Abstract
We have recently proposed that the Standard Model Higgs might be responsible for generating the cosmological perturbations of the universe by acting as an isocurvature mode during a de Sitter inflationary stage. In this paper we study the level of non-Gaussianityin the cosmological perturbations which are inevitably generated due to the non-linearities of the Standard ModelHiggs potential.In particular, for the current central value of the top mass, we find that a future detection of non-Gaussianity would excludethe detection of tensor modes by the PLANCK satellite.
Highlights
The CERN collaborations ATLAS [1] and CMS [2] have recently reported the discovery of a boson, with mass around (125 − 126) GeV, whose branching ratios are fully consistent with the Standard Model (SM) Higgs boson
The comoving curvature perturbation, which provides the initial conditions for the Cosmic Microwave Background (CMB) anisotropies and for the Large Scale Structure (LSS) of the universe, may be generated on superhorizon scales when the isocurvature perturbation, which is associated to the fluctuations of these light scalar fields, is converted into curvature perturbation after of inflation [5,6,7,8,9,10]
If Γ depends on some light fields having a flat spectrum during inflation, the decay rate will be characterized by large-scale spatial fluctuations, leading to a temperature anisotropy, δTr/Tr ∼ δΓ/Γ
Summary
The CERN collaborations ATLAS [1] and CMS [2] have recently reported the discovery of a boson, with mass around (125 − 126) GeV, whose branching ratios are fully consistent with the Standard Model (SM) Higgs boson Motivated by this achievement, some of us have recently pointed out [3] that the SM Higgs field might be responsible for generating the cosmological perturbations of the universe by acting as an isocurvature mode during a de Sitter inflationary stage [4]. [3] we have assumed that there was an inflationary period of accelerated expansion during the primordial evolutionary stage of the universe and that the isocurvature perturbations are generated by the SM Higgs field This allowed us to play with two independent parameters, the SM Higgs mass mh and the Hubble rate H.
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