Thermal Inflation and the Gravitational Wave Background

Details Thermal Inflation and the Gravitational Wave Background Thermal Inflation and the Gravitational Wave Background

2008-01-28

arxiv.org/abs/0801.4197v3

JCAP 0805:013,2008

Astronomy and Astrophysics

Astrophysics

21 pages, 4 figures; accepted for JCAP; a reference added; table reformatted

Scientific paper

10.1088/1475-7516/2008/05/013

We consider the impact of thermal inflation -- a short, secondary period of inflation that can arise in supersymmetric scenarios -- on the stochastic gravitational wave background. We show that while the primordial inflationary gravitational wave background is essentially unchanged at CMB scales, it is massively diluted at solar system scales and would be unobservable by a BBO style experiment. Conversely, bubble collisions at the end of thermal inflation can generate a new stochastic background. We calculate the likely properties of the bubbles created during this phase transition, and show that the expected amplitude and frequency of this signal would fall within the BBO range.

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