TY - JOUR
T1 - Enhanced axion–photon coupling in GUT with hidden photon
AU - Daido, Ryuji
AU - Takahashi, Fuminobu
AU - Yokozaki, Norimi
N1 - Funding Information:
This work is supported by JSPS Research Fellowships for Young Scientists (R.D.), Tohoku University Division for Interdisciplinary Advanced Research and Education (R.D.), JSPS KAKENHI Grant Numbers JP15H05889, JP15K21733, JP17H02875 (F.T and N.Y.) JP26247042 (F.T), JP17H02878 (F.T.), JP17H05396 (N.Y.), and by World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan (F.T.).
Funding Information:
This work is supported by JSPS Research Fellowships for Young Scientists (R.D.), Tohoku University Division for Interdisciplinary Advanced Research and Education (R.D.), JSPS KAKENHI Grant Numbers JP15H05889 , JP15K21733 , JP17H02875 (F.T and N.Y.) JP26247042 (F.T), JP17H02878 (F.T.), JP17H05396 (N.Y.), and by World Premier International Research Center Initiative (WPI Initiative), MEXT , Japan (F.T.).
Publisher Copyright:
© 2018 The Authors
PY - 2018/5/10
Y1 - 2018/5/10
N2 - We show that the axion coupling to photons can be enhanced in simple models with a single Peccei–Quinn field, if the gauge coupling unification is realized by a large kinetic mixing χ=O(0.1) between hypercharge and unbroken hidden U(1)H. The key observation is that the U(1)H gauge coupling should be rather strong to induce such large kinetic mixing, leading to enhanced contributions of hidden matter fields to the electromagnetic anomaly. We find that the axion–photon coupling is enhanced by about a factor of 10–100 with respect to the GUT-axion models with E/N=8/3.
AB - We show that the axion coupling to photons can be enhanced in simple models with a single Peccei–Quinn field, if the gauge coupling unification is realized by a large kinetic mixing χ=O(0.1) between hypercharge and unbroken hidden U(1)H. The key observation is that the U(1)H gauge coupling should be rather strong to induce such large kinetic mixing, leading to enhanced contributions of hidden matter fields to the electromagnetic anomaly. We find that the axion–photon coupling is enhanced by about a factor of 10–100 with respect to the GUT-axion models with E/N=8/3.
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U2 - 10.1016/j.physletb.2018.03.039
DO - 10.1016/j.physletb.2018.03.039
M3 - Article
AN - SCOPUS:85044750690
SN - 0370-2693
VL - 780
SP - 538
EP - 542
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 -