Cosmological implications of the Higgs mass measurement

We assume the validity of the standard model up to an arbitrary high-energy scale and discuss what information on the early stages of the Universe can be extracted from a measurement of the Higgs mass. For M{sub h}{approx}<130 GeV, the Higgs potential can develop an instability at large-field val...

Full description

Saved in:
Bibliographic Details
Published inJournal of cosmology and astroparticle physics Vol. 2008; no. 5; p. 002
Main Authors Espinosa, J R, Giudice, G F, Riotto, A
Format Journal Article
LanguageEnglish
Published United States IOP Publishing 01.05.2008
Subjects
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
COSMOLOGY
DISTURBANCES
FLUCTUATIONS
GEV RANGE
HIGGS BOSONS
HIGGS MODEL
INFLATIONARY UNIVERSE
MASS
POLARIZATION
RELICT RADIATION
STANDARD MODEL
UNIVERSE
Online AccessGet full text

Cover

More Information
Summary:We assume the validity of the standard model up to an arbitrary high-energy scale and discuss what information on the early stages of the Universe can be extracted from a measurement of the Higgs mass. For M{sub h}{approx}<130 GeV, the Higgs potential can develop an instability at large-field values. From the absence of excessive thermal Higgs field fluctuations we derive a bound on the reheat temperature after inflation as a function of the Higgs and top masses. Then we discuss the interplay between the quantum Higgs fluctuations generated during the primordial stage of inflation and the cosmological perturbations, in the context of landscape scenarios in which the inflationary parameters scan. We show that, within the large-field models of inflation, it is highly improbable to obtain the observed cosmological perturbations in a Universe with a light Higgs. Moreover, independently of the inflationary model, the detection of primordial tensor perturbations through the B mode of CMB polarization and the discovery of a light Higgs can simultaneously occur only with exponentially small probability, unless there is new physics beyond the standard model.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2008/05/002