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6 papers · 2 filters
Contribution of the hybrid inflation waterfall to the primordial curvature perturbation
David H. Lyth
A contribution 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…
The quantum origin of cosmic structure: theory and observations
Konstantinos Dimopoulos
The particle production process is reviewed, through which cosmic inflation can produce a scale invariant superhorizon spectrum of perturbations of suitable fields starting from th…
On the health of a vector field with (R A^2)/6 coupling to gravity
Mindaugas Karčiauskas, David Lyth
The coupling (R A^2)/6 of a vector field to gravity was proposed as a mechanism for generating a primordial magnetic field, and more recently as a mechanism for generating a statis…
The TeV-mass curvaton
Kari Enqvist, Anupam Mazumdar, Olli Taanila
We consider the constraints for a curvaton with mass m ~ 1 TeV and show that they are not consistent with a purely quadratic potential. Even if the curvaton self-interactions were…
Issues concerning the waterfall of hybrid inflation
David H. Lyth
We discuss the waterfall that ends hybrid inflation. Making some simplifying assumptions, that may be satisfied by GUT inflation models, two issues are addressed. First, the proced…
Fast Electroweak Symmetry Breaking and Cold Electroweak Baryogenesis
Kari Enqvist, Philip Stephens, Olli Taanila +1
We construct a model for delayed electroweak symmetry breaking that takes place in a cold Universe with T<<100 GeV and which proceeds by a fast quench rather than by a conventional…