Report/Journal Article

PUBDB-2017-13763

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Drifting oscillations in axion monodromy

Flauger, R. (Corresponding author) ; McAllister, L. ; Silverstein, E. ; Westphal, A.DESY*

2017
IOP London

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Please use a persistent id in citations: doi:10.1088/1475-7516/2017/10/055  doi:10.3204/PUBDB-2017-13763

Report No.: DESY-14-225; SLAC-PUB-16165; SU/ITP-14/29; arXiv:1412.1814

Abstract: We study the pattern of oscillations in the primordial power spectrum in axion monodromy inflation, accounting for drifts in the oscillation period that can be important for comparing to cosmological data. In these models the potential energy has a monomial form over a super-Planckian field range, with superimposed modulations whose size is model-dependent. The amplitude and frequency of the modulations are set by the expectation values of moduli fields. We show that during the course of inflation, the diminishing energy density can induce slow adjustments of the moduli, changing the modulations. We provide templates capturing the effects of drifting moduli, as well as drifts arising in effective field theory models based on softly broken discrete shift symmetries, and we estimate the precision required to detect a drifting period. A non-drifting template suffices over a wide range of parameters, but for the highest frequencies of interest, or for sufficiently strong drift, it is necessary to include parameters characterizing the change in frequency over the e-folds visible in the CMB. We use these templates to perform a preliminary search for drifting oscillations in a part of the parameter space in the Planck nominal mission data.

Note: (c) IOP Publishing Ltd and Sissa Medialab ; Post referee fulltext in progress; Embargo 12 months from publication

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)
2. 514 - Theoretical Particle Physics (POF2-514) (POF2-514)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2017

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Internal Report Flauger, R. (Corresponding Author) ; McAllister, L. ; Silverstein, E. ; Westphal, A.DESY*
Drifting Oscillations in Axion Monodromy
Red Report 48 pp. (2014)2014     Files  Fulltext Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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