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^*

^*Korrespondierende*r Autor*in für diese Arbeit

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › 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.

Originalsprache	Englisch
Seiten (von - bis)	263-269
Seitenumfang	7
Fachzeitschrift	Physics Letters: B
Jahrgang	790
Elektronisch veröffentlicht (E-Pub)	23 Jan. 2019
DOIs	https://doi.org/10.1016/j.physletb.2019.01.039
Publikationsstatus	Veröffentlicht - 10 März 2019
Extern publiziert	Ja

ASJC Scopus Sachgebiete

Kern- und Hochenergiephysik

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

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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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AU - Rubio, Javier

AU - Wons, Julius

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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

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DO - 10.1016/j.physletb.2019.01.039

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JO - Physics Letters: B

JF - Physics Letters: B

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