Conveners
Parallel Sessions: Cosmology & Astroparticle Physics - Inflation
- Sebastien Clesse
- Bjoern Garbrecht
Dr
Marco Drewes
(Université catholique de Louvain)
28/09/2017, 14:00
Cosmology & Astroparticle Physics
We show that the parameter space of single field models of inflation contains viable regions in which the inflaton couplings to radiation can be determined from the properties of CMB temperature fluctuations, in particular the spectral index. This may be the only way to measure these fundamental microphysical parameters, which shaped the universe by setting the initial temperature of the hot...
Dr
Jonathan Frazer
(DESY)
28/09/2017, 14:17
Cosmology & Astroparticle Physics
Incorporating stochastic methods into the model building process can significantly improve our understanding of how to reliably compute predictions. In addition, as high energy physics models of inflation continue to improve, it is expected that they will become increasingly complex. This again makes the use of stochastic methods an appealing option, as they present a wealth of new tools for...
Mafalda Dias
(DESY)
28/09/2017, 14:34
Cosmology & Astroparticle Physics
An ultraviolet-complete description of inflation may not be simple. Indeed, our best paradigm for physics at high energies seems to point towards a low-energy effective potentials with a large number of degrees of freedom. Cosmological data however shows a very simple primordial distribution of matter. I will discuss how complex inflation can give rise to universal simple predictions by...
Dr
Mindaugas Karčiauskas
(University of Jyväskylä)
28/09/2017, 14:51
Cosmology & Astroparticle Physics
Currently favoured values of the Standard Model parameters show that the model can be consistently extended all the way up to the Planck scale. The only required new physics at high energies being inflation. However, those values also indicate that at high energies the SM potential might have another, much deeper negative minimum. We show, that apparent negative states do not exclude high...
Marco Zatta
(University of Helsinki)
28/09/2017, 15:08
Cosmology & Astroparticle Physics
Current measurements of the Higgs boson and top quark mass favor metastability of the electroweak vacuum in the Standard Model. This raises some questions when we consider the evolution of our universe: how the Higgs ended up in such an energetically disfavored state? Why it remained there during inflation? These problems can be addressed by assuming that the Higgs couples directly to the...
Dr
Gaurav Goswami
(Ahmedabad University)
28/09/2017, 15:25
Cosmology & Astroparticle Physics
The success of a given inflationary model crucially depends upon two features: its predictions for observables such as those of the Cosmic Microwave background (CMB) and its insensitivity to the unknown ultraviolet (UV) physics such as quantum gravitational effects. Extranatural inflation is a well motivated scenario which is insensitive to UV physics by construction. In this five dimensional...
