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CMB spectral distortion constraints on thermal inflation

Title
CMB spectral distortion constraints on thermal inflation
Authors
Cho, KihyunHong, Sungwook E.Stewart, Ewan D.Zoe, Heeseung
DGIST Authors
Zoe, Heeseung
Issue Date
2017-08
Citation
Journal of Cosmology and Astroparticle Physics(8)
Type
Article
Article Type
Article
Keywords
CMBR TheoryCosmological Hydrogen RecombinationCosmological Parameters from CMBREnergy SpectrumMicrowave Background SpectrumNon GaussianityPhysics of the Early UniversePower SpectrumPrimordial Magnetic FieldsRelic ParticlesSuperstring ModelsSymmetry Breaking
ISSN
1475-7516
Abstract
Thermal inflation is a second epoch of exponential expansion at typical energy scales V-1/4 similar to 10(6 similar to 8) GeV. If the usual primordial inflation is followed by thermal inflation, the primordial power spectrum is only modestly redshifted on large scales, but strongly suppressed on scales smaller than the horizon size at the beginning of thermal inflation, k > k(b) = a(b)H(b). We calculate the spectral distortion of the cosmic microwave background generated by the dissipation of acoustic waves in this context. For k(b) << 10(3) Mpc(-1), thermal inflation results in a large suppression of the mu-distortion amplitude, predicting that it falls well below the standard value of mu similar or equal to 2 x 10(-8). Thus, future spectral distortion experiments, similar to PIXIE, can place new limits on the thermal inflation scenario, constraining k(b) greater than or similar to 10(3) Mpc(-1) if mu similar or equal to 2 x 10(-8) were found.
URI
http://hdl.handle.net/20.500.11750/4545
DOI
10.1088/1475-7516/2017/08/002
Publisher
IOP PUBLISHING LTD
Files:
There are no files associated with this item.
Collection:
School of Undergraduate Studies1. Journal Articles


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