V-mode Polarization in Axion Inflation and Preheating

Stephon Alexander; Evan McDonough; Robert Sims

doi:10.1103/PhysRevD.96.063506

V-mode Polarization in Axion Inflation and Preheating

General Relativity and Quantum Cosmology 2017-09-20 v3 Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology High Energy Physics - Theory

Authors: Stephon Alexander , Evan McDonough , Robert Sims

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Abstract

We study the production of primordial circular ("V-mode") polarization in axion inflation coupled to fermions and gauge fields, with special attention paid to (p)reheating. We construct the power spectrum of $V$ , and find a blue-tilted spectrum with index $n_V=4$ . This is independent of the dominant decay channel of the inflaton (direct fermion vs. direct photon production)

Keywords

axion inflation preheating V-mode polarization primordial circular polarization power spectrum gauge fields

Cite

@article{arxiv.1704.00838,
  title  = {V-mode Polarization in Axion Inflation and Preheating},
  author = {Stephon Alexander and Evan McDonough and Robert Sims},
  journal= {arXiv preprint arXiv:1704.00838},
  year   = {2017}
}

Comments

17 pages. v2: typos corrected, references added. v3: added review section on circular polarization (section II), references added. Matches version to appear in Phys. Rev. D

V-mode Polarization in Axion Inflation and Preheating

Abstract

Keywords

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