Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-09-08
Phys.Rev. D61 (2000) 085003
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, RevTex, including 5 ps figures
Scientific paper
10.1103/PhysRevD.61.085003
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.
Lee Da-Shin
Ng Kin-Wang
No associations
LandOfFree
Photon Production of Axionic Cold Dark Matter does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Photon Production of Axionic Cold Dark Matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photon Production of Axionic Cold Dark Matter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-89338