Chiral anomaly, Schwinger effect, Euler-Heisenberg Lagrangian and application to axion inflation
Sign Up to like & getrecommendations! Published in 2020 at "Journal of High Energy Physics"
DOI: 10.1007/jhep02(2020)055
Abstract: Particle production in strong electromagnetic fields is a recurring theme in solid state physics, heavy ion collisions, early universe cosmology and formal quantum field theory. In this paper we discuss the Dirac equation in a… read more here.
Keywords: physics; axion inflation; production; chiral anomaly ... See more keywords
Warming up cold inflation
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/11/011
Abstract: The axion is a well-motivated candidate for the inflaton, as the radiative corrections that spoil many single-field models are avoided by virtue of its shift symmetry. However, axions generically couple to gauge sectors. As the… read more here.
Keywords: warming cold; axion inflation; inflation; thermal bath ... See more keywords
Parity-odd and even trispectrum from axion inflation
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2023/05/018
Abstract: The four-point correlation function of primordial scalar perturbations has parity-even and parity-odd contributions and the parity-odd signal in cosmological observations is opening a novel window to look for new physics in the inflationary epoch. We… read more here.
Keywords: odd even; vector field; axion inflation; parity ... See more keywords
Constraining axion inflation with gravitational waves from preheating
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.101.083534
Abstract: We study gravitational wave production from gauge preheating in a variety of inflationary models, detailing its dependence on both the energy scale and the shape of the potential. We show that preheating into Abelian gauge… read more here.
Keywords: inflation gravitational; constraining axion; mathrm eff; gravitational wave ... See more keywords
Hypermagnetogenesis from axion inflation: Model-independent estimates
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DOI: 10.1103/physrevd.105.043530
Abstract: E.V. Gorbar, 2 K. Schmitz, ∗ O.O. Sobol, 1, † and S.I. Vilchinskii 5 Physics Faculty, Taras Shevchenko National University of Kyiv, 64/13, Volodymyrska Str., 01601 Kyiv, Ukraine Bogolyubov Institute for Theoretical Physics, 14-b, Metrologichna… read more here.
Keywords: physics; axion inflation; inflation model; hypermagnetogenesis axion ... See more keywords
V-mode polarization in axion inflation and preheating
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DOI: 10.1103/physrevd.96.063506
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… read more here.
Keywords: polarization axion; mode polarization; axion inflation;
Constraining Axion Inflation with Gravitational Waves across 29 Decades in Frequency.
Sign Up to like & getrecommendations! Published in 2020 at "Physical review letters"
DOI: 10.1103/physrevlett.124.171301
Abstract: We demonstrate that gravitational waves generated by efficient gauge preheating after axion inflation generically contribute significantly to the effective number of relativistic degrees of freedom N_{eff}. We show that, with existing Planck limits, gravitational waves… read more here.
Keywords: axion inflation; gravitational waves; gauge preheating;