Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Nolde, David"'
Publikováno v:
JCAP 1602 (2016) 02, 044
We study preheating after hilltop inflation where the inflaton couples to another scalar field, e.g. a right-handed sneutrino, which provides a mechanism for generating the correct initial conditions for inflation and also a decay channel for the inf
Externí odkaz:
http://arxiv.org/abs/1510.04856
Autor:
Antusch, Stefan, Nolde, David
Publikováno v:
JCAP 1509 (2015) 055
Tribrid inflation is a variant of supersymmetric hybrid inflation in which the inflaton is a matter field (which can be charged under gauge symmetries) and inflation ends by a GUT-scale phase transition of a waterfall field. These features make tribr
Externí odkaz:
http://arxiv.org/abs/1505.06910
Publikováno v:
JCAP 1506 (2015) 06, 009
In 'hilltop inflation', inflation takes place when the inflaton field slowly rolls from close to a maximum of its potential (i.e. the 'hilltop') towards its minimum. When the inflaton potential is associated with a phase transition, possible topologi
Externí odkaz:
http://arxiv.org/abs/1503.06075
Publikováno v:
JCAP 1410 (2014) 10, 015
We investigate to which extent and under which circumstances false vacuum energy ($V_0$) dominated slow-roll inflation is compatible with a large tensor-to-scalar ratio $r = O(0.1)$, as indicated by the recent BICEP2 measurement. With $V_0$ we refer
Externí odkaz:
http://arxiv.org/abs/1406.1424
Autor:
Antusch, Stefan, Nolde, David
Publikováno v:
JCAP 1405 (2014) 035
It is generally believed that in single-field slow-roll inflation, a large tensor-to-scalar ratio $r > 0.1$ requires inflaton field values close to or above the Planck scale. Recently, it has been claimed that $r > 0.15$ can be achieved with much sma
Externí odkaz:
http://arxiv.org/abs/1404.1821
Publikováno v:
JCAP 1405 (2014) 034
We propose a class of models of supersymmetric hilltop inflation (also called "new inflation") where the initial conditions of the inflaton close to the hilltop are generated through "matter field preinflation". This is achieved via a coupling term b
Externí odkaz:
http://arxiv.org/abs/1402.5328
Autor:
Nolde, David
Publikováno v:
JCAP11(2013)028
When models of new inflation are implemented in supergravity, the inflaton is a complex and not a real scalar field. As a complex scalar field has two independent components, supergravity models of new inflation are naturally two-field models. In thi
Externí odkaz:
http://arxiv.org/abs/1310.0820
Autor:
Antusch, Stefan, Nolde, David
Publikováno v:
JCAP10(2013)028
We discuss model building in tribrid inflation, which is a framework for realising inflation in the matter sector of supersymmetric particle physics models. The inflaton is a D-flat combination of matter fields, and inflation ends by a phase transiti
Externí odkaz:
http://arxiv.org/abs/1306.3501
Autor:
Antusch, Stefan, Nolde, David
Publikováno v:
JCAP 1211 (2012) 005
We discuss a new class of tribrid inflation models in supergravity, where the shape of the inflaton potential is dominated by effects from the K\"ahler potential. Tribrid inflation is a variant of hybrid inflation which is particularly suited for con
Externí odkaz:
http://arxiv.org/abs/1207.6111
Publikováno v:
JCAP 1208 (2012) 004
We explore a new class of supersymmetric models of inflation where the inflaton is realised as a combination of a Higgs field and (gauge non-singlet) matter fields, using a "tribrid" structure of the superpotential. Inflation is associated with a pha
Externí odkaz:
http://arxiv.org/abs/1205.0809