Photon Production of Axionic Cold Dark Matter
arXiv:hep-ph/9909282 · doi:10.1103/PhysRevD.61.085003
Abstract
Using the non-equilibrium quantum field theory, photon production from the coherently oscillating axion field in a flat Robertson-Walker cosmology is re-examined. First neglecting the Debye screening of the baryon plasma to photons, we find that the axions will dissipate into photons via spinodal instability in addition to parametric resonance. As a result of the pseudo-scalar nature of the axion-photon coupling, we observe a circular polarization asymmetry in the produced photons. However, these effects are suppressed to an insignificant level in the expanding universe. We then briefly discuss a systematic way of including the plasma effect which can further suppress the photon production. We note that the formalism of the problem can be applied to any pseudo-scalar field coupled to photon in a thermal background in a general curved spacetime.
17 pages, RevTex, including 5 ps figures
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Cited by in corpus (16)
- Rotation of Linear Polarization Plane and Circular Polarization from Cosmological Pseudoscalar Fields
- Resonant Amplification of Gauge Fields in Expanding Universe
- Magnetic Helicity Generation from the Cosmic Axion Field
- On the Wondrous Stability of ALP Dark Matter
- How to suppress exponential growth -- on the parametric resonance of photons in an axion background
- Non-equilibrium dynamics of Axion-like particles: the quantum master equation
- Primordial Magnetic Fields from Dark Energy
- Nonequilibrium dynamics of moving mirrors in quantum fields: Influence functional and Langevin equation
- Production of Axions by Cosmic Magnetic Helicity
- Brownian Axion-like particles
- Photon helicity and quantum anomalies in curved spacetimes
- Nonequilibrium Effects and Baryogenesis
- A Note on the Cosmic Evolution of the Axion in a Strong Magnetic Field
- Chern Simons condensate from misaligned axions
- Dynamics of axion-neutral pseudoscalar mixing
- Detecting the -axiverse through parametric resonance