Buscar
Mostrando ítems 21-30 de 63
Some remarks on the attractor behaviour in ELKO cosmology
(Iop Publishing Ltd, 2015)
Chameleons on the racetrack
(2014)
Chameleonic inflation
(2013-09-30)
We attempt to incorporate inflation into a string theory realization of the chameleon mechanism. Previously, it was found that the volume modulus, stabilized by the supersymmetric potential used by Kachru, Kallosh, Linde ...
Conformal inflation from the Higgs
(Springer, 2014-06-26)
We modify the conformal inflation set-up of [1], with a local Weyl invariance, a dynamical Planck scale and an SO(1, 1) invariance at high energies, in order to be able to identify the physical scalar with the physical ...
Conformal inflation with chameleon coupling
(2019-04-15)
We investigate the possibility that the inflaton, in particular in conformal inflation models, is also a chameleon, i.e. that it couples to the energy density of some heavy non-relativistic matter present during inflation. ...
Variation in the fine-structure constant and the distance-duality relation
(IOP Publishing, 2020-06)
The possibility of variation of the fundamental constants of nature has been a long-standing question, with important consequences for fundamental physics and cosmology. In particular, it has been shown that variations in ...
Gravitational waves from a very strong electroweak phase transition
(IOP Publishing, 2016-05)
We investigate the production of a stochastic background of gravitational waves in the electroweak phase transition. We consider extensions of the Standard Model which can give very strongly first-order phase transitions, ...
Lower bound on the electroweak wall velocity from hydrodynamic instability
(Iop Publishing, 2015-03)
The subsonic expansion of bubbles in a strongly first-order electroweak phase transition is a convenient scenario for electroweak baryogenesis. For most extensions of the Standard Model, stationary subsonic solutions (i.e., ...
Small field inflation in N = 1 supergravity with a single chiral superfield
(2016-09-01)
We consider “new inflation” inflationary models at small fields, embedded in minimal N = 1 supergravity with a single chiral superfield. Imposing a period of inflation compatible with experiment severely restricts possible ...