TY - JOUR
T1 - Cosmological relaxation and high scale inflation
AU - Higaki, Tetsutaro
AU - Takeda, Naoyuki
AU - Yamada, Yusuke
N1 - Funding Information:
Supported in the past by public research grants (ref.: H85E08000200005) from the Italian Medicines Agency (AIFA). No funding was received for this work from any of the following organizations: National Institutes of Health (NIH); Wellcome Trust; and the Howard Hughes Medical Institute (HHMI).
Publisher Copyright:
© 2017 American Physical Society.
PY - 2017
Y1 - 2017
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85019557971&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85019557971&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.95.015009
DO - 10.1103/PhysRevD.95.015009
M3 - Article
AN - SCOPUS:85019557971
SN - 2470-0010
VL - 95
JO - Physical Review D
JF - Physical Review D
IS - 1
M1 - 015009
ER -