Built on

L. Parker, Particle creation in expanding universes , Phys. Rev. Lett. 21
1968
Earlier work this paper cites.
A. H. Guth, The Inflationary Universe: A Possible Solution to the Horizon and Flatness Problems , Phys. Rev. D23
1981
Earlier work this paper cites.
A. D. Linde, Particle physics and inflationary cosmology , Contemp. Concepts Phys. 5
1990
Earlier work this paper cites.
K. Freese, J. A. Frieman and A. V. Olinto, Natural inflation with pseudo - Nambu-Goldstone bosons , Phys. Rev. Lett. 65
1990
Earlier work this paper cites.
W. D. Garretson, G. B. Field and S. M. Carroll, Primordial magnetic fields from pseudoGoldstone bosons , Phys. Rev. D46
1992
Earlier work this paper cites.
V. Kuzmin and I. Tkachev, Matter creation via vacuum fluctuations in the early universe and observed ultrahigh-energy cosmic ray events , Phys. Rev. D59
1999
Earlier work this paper cites.
S. Weinberg, Quantum contributions to cosmological correlations , Phys. Rev. D72
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Earlier work this paper cites.
M. M. Anber and L. Sorbo, N-flationary magnetic fields , JCAP 0610
2006
Earlier work this paper cites.
E. Silverstein and A. Westphal, Monodromy in the CMB: Gravity Waves and String Inflation , Phys. Rev. D78
Original
2008
Earlier work this paper cites.
R. Durrer, G. Marozzi and M. Rinaldi, On Adiabatic Renormalization of Inflationary Perturbations , Phys. Rev. D80
Original
2009
Earlier work this paper cites.
L. McAllister, E. Silverstein and A. Westphal, Gravity Waves and Linear Inflation from Axion Monodromy , Phys. Rev. D82
Original
2010
Earlier work this paper cites.
M. M. Anber and L. Sorbo, Naturally inflating on steep potentials through electromagnetic dissipation , Phys. Rev. D81
Original
2010
Earlier work this paper cites.
N. Barnaby and M. Peloso, Large Nongaussianity in Axion Inflation , Phys. Rev. Lett. 106
Original
2011
Earlier work this paper cites.

Similar

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Then

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Original
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Later among the works it cites.
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Original
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Later among the works it cites.
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Later among the works it cites.
BICEP2, Keck Array

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2018

Phenomenology of fermion production during axion inflation

Adshead, Peter, Pearce, Lauren, Peloso, Marco et al.

Understand

We study the production of fermions through a derivative coupling with a pseudoscalar inflaton and the effects of the produced fermions on the scalar primordial perturbations.

We present analytic results for the modification of the scalar power spectrum due to the produced fermions, and we estimate the amplitude of the non-Gaussianities in the equilateral regime.
Remarkably, we find a regime where the effect of the fermions gives the dominant contribution to the scalar spectrum while the amplitude of the bispectrum is small and in agreement with observation.
We also note the existence of a regime in which the backreaction of the fermions on the evolution of the zero-mode of the inflaton can lead to inflation even if the potential of the inflaton is steep and does not satisfy the slow-roll conditions.

Built on

L. Parker, Particle creation in expanding universes , Phys. Rev. Lett. 21
1968
Earlier work this paper cites.
A. H. Guth, The Inflationary Universe: A Possible Solution to the Horizon and Flatness Problems , Phys. Rev. D23
1981
Earlier work this paper cites.
A. D. Linde, Particle physics and inflationary cosmology , Contemp. Concepts Phys. 5
1990
Earlier work this paper cites.
K. Freese, J. A. Frieman and A. V. Olinto, Natural inflation with pseudo - Nambu-Goldstone bosons , Phys. Rev. Lett. 65
1990
Earlier work this paper cites.
W. D. Garretson, G. B. Field and S. M. Carroll, Primordial magnetic fields from pseudoGoldstone bosons , Phys. Rev. D46
1992
Earlier work this paper cites.
V. Kuzmin and I. Tkachev, Matter creation via vacuum fluctuations in the early universe and observed ultrahigh-energy cosmic ray events , Phys. Rev. D59
1999
Earlier work this paper cites.
S. Weinberg, Quantum contributions to cosmological correlations , Phys. Rev. D72
2005
Earlier work this paper cites.
M. M. Anber and L. Sorbo, N-flationary magnetic fields , JCAP 0610
2006
Earlier work this paper cites.
E. Silverstein and A. Westphal, Monodromy in the CMB: Gravity Waves and String Inflation , Phys. Rev. D78
Original
2008
Earlier work this paper cites.
R. Durrer, G. Marozzi and M. Rinaldi, On Adiabatic Renormalization of Inflationary Perturbations , Phys. Rev. D80
Original
2009
Earlier work this paper cites.
L. McAllister, E. Silverstein and A. Westphal, Gravity Waves and Linear Inflation from Axion Monodromy , Phys. Rev. D82
Original
2010
Earlier work this paper cites.
M. M. Anber and L. Sorbo, Naturally inflating on steep potentials through electromagnetic dissipation , Phys. Rev. D81
Original
2010
Earlier work this paper cites.
N. Barnaby and M. Peloso, Large Nongaussianity in Axion Inflation , Phys. Rev. Lett. 106
Original
2011
Earlier work this paper cites.