TY - JOUR
T1 - Suppressing the QCD axion abundance by hidden monopoles
AU - Kawasaki, Masahiro
AU - Takahashi, Fuminobu
AU - Yamada, Masaki
N1 - Funding Information:
M.Y. thanks W. Buchmüller for kind hospitality at DESY. This work is supported by MEXT KAKENHI Grant Numbers 15H05889 (M.K. and F.T.) and 23104008 (F.T.), JSPS KAKENHI Grant Numbers 25400248 (M.K.), 24740135 (F.T.), 26247042 (F.T.), and 26287039 (F.T.), JSPS Research Fellowships for Young Scientists (No. 25.8715 (M.Y.)), World Premier International Research Center Initiative (WPI Initiative), MEXT , Japan, and the Program for the Leading Graduate Schools, MEXT , Japan (M.Y.).
Publisher Copyright:
© 2016 The Authors.
PY - 2016/2/10
Y1 - 2016/2/10
N2 - We study the Witten effect of hidden monopoles on the QCD axion dynamics, and show that its abundance as well as isocurvature perturbations can be significantly suppressed if there is a sufficient amount of hidden monopoles. When the hidden monopoles make up a significant fraction of dark matter, the Witten effect suppresses the abundance of axion with the decay constant smaller than 1012GeV. The cosmological domain wall problem of the QCD axion can also be avoided, relaxing the upper bound on the decay constant when the Peccei-Quinn symmetry is spontaneously broken after inflation.
AB - We study the Witten effect of hidden monopoles on the QCD axion dynamics, and show that its abundance as well as isocurvature perturbations can be significantly suppressed if there is a sufficient amount of hidden monopoles. When the hidden monopoles make up a significant fraction of dark matter, the Witten effect suppresses the abundance of axion with the decay constant smaller than 1012GeV. The cosmological domain wall problem of the QCD axion can also be avoided, relaxing the upper bound on the decay constant when the Peccei-Quinn symmetry is spontaneously broken after inflation.
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U2 - 10.1016/j.physletb.2015.12.075
DO - 10.1016/j.physletb.2015.12.075
M3 - Article
AN - SCOPUS:84954500753
SN - 0370-2693
VL - 753
SP - 677
EP - 681
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ER -