Conveners
Cosmology: Inflation
- Eung Jin Chun (Korea Institute for Advanced Study)
Cosmology
- Eung Jin Chun (Korea Institute for Advanced Study)
Prof.
Hyun Min Lee
(Chung-Ang University)
29/05/2014, 14:30
Cosmology and Astroparticles
Parallel Session talk
We propose a general chaotic inflation model with non-canonical kinetic term.
The form of the potential is fixed due to the requirement that the inflation model is a quadratic form in the large field values of the inflaton. We show that a large coupling in the non-canonical kinetic term allows for the slow-roll inflation with sub-Planckian field values of the inflaton and the successful...
Kristjan Kannike
(Nat. Inst. of Chem.Phys. & Biophys. (EE))
29/05/2014, 14:50
Cosmology and Astroparticles
Parallel Session talk
We consider a classically scale invariant model of scalar field inflation. The treel level potential contains only quartic terms and the scale of inflation is generated dynamically. Both hilltop and chaotic inflation are possible. The model can explain the BICEP2 signal of tensor modes. Reheating takes place via decay into right handed neutrinos.
Dr
Kohei Kamada
(Ecole Polytechnique Federale de Lausanne)
29/05/2014, 15:10
Cosmology and Astroparticles
Parallel Session talk
Starobinsky's R^2 inflation is still one of the most atractive inflation models. However, once we consider its supersymmetric version, we have no reason not to consider its higher order corrections, which would destroy the slow-roll evolution of the Universe and successful inflation and make the initial condition tuning severe. Here I show the constraint on the higher order correction to the...
Mr
Clemens Wieck
(DESY Hamburg)
29/05/2014, 15:30
Cosmology and Astroparticles
Parallel Session talk
We analyze the corrections to various F-term inflation models induced by a supersymmetrically stabilized Kähler modulus. We present general expressions for both small-field and large-field (chaotic) inflation models. Furthermore, we investigate the implications and constraints of supersymmetry breaking after inflation.
Mar Bastero Gil
(U)
29/05/2014, 15:50
Cosmology and Astroparticles
Parallel Session talk
We propose a novel mechanism for the incomplete decay of the inflaton
field that, while reheating the universe after inflation, leaves a
stable oscillating scalar condensate that can account for the observed
dark matter abundance. We discuss possible embeddings of this
mechanism within different inflationary models, in particular chaotic
and hybrid inflation, as well as within extensions...
Jinn-Ouk Gong
(A)
29/05/2014, 16:40
Cosmology and Astroparticles
Parallel Session talk
We describe an extended class of the conformally invariant theories which takes T-model as well as Starobinsky model as special cases. We derive a general relation between the two slow-roll parameters, and find that a large class of models can be embedded. Such models include more general Starobinsky-like inflation as well as the chaotic inflation model with a large tensor-to-scalar ratio...
Glauber Carvalho Dorsch
(University of Sussex)
29/05/2014, 17:00
Cosmology and Astroparticles
Parallel Session talk
Quantum scale invariance in the UV has recently attracted renewed interest as a solution to the hierarchy problem arising in the Standard Model (SM). In this work we explore the cosmological signatures at the electroweak scale of models where scale invariance is broken in a "hidden" sector coupling to the SM via gauge interactions only. We find that these models may naturally give rise to a...
Dr
Seishi Enomoto
(Faculty of Physics, University of Warsaw)
29/05/2014, 17:20
Cosmology and Astroparticles
Parallel Session talk
It is known that time-varying masses cause particle production. We shall discuss particle production of interacting bosons and fermions in the context of supersymmetric models. In such models both bosonic and fermionic particles are produced, since their masses are controlled by the same background scalar fields. We shall focus on the resulting abundance of fermions, taking into account ...
Nicolas Viaux
(Pontificia Universidad Católica de Chile)
29/05/2014, 17:40
Cosmology and Astroparticles
Parallel Session talk
Stellar evolution is quite sensitive to the inclusion of new low-mass particles (such as axions or neutrinos with novel electromagnetic properties) which have weak interactions with matter. Such particles escape almost freely without having interactions with matter, implying changes in the evolution and properties of the star by achieving a new energy loss channel. These changes produced by...
