TY - JOUR
T1 - QCD axion window and false vacuum Higgs inflation
AU - Matsui, Hiroki
AU - Takahashi, Fuminobu
AU - Yin, Wen
N1 - Publisher Copyright:
© 2020, The Author(s).
PY - 2020/5/1
Y1 - 2020/5/1
N2 - The abundance of the QCD axion is known to be suppressed if the Hubble parameter during inflation, Hinf , is lower than the QCD scale, and if the inflation lasts sufficiently long. We show that the tight upper bound on the inflation scale can be significantly relaxed if the eternal old inflation is driven by the standard-model Higgs field trapped in a false vacuum at large field values. Specifically, Hinf can be larger than 100 GeV if the false vacuum is located above the intermediate scale. We also discuss the slow-roll inflation after the tunneling from the false vacuum to the electroweak vacuum.
AB - The abundance of the QCD axion is known to be suppressed if the Hubble parameter during inflation, Hinf , is lower than the QCD scale, and if the inflation lasts sufficiently long. We show that the tight upper bound on the inflation scale can be significantly relaxed if the eternal old inflation is driven by the standard-model Higgs field trapped in a false vacuum at large field values. Specifically, Hinf can be larger than 100 GeV if the false vacuum is located above the intermediate scale. We also discuss the slow-roll inflation after the tunneling from the false vacuum to the electroweak vacuum.
KW - Beyond Standard Model
KW - Cosmology of Theories beyond the SM
KW - Higgs Physics
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U2 - 10.1007/JHEP05(2020)154
DO - 10.1007/JHEP05(2020)154
M3 - Article
AN - SCOPUS:85085876433
SN - 1126-6708
VL - 2020
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 5
M1 - 154
ER -