Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 7, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2011/07/035
Keywords
primordial black holes; inflation; cosmological phase transitions; cosmological perturbation theory
Funding
- EU [MRTN-CT-2006-035863, UNILHC23792]
- European Research and Training Network (RTN)
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A contribution zeta(chi) to the curvature perturbation will be generated during the waterfall that ends hybrid inflation, that may be significant on small scales. In particular, it may lead to excessive black hole formation. We here consider standard hybrid inflation, where the tachyonic mass of the waterfall field is much bigger than the Hubble parameter. We calculate zeta(chi) in the simplest case, and see why earlier calculations of zeta(chi) are incorrect.
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