V-mode polarization in axion inflation and preheating

V-mode polarization in axion inflation and preheating

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 nV=4. This is independent of the dominant deca...

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Veröffentlicht in:Physical review. D 2017-09, Vol.96 (6), Article 063506
Hauptverfasser: Alexander, Stephon, McDonough, Evan, Sims, Robert
Format: Artikel
Sprache:eng
Schlagworte:
Fermions
Heating
Polarization
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Zusammenfassung: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 nV=4. This is independent of the dominant decay channel of the inflaton (direct fermion vs direct photon production).
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.96.063506