Higgs chaotic inflation and the primordial B-mode polarization discovered by BICEP2

Kazunori Nakayama, Fuminobu Takahashi

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

We show that the standard model Higgs field can realize the quadratic chaotic inflation, if the kinetic term is significantly modified at large field values. This is a simple realization of the so-called running kinetic inflation. The point is that the Higgs field respects an approximate shift symmetry at high energy scale. The tensor-to-scalar ratio is predicted to be r ≃ 0.13-0.16, which nicely explains the primordial B-mode polarization, r=0.20-0.05+0.07, recently discovered by the BICEP2 experiment. In particular, allowing small modulations induced by the shift symmetry breaking, the negative running spectral index can also be induced. The reheating temperature is expected to be so high that successful thermal leptogenesis is possible. The suppressed quartic coupling of the Higgs field at high energy scales may be related to the Higgs chaotic inflation.

Original languageEnglish
Pages (from-to)96-99
Number of pages4
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume734
DOIs
Publication statusPublished - 2014 Jun 27

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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