Spectral signatures of axionlike dark matter

Abstract

We derive spectral line shapes of the expected signal for a haloscope experiment searching for axionlike dark matter. The knowledge of these line shapes is needed to optimize an experimental design and data analysis procedure. We extend the previously known results for the axion-photon and axion-gluon couplings to the case of gradient (axion-fermion) coupling. A unique feature of the gradient interaction is its dependence not only on magnitudes but also on directions of velocities of galactic halo particles, which leads to the directional sensitivity of the corresponding haloscope. We also discuss the daily and annual modulations of the gradient signal caused by the Earth's rotational and orbital motions. In the case of detection, these periodic modulations will be an important confirmation that the signal is sourced by axionlike particles in the halo of our Galaxy.

Our Python code is available at https://github.com/gramolin/lineshape

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Cited by in corpus (10)

• NASDUCK: New Constraints on Axion-like Dark Matter from Floquet Quantum Detector
• Constraints on axion-like dark matter from a SERF comagnetometer
• Search for oscillations of fundamental constants using molecular spectroscopy
• Laboratory Constraints on the Neutron-Spin Coupling of feV-scale Axions
• Search for ultralight dark matter with spectroscopy of radio-frequency atomic transitions
• Search for dark-photon dark matter in the SuperMAG geomagnetic field dataset
• On the Sensitivity of Spin-Precession Axion Experiments
• Intensity interferometry for ultralight bosonic dark matter detection
• Dissecting axion and dark photon with a network of vector sensors
• Improved bounds on ultralight scalar dark matter in the radio-frequency range