Speaker
Dr
NING CHEN
(Nankai University)
Description
We propose an SU(6) GUT, which enjoys a global symmetry of SU(2)*U(1)_{PQ}. The GUT breaking to the SM gauge symmetry undergoes two stages. The second stage of symmetry breaking scale corresponds to the axion physics scale. By studying the Peccei-Quinn quality constraint, we show an upper bound to the axion decay constant to be consistent with the classical axion window. The QCD axion, which has a KSVZ-type coupling to the vector-like quarks, has a DFSZ-type effective di-photon couplings, and can be probed by the upcoming IAXO experiment. Some other issues of the SU(6) GUT will be discussed as well.
Author
Dr
NING CHEN
(Nankai University)
Co-authors
Mr
ZHAOLONG TENG
Mr
YUTONG LIU
