Speaker
成成 韩
(Sun Yat-sen University)
Description
There is growing evidence that the cosmic dipole measured from the distant galaxy number-count is not consistent with that of CMB and the deviation is getting close to 5σ. We find that the QCD axion, a hypothetical particle originating from the spontaneous breaking of the Peccei-Quinn symmetry, could explain this dipole anomaly if it constitutes the dark matter of our universe. This model requires that the Hubble parameter during inflation should be lower than 10^7 GeV which indicates low scale inflation.
Primary author
成成 韩
(Sun Yat-sen University)
