Mimicking features in alternatives to inflation with interacting spectator fields

Guillem Domènech; Javier Rubio; Julius Wons

doi:10.1016/j.physletb.2019.01.039

Mimicking features in alternatives to inflation with interacting spectator fields

Guillem Domènech
, Javier Rubio
, Julius Wons^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Research › peer review

Abstract

It has been argued that oscillatory features from spectator fields in the primordial power spectrum could be a probe of alternatives to inflation. In this work, we soften this claim by showing that the frequency and amplitude dependence of the patterns appearing in these scenarios could be mimicked by field interactions during inflation. The degeneracy of the frequency holds for the n-point correlation functions, while the degeneracy of the amplitude is broken at the level of non-gaussianities.

Original language	English
Pages (from-to)	263-269
Number of pages	7
Journal	Physics Letters: B
Volume	790
E-pub ahead of print	23 Jan 2019
DOIs	https://doi.org/10.1016/j.physletb.2019.01.039
Publication status	Published - 10 Mar 2019
Externally published	Yes

Keywords

Alternatives to inflation
Early universe
Inflation
Primordial features
Primordial standard clocks

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/j.physletb.2019.01.039Licence: CC BY 4.0

Cite this

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title = "Mimicking features in alternatives to inflation with interacting spectator fields",

abstract = "It has been argued that oscillatory features from spectator fields in the primordial power spectrum could be a probe of alternatives to inflation. In this work, we soften this claim by showing that the frequency and amplitude dependence of the patterns appearing in these scenarios could be mimicked by field interactions during inflation. The degeneracy of the frequency holds for the n-point correlation functions, while the degeneracy of the amplitude is broken at the level of non-gaussianities.",

keywords = "Alternatives to inflation, Early universe, Inflation, Primordial features, Primordial standard clocks",

author = "Guillem Dom{\`e}nech and Javier Rubio and Julius Wons",

note = "Funding Information: G.D. would like to thank R. Namba, M. Sasaki and S. Zhou for useful discussions. G.D. would also like to thank X. Chen for suggesting the term “non-standard clock”. G.D. was partially supported by DFG Collaborative Research center SFB 1225 (ISOQUANT). J.R. acknowledges support from the DFG through the project TRR33 “The Dark Universe” during the first stages of this work. ",

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doi = "10.1016/j.physletb.2019.01.039",

language = "English",

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AU - Domènech, Guillem

AU - Rubio, Javier

AU - Wons, Julius

N1 - Funding Information: G.D. would like to thank R. Namba, M. Sasaki and S. Zhou for useful discussions. G.D. would also like to thank X. Chen for suggesting the term “non-standard clock”. G.D. was partially supported by DFG Collaborative Research center SFB 1225 (ISOQUANT). J.R. acknowledges support from the DFG through the project TRR33 “The Dark Universe” during the first stages of this work.

PY - 2019/3/10

Y1 - 2019/3/10

N2 - It has been argued that oscillatory features from spectator fields in the primordial power spectrum could be a probe of alternatives to inflation. In this work, we soften this claim by showing that the frequency and amplitude dependence of the patterns appearing in these scenarios could be mimicked by field interactions during inflation. The degeneracy of the frequency holds for the n-point correlation functions, while the degeneracy of the amplitude is broken at the level of non-gaussianities.

AB - It has been argued that oscillatory features from spectator fields in the primordial power spectrum could be a probe of alternatives to inflation. In this work, we soften this claim by showing that the frequency and amplitude dependence of the patterns appearing in these scenarios could be mimicked by field interactions during inflation. The degeneracy of the frequency holds for the n-point correlation functions, while the degeneracy of the amplitude is broken at the level of non-gaussianities.

KW - Alternatives to inflation

KW - Early universe

KW - Inflation

KW - Primordial features

KW - Primordial standard clocks

UR - https://www.scopus.com/pages/publications/85060495815

U2 - 10.1016/j.physletb.2019.01.039

DO - 10.1016/j.physletb.2019.01.039

M3 - Article

SN - 0370-2693

VL - 790

SP - 263

EP - 269

JO - Physics Letters: B

JF - Physics Letters: B

ER -

Mimicking features in alternatives to inflation with interacting spectator fields

Abstract

Keywords

ASJC Scopus subject areas

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