Location of Repository

We consider how Higgs Inflation can be observationally distinguished from variants based on gauge singlet scalar extensions of the Standard Model, in particular where the inflaton is a non-minimally coupled gauge singlet scalar (S-inflation). We show that radiative corrections generally cause the spectral index n to decrease relative to the classical value as the Higgs mass is increased if the Higgs boson is the inflaton, whereas n increases with increasing Higgs mass if the inflaton is a gauge singlet scalar. The accuracy to which n can be calculated in these models depends on how precisely the reheating temperature can be determined. The number of Einstein frame e-foldings N is similar in both models, with N = 58-61 for singlet inflation compared with N = 57-60 for Higgs inflation. This allows the spectral index to be calculated to an accuracy \Delta n = 0.001. Provided the Higgs mass is above ~ 135 GeV, a combination of a Higgs mass measurement and a precise determination of n will enable Higgs Inflation and S-inflation to be distinguished.Comment: 19 pages (including appendices

Topics:
High Energy Physics - Phenomenology, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Theory

Year: 2011

DOI identifier: 10.1103/PhysRevD.83.123522

OAI identifier:
oai:arXiv.org:1104.2468

Provided by:
arXiv.org e-Print Archive

Download PDF:To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.