TY - JOUR
T1 - Diphoton excess from hidden U(1) gauge symmetry with large kinetic mixing
AU - Takahashi, Fuminobu
AU - Yamada, Masaki
AU - Yokozaki, Norimi
N1 - Funding Information:
M. Y. thanks T. T. Yanagida and K. Yonekura for useful comments concerning footnote 12 . This work is supported by MEXT KAKENHI Grant Numbers 15H05889 and 15K21733 (F.T. and N.Y.), JSPS KAKENHI Grant Numbers 26247042 , and 26287039 (F.T.), JSPS Research Fellowships for Young Scientists (M.Y.), World Premier International Research Center Initiative (WPI Initiative), MEXT , Japan (F.T. and M.Y.).
Publisher Copyright:
© 2016 The Author(s)
PY - 2016/9/10
Y1 - 2016/9/10
N2 - We show that the 750 GeV diphoton excess can be explained by introducing vector-like quarks and hidden fermions charged under a hidden U(1) gauge symmetry, which has a relatively large coupling constant as well as a significant kinetic mixing with U(1)Y. With the large kinetic mixing, the standard model gauge couplings unify around 1017 GeV, suggesting the grand unified theory without too rapid proton decay. Our scenario predicts events with a photon and missing transverse momentum, and its cross section is related to that for the diphoton excess through the kinetic mixing. We also discuss other possible collider signatures and cosmology, including various ways to evade constraints on exotic stable charged particles. In some cases where the 750 GeV diphoton excess is due to diaxion decays, our scenario also predicts triphoton and tetraphoton signals.
AB - We show that the 750 GeV diphoton excess can be explained by introducing vector-like quarks and hidden fermions charged under a hidden U(1) gauge symmetry, which has a relatively large coupling constant as well as a significant kinetic mixing with U(1)Y. With the large kinetic mixing, the standard model gauge couplings unify around 1017 GeV, suggesting the grand unified theory without too rapid proton decay. Our scenario predicts events with a photon and missing transverse momentum, and its cross section is related to that for the diphoton excess through the kinetic mixing. We also discuss other possible collider signatures and cosmology, including various ways to evade constraints on exotic stable charged particles. In some cases where the 750 GeV diphoton excess is due to diaxion decays, our scenario also predicts triphoton and tetraphoton signals.
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U2 - 10.1016/j.physletb.2016.07.013
DO - 10.1016/j.physletb.2016.07.013
M3 - Article
AN - SCOPUS:84989842673
SN - 0370-2693
VL - 760
SP - 486
EP - 493
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 -