Relaxion Stars and their detection via Atomic Physics

Abstract

The cosmological relaxion can address the hierarchy problem, while its coherent oscillations can constitute dark matter in the present universe. We consider the possibility that the relaxion forms gravitationally bound objects that we denote as relaxion stars. The density of these stars would be higher than that of the local dark matter density, resulting in enhanced signals in table-top detectors, among others. Furthermore, we raise the possibility that these objects may be trapped by an external gravitational potential, such as that of the Earth or the Sun. This leads to formation of relaxion halos of even greater density. We discuss several interesting implications of relaxion halos, as well as detection strategies to probe them.

17 pages, 6 figures; v2: minor revisions, matches published version

References in corpus (47)

• Particle Dark Matter: Evidence, Candidates and Constraints
• Supersymmetric Dark Matter
• Dark Matter Search Results from a One Tonne$\times$Year Exposure of XENON1T
• Search for New Physics with Atoms and Molecules
• A History of Dark Matter
• Cosmic Structure as the Quantum Interference of a Coherent Dark Wave
• Test of the Equivalence Principle Using a Rotating Torsion Balance
• Cosmological Relaxation of the Electroweak Scale
• Hunting for topological dark matter with atomic clocks
• First constraints on fuzzy dark matter from Lyman-$\alpha$ forest data and hydrodynamical simulations
• Axion Miniclusters and Bose Stars
• Gravitational wave detection with optical lattice atomic clocks
• The MICROSCOPE mission: first results of a space test of the Equivalence Principle
• A review of indirect searches for particle dark matter
• Constraining the mass of light bosonic dark matter using SDSS Lyman-$\alpha$ forest
• Progress in Atomic Fountains at LNE-SYRTE
• Gravitational Bose-Einstein condensation in the kinetic regime
• Can dark matter induce cosmological evolution of the fundamental constants of Nature?
• Search for ultralight scalar dark matter with atomic spectroscopy
• Searching for an oscillating massive scalar field as a dark matter candidate using atomic hyperfine frequency comparisons
• MICROSCOPE mission: first constraints on the violation of the weak equivalence principle by a light scalar dilaton
• Early seeds of axion miniclusters
• Dark Matter Searches at Colliders
• Sound of Dark Matter: Searching for Light Scalars with Resonant-Mass Detectors
• Constraints on Dark Matter in the Solar System
• Detecting dark matter waves with precision measurement tools
• Relaxation in a Fuzzy Dark Matter Halo
• Search for domain wall dark matter with atomic clocks on board global positioning system satellites
• Formation and mass growth of axion stars in axion miniclusters
• Phenomenology of relaxion-Higgs mixing
• Relaxation from particle production
• Improved limits on interactions of low-mass spin-0 dark matter from atomic clock spectroscopy
• Is the Relaxion an Axion?
• Searching for ultra-light dark matter with optical cavities
• Scalar dark matter in the radio-frequency band: atomic-spectroscopy search results
• Constraints on Relaxion Windows
• Relaxion and light (pseudo)scalars at the HL-LHC and lepton colliders
• Constraining Rapidly Oscillating Scalar Dark Matter Using Dynamic Decoupling
• The Hierarchion, a Relaxion Addressing the Standard Model's Hierarchies
• Overview of the Cosmic Axion Spin Precession Experiment (CASPEr)
• Actinide ions for testing the spatial $\alpha -$variation hypothesis
• The Nelson-Barr Relaxion
• Large Higgs-electron Yukawa coupling in 2HDM
• Out-of-the-box Baryogenesis During Relaxation
• Scattering of light dark matter in atomic clocks
• Sensitivity coefficients to variation of fundamental constants
• Neutrino Velocity and the Variability of Fundamental Constants

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