stadnik and P. Wolf, Phys.Rev.D 98 (2018) 6, 064051], and extend it to theories that capture both the linear and the quadratic couplings of the DM field to the SM. Furthermore, we discuss the theoretical aspects and the corresponding challenges for natural models in which the quadratic interactions are of phenomenological importance.

73 pages, 17 figures; v2: References added. Matches the JHEP accepted version

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• Robust Quantum Control via Multipath Interference for Thousandfold Phase Amplification in a Resonant Atom Interferometer
• Background-Induced Forces from Dark Relics
• Blowing in the Dark Matter Wind
• Prospects of nuclear-coupled-dark-matter detection via correlation spectroscopy of I${}_2^{+}$ and Ca${}^{+}$
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• Thermo-Coupled Early Dark Energy
• Demonstration that Differential Length Changes of Optical Cavities are a Sensitive Probe for Ultralight Dark Matter
• Direct Detection of Ultralight Dark Matter via Charged Lepton Flavor Violation
• Search for a solar-bound axion halo using the Global Network of Optical Magnetometers for Exotic physics searches
• Probing New Forces with Nuclear Clocks
• Torsion Balance Experiments Enable Direct Detection of Sub-eV Dark Matter
• Dark matter pair absorption
• Probing Quadratically Coupled Ultralight Dark Matter with Pulsar Timing Arrays