The problem with false vacuum Higgs inflation

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Abstract

We investigate the possibility of using the only known fundamental scalar, the Higgs, as an inflaton with minimal coupling to gravity. The peculiar appearance of a plateau or a false vacuum in the renormalised effective scalar potential suggests that the Higgs might drive inflation. For the case of a false vacuum we use an additional singlet scalar field, motivated by the strong CP problem, and its coupling to the Higgs to lift the barrier allowing for a graceful exit from inflation by mimicking hybrid inflation. We find that this scenario is incompatible with current measurements of the Higgs mass and the QCD coupling constant and conclude that the Higgs can only be the inflaton in more complicated scenarios.

Original languageEnglish
Article number039
Number of pages12
JournalJournal Of Cosmology And Astroparticle Physics
Volume2014
Issue number6
DOIs
Publication statusPublished - 17 Jun 2014

Keywords

  • cosmology of theories beyond the SM
  • ination
  • particle physics - cosmology connection

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