Author(s): Bernardo, Heliudson [UNESP] ; Costa, Renato ; Nastase, Horatiu [UNESP] ; Weltman, Amanda
Date: 2019
Persistent ID: http://hdl.handle.net/11449/189439
Origin: Oasisbr
Subject(s): cosmology of theories beyond the SM; ination; physics of the early universe; cosmology of theories beyond the SM; cosmology of theories beyond the SM; ination; ination; physics of the early universe; physics of the early universe
Made available in DSpace on 2019-10-06T16:40:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-04-15
We investigate the possibility that the inflaton, in particular in conformal inflation models, is also a chameleon, i.e. that it couples to the energy density of some heavy non-relativistic matter present during inflation. We find new and interesting attractor-like behaviours, either prolonging inflation, or changing the observables ns,r, depending on the sign of the chameleon coupling exponent. We also check that the chameleon coupling with the heavy matter field strongly suppresses entropy modes during inflation.
Instituto de Física Teórica UNESP-Universidade Estadual Paulista, R. Dr. Bento T. Ferraz 271, Bl. II
Cosmology and Gravity Group Department of Mathematics and Applied Mathematics University of Cape Town, Private Bag
Instituto de Física Teórica UNESP-Universidade Estadual Paulista, R. Dr. Bento T. Ferraz 271, Bl. II
