Higgs inflation: consistency and generalisations
Abstract
We analyse the selfconsistency of inflation in the Standard Model, where the Higgs field has a large nonminimal coupling to gravity. We determine the domain of energies in which this model represents a valid effective field theory as a function of the background Higgs field. This domain is bounded above by the cutoff scale which is found to be higher than the relevant dynamical scales throughout the whole history of the Universe, including the inflationary epoch and reheating. We present a systematic scheme to take into account quantum loop corrections to the inflationary calculations within the framework of effective field theory. We discuss the additional assumptions that must be satisfied by the ultraviolet completion of the theory to allow connection between the parameters of the inflationary effective theory and those describing the lowenergy physics relevant for the collider experiments. A class of generalisations of inflationary theories with similar properties is constructed.
 Publication:

Journal of High Energy Physics
 Pub Date:
 January 2011
 DOI:
 10.1007/JHEP01(2011)016
 arXiv:
 arXiv:1008.5157
 Bibcode:
 2011JHEP...01..016B
 Keywords:

 Cosmology of Theories beyond the SM;
 Global Symmetries;
 Standard Model;
 High Energy Physics  Phenomenology;
 Astrophysics  Cosmology and Extragalactic Astrophysics;
 High Energy Physics  Theory
 EPrint:
 25 pages, 1 figure