Black Hole Portal into Hidden Valleys

Abstract

Superradiant instability turns rotating astrophysical black holes into unique probes of light axions. We consider what happens when a light axion is coupled to a strongly coupled hidden gauge sector. In this case superradiance results in an adiabatic increase of a hidden sector CP-violating $\theta$-parameter in a near horizon region. This may trigger a first order phase transition in the gauge sector. As a result a significant fraction of a black hole mass is released as a cloud of hidden mesons and can be later converted into electromagnetic radiation. This results in a violent electromagnetic burst. The characteristic frequency of such bursts may range approximately from 100 eV to 100 MeV.

17 pages, 2 figures

References in corpus (20)

• Collapsars - Gamma-Ray Bursts and Explosions in "Failed Supernovae"
• String Axiverse
• The Physics of Gamma-Ray Bursts
• A Theory of Dark Matter
• Gamma-Ray Bursts
• The Low-Energy Frontier of Particle Physics
• Echoes of a Hidden Valley at Hadron Colliders
• Dynamics of collapsing and exploding Bose-Einstein condensates
• New Fixed-Target Experiments to Search for Dark Gauge Forces
• Exploring the String Axiverse with Precision Black Hole Physics
• Updated Bounds on Milli-Charged Particles
• Exploring Portals to a Hidden Sector Through Fixed Targets
• Theta Dependence In The Large N Limit Of Four-Dimensional Gauge Theories
• Macroscopic Strings and "Quirks" at Colliders
• Goldstini
• Quark Masses and Chiral Symmetry
• QCD at θ\sim π
• String Photini at the LHC
• QCD Vacuum and Axions: What's Happening?
• Domain Walls and Decay Rate of the Excited Vacua in the Large N Yang-Mills Theory

Cited by in corpus (10)

• Discovering the QCD Axion with Black Holes and Gravitational Waves
• Numerical simulations of single and binary black holes in scalar-tensor theories: circumventing the no-hair theorem
• Cosmic Black-Hole Hair Growth and Quasar OJ287
• Axion monodromy in a model of holographic gluodynamics
• Galactic Center Gamma-Ray Excess through a Dark Shower
• Cosmology of Axions and Moduli: A Dynamical Systems Approach
• Self-organized criticality in boson clouds around black holes
• Vacuum structure of Yang-Mills theory as a function of $\theta$
• θ-angle monodromy in two dimensions
• QCD, Flavor, and the de Sitter Swampland