Cosmological relaxation and high scale inflation

Tetsutaro Higaki*, Naoyuki Takeda, Yusuke Yamada

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


The relaxion mechanism elegantly solves the Higgs hierarchy problem, but it requires that the early Universe experiences a long inflation phase with a small energy scale since the settle down of the relaxion needs to take place during inflation. In this paper, unlike the original one, we consider another scenario in which the Higgs vacuum expectation value is determined after inflation. To accomplish the mechanism, we take into account the effects of the Hubble-induced mass and thermal one in the dynamics of the relaxion. Then, we find that for the relaxion mechanism the coupling of the relaxion with the additional mass terms should be large.

Original languageEnglish
Article number015009
JournalPhysical Review D
Issue number1
Publication statusPublished - 2017
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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