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Título

Strong Planck constraints on braneworld and non-commutative inflation

Autor Calcagni, Gianluca ; Kuroyanagi, Sachiko; Ohashi, Jjunko; Tsujikawa, Shinji
Palabras clave Cosmology of theories beyond the SM
Inflation
Fecha de publicación 2014
EditorInstitute of Physics Publishing
Citación Journal of Cosmology and Astroparticle Physics 2014(03): 052 (2014)
ResumenWe 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(φ)φp is ruled out for p 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. © 2014 IOP Publishing Ltd and Sissa Medialab srl.
URI http://hdl.handle.net/10261/110713
DOI10.1088/1475-7516/2014/03/052
Identificadoresdoi: 10.1088/1475-7516/2014/03/052
issn: 1475-7516
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