Results 11 to 20 of about 19,573 (204)

When Does the Inflaton Decay? [PDF]

Journal of Cosmology and Astroparticle Physics, 2017
In order for the inflaton to decay into radiation at the end of inflation, it needs to couple to light matter fields. In this article we determine whether such couplings cause the inflaton to decay during inflation rather than after it.
Armendariz-Picon, C.
core   +2 more sources

Gravitino problem in inflation driven by inflaton-polonyi Kähler coupling

Physics Letters B, 2018
We discuss the cosmological gravitino problem in inflation models in which the inflaton potential is constructed from Kähler potential rather than superpotential: a representative model is D3‾-induced geometric inflation.
Fuminori Hasegawa, Kazunori Nakayama, Takahiro Terada, Yusuke Yamada   +3 more
doaj   +4 more sources

The Giant Inflaton [PDF]

Journal of High Energy Physics, 2004
We investigate a new mechanism for realizing slow roll inflation in string theory, based on the dynamics of p anti-D3 branes in a class of mildly warped flux compactifications.
A. Buchel, A. Buchel, A. Lawrence, A. Saltman, A.D. Linde, A.H. Guth, A.R. Frey, C. Escoda, C.P. Burgess, C.P. Burgess, C.P. Burgess ., C01-07-20.4 collaboration, D.P. Jatkar, E. Silverstein, for related work see M. Grana, G.R. Dvali, Herman Verlinde, I.R. Klebanov, J. Polchinski, J.P. Hsu, K. Dasgupta, L. Pilo, M.R. Garousi, O. DeWolfe, Oliver DeWolfe, P.G. Camara, R. Brustein, R.C. Myers, S. Kachru, S. Kachru, S. Kachru ., Shamit Kachru   +31 more
core   +5 more sources

ν-inflaton dark matter [PDF]

Journal of High Energy Physics, 2019
We present a unified model where the same scalar field can drive inflation and account for the present dark matter abundance. This scenario is based on the incomplete decay of the inflaton field into right-handed neutrino pairs, which is accomplished by ...
António Torres Manso, João G. Rosa
doaj   +4 more sources

Non-Gaussianity from Particle Production during Inflation [PDF]

Advances in Astronomy, 2010
In a variety of models the motion of the inflaton may trigger the production of some non-inflaton particles during inflation, for example via parametric resonance or a phase transition.
Neil Barnaby
doaj   +4 more sources

Observational constraints on the inflaton potential combined with flow-equations in inflaton space [PDF]

Monthly Notices of the Royal Astronomical Society, 2002
Direct observations provide constraints on the first two derivatives of the inflaton potential in slow roll models. We discuss how present day observations, combined with the flow equations in slow roll parameter space, provide a non-trivial constraint ...
Hansen, Steen H., Kunz, Martin
core   +5 more sources

Spontaneous baryogenesis from asymmetric inflaton

Physics Letters B, 2016
We propose a variant scenario of spontaneous baryogenesis from asymmetric inflaton based on current–current interactions between the inflaton and matter fields with a non-zero B−L charge.
Fuminobu Takahashi, Masaki Yamada
doaj   +6 more sources

Higgs–inflaton mixing and vacuum stability

Physics Letters B, 2019
The quartic and trilinear Higgs field couplings to an additional real scalar are renormalizable, gauge and Lorentz invariant. Thus, on general grounds, one expects such couplings between the Higgs and an inflaton in quantum field theory. We find that the
Yohei Ema, Mindaugas Karčiauskas, Oleg Lebedev, Stanislav Rusak, Marco Zatta   +4 more
doaj   +5 more sources

Inflation without an inflaton

Physical Review Research
We propose a novel scenario in which scalar perturbations, which seed the large-scale structure of the universe, are generated without relying on a scalar field (the inflaton).
Daniele Bertacca, Raul Jimenez, Sabino Matarrese, Angelo Ricciardone   +3 more
doaj   +4 more sources

Baryogenesis from the inflaton field

Physics Letters B, 2014
In this letter we show that the inflaton can generate the cosmological baryon asymmetry. We take the inflaton to be a complex scalar field with a weakly broken global symmetry and develop a new variant on the Affleck–Dine mechanism.
Mark P. Hertzberg, Johanna Karouby
doaj   +5 more sources