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000193123 0247_ $$2arXiv$$aarXiv:1412.1814
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000193123 0881_ $$aSU/ITP-14/29; SLAC-PUB-16165; DESY-14-225; arXiv:1412.1814
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000193123 088__ $$2arXiv$$aarXiv:1412.1814
000193123 1001_ $$0P:(DE-HGF)0$$aFlauger, Raphael$$b0$$eCorresponding Author
000193123 245__ $$aDrifting Oscillations in Axion Monodromy
000193123 260__ $$c2014
000193123 300__ $$a48
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000193123 520__ $$aWe study the pattern of oscillations in the primordial power spectrum in axion monodromy inflation, accounting for drifts in the oscillation period that can be important for comparing to cosmological data. In these models the potential energy has a monomial form over a super-Planckian field range, with superimposed modulations whose size is model-dependent. The amplitude and frequency of the modulations are set by the expectation values of moduli fields. We show that during the course of inflation, the diminishing energy density can induce slow adjustments of the moduli, changing the modulations. We provide templates capturing the effects of drifting moduli, as well as drifts arising in effective field theory models based on softly broken discrete shift symmetries, and we estimate the precision required to detect a drifting period. A non-drifting template suffices over a wide range of parameters, but for the highest frequencies of interest, or for sufficiently strong drift, it is necessary to include parameters characterizing the change in frequency over the e-folds visible in the CMB. We use these templates to perform a preliminary search for drifting oscillations in a part of the parameter space in the Planck nominal mission data.
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000193123 650_7 $$2INSPIRE$$amodulation: frequency
000193123 650_7 $$2INSPIRE$$apower spectrum: primordial
000193123 650_7 $$2INSPIRE$$apotential: energy
000193123 650_7 $$2INSPIRE$$aoscillation
000193123 650_7 $$2INSPIRE$$amoduli
000193123 650_7 $$2INSPIRE$$ainflation
000193123 650_7 $$2INSPIRE$$amonodromy
000193123 650_7 $$2INSPIRE$$aaxion
000193123 650_7 $$2INSPIRE$$acosmic background radiation
000193123 650_7 $$2INSPIRE$$aeffective field theory
000193123 693__ $$0EXP:(DE-MLZ)NOSPEC-20140101$$5EXP:(DE-MLZ)NOSPEC-20140101$$eNo specific instrument$$x0
000193123 7001_ $$0P:(DE-HGF)0$$aMcAllister, Liam$$b1
000193123 7001_ $$0P:(DE-HGF)0$$aSilverstein, Eva$$b2
000193123 7001_ $$0P:(DE-H253)PIP1013212$$aWestphal, Alexander$$b3$$udesy
000193123 773__ $$y2014
000193123 8564_ $$uhttp://arxiv.org/abs/arXiv:1412.1814
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000193123 9132_ $$0G:(DE-HGF)POF3-611$$1G:(DE-HGF)POF3-610$$2G:(DE-HGF)POF3-600$$aDE-HGF$$bForschungsbereich Materie$$lMaterie und Universum$$vFundamental Particles and Forces $$x0
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000193123 9141_ $$y2014
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