Strong Planck constraints on braneworld and non-commutative inflation

Autor:	Calcagni, Gianluca, Kuroyanagi, Sachiko, Ohashi, Junko, Tsujikawa, Shinji
Rok vydání:	2013
Předmět:	Astrophysics - Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory
Zdroj:	JCAP 03 (2014) 052
Druh dokumentu:	Working Paper
DOI:	10.1088/1475-7516/2014/03/052
Popis:	We place observational likelihood constraints on braneworld and non-commutative inflation for a number of inflaton potentials, using Planck, WMAP polarization and BAO data. Both braneworld and non-commutative scenarios of the kind considered here are limited by the most recent data even more severely than standard general-relativity models. At more than 95 % confidence level, the monomial potential $V(\phi) \propto \phi^p$ is ruled out for $p \geq 2$ in the Randall--Sundrum (RS) braneworld cosmology and, for $p>0$, also in the high-curvature limit of the Gauss--Bonnet (GB) braneworld and in the infrared limit of non-commutative inflation, due to a large scalar spectral index. Some parameter values for natural inflation, small-varying inflaton models and Starobinsky inflation are allowed in all scenarios, although some tuning is required for natural inflation in a non-commutative spacetime. Comment: 24 pages, 12 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1310.5186 Zobrazit plný text záznamu View this record from Arxiv