CMB spectral distortion constraints on thermal inflation

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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.
Publisher
IOP PUBLISHING LTD
Issue Date
2017-08
Language
English
Article Type
Article
Keywords

MICROWAVE BACKGROUND SPECTRUM; COSMOLOGICAL HYDROGEN RECOMBINATION; PRIMORDIAL MAGNETIC-FIELDS; AFFLECK-DINE BARYOGENESIS; SUPERSTRING MODELS; SYMMETRY-BREAKING; POWER SPECTRUM; ENERGY-SPECTRUM; RELIC PARTICLES; NON-GAUSSIANITY

Citation

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, no.8

ISSN
1475-7516
DOI
10.1088/1475-7516/2017/08/002
URI
http://hdl.handle.net/10203/226304
Appears in Collection
PH-Journal Papers(저널논문)
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