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| Journal Article | PUBDB-2014-04243 |
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2014
IOP
London
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Please use a persistent id in citations: doi:10.1088/1475-7516/2014/11/006
Report No.: DESY-14-099; IPMU 14-0150; SISSA 39/2014/FISI; arXiv:1406.6300
Abstract: We consider D-term inflation for small couplings of the inflaton to matter fields. Standard hybrid inflation then ends at a critical value of the inflaton field that exceeds the Planck mass. During the subsequent waterfall transition the inflaton continues its slow-roll motion, whereas the waterfall field rapidly grows by quantum fluctuations. Beyond the decoherence time, the waterfall field becomes classical and approaches a time-dependent minimum, which is determined by the value of the inflaton field and the self-interaction of the waterfall field. During the final stage of inflation, the effective inflaton potential is essentially quadratic, which leads to the standard predictions of chaotic inflation. The model illustrates how the decay of a false vacuum of GUT-scale energy density can end in a period of `chaotic inflation'.
Keyword(s): inflation: D-term ; inflation: chaos ; inflaton: potential ; inflaton: coupling ; inflation: hybrid ; fluctuation: quantum ; false vacuum: decay ; decoherence: time ; energy: density ; scale: Planck ; slow-roll approximation ; time dependence
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The Chaotic Regime of D-Term Inflation
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