Results 41 to 50 of about 20,263 (249)
Inflationary Universe from Anomaly‐Free F(R)‐Gravity
Advances in High Energy Physics, Volume 2022, Issue 1, 2022., 2022 By adding a three‐dimensional manifold to an eleven‐dimensional manifold in supergravity, we obtain the action of F(R)‐gravity and find that it is anomaly‐free. We calculate the scale factor of the inflationary universe in this model and observe that it is related to the slow‐roll parameters.
Aroonkumar Beesham +2 more
wiley +1 more source
Measuring inflaton couplings via primordial gravitational waves
Journal of High Energy Physics, 2023 We investigate the reach of future gravitational wave (GW) detectors in probing inflaton couplings with visible sector particles that can either be bosonic or fermionic in nature.
Basabendu Barman +3 more
doaj +1 more source
Leptogenesis in inflaton decay [PDF]
Physics Letters B, 1999 We study a leptogenesis via decays of heavy Majorana neutrinos produced non-thermally in inflaton decays. We find that this scenario is fully consistent with existing supersymmetric inflation models such as for topological or for hybrid inflation and the Froggatt-Nielsen mechanism generating hierarchies in quark and lepton mass matrices.
Asaka, T. +3 more
openaire +2 more sources
Hidden inflaton dark matter [PDF]
Journal of Cosmology and Astroparticle Physics, 2019 36 pages, 11 figures. v2: Two appendices, discussion, and references added.
Almeida, Juan P. Beltrán +3 more
openaire +2 more sources
Inflaton particles in reheating [PDF]
Physics Letters B, 2000 14 pages, 4 figures;code corrected,figures and some conclusions ...
Henriques, A. B., Moorhouse, R. G.
openaire +2 more sources
Inflation without inflaton(s) [PDF]
Journal of Cosmology and Astroparticle Physics, 2007 We propose a model for early universe cosmology without the need for fundamental scalar fields. Cosmic acceleration and phenomenologically viable reheating of the universe results from a series of energy transitions, where during each transition vacuum energy is converted to thermal radiation.
Watson, Scott +3 more
openaire +3 more sources
Pseudo-Nambu-Goldstone inflation with twin waterfalls
Physics Letters B, 2022 We propose a pseudo-Nambu-Goldstone inflation where twin waterfall fields coupled to the inflaton are responsible for the graceful exit from inflation by a waterfall transition.
Hyun Min Lee, Adriana G. Menkara
doaj +1 more source
Physical Review D, 2022 We study the possibility that, after inflation, the inflaton reaches thermal equilibrium with the Standard Model thermal bath and eventually freezes-out in the non-relativistic regime. When the inflaton decay is the sole source of (non-thermal) dark matter, its relic density is automatically suppressed.
Oleg Lebedev +3 more
openaire +3 more sources
Inflection-point inflation and dark matter redux
Journal of High Energy Physics, 2022 We investigate for viable models of inflation that can successfully produce dark matter (DM) from inflaton decay process, satisfying all the constraints from Cosmic Microwave Background (CMB) and from some other observations.
Anish Ghoshal +4 more
doaj +1 more source
Towards a reliable effective field theory of inflation
Physics Letters B, 2021 We present the first quantum field theory model of inflation that is renormalizable in the matter sector, with a super-Hubble inflaton mass and sub-Planckian field excursions, which is thus technically natural and consistent with a high-energy completion
Mar Bastero-Gil +3 more
doaj +1 more source