A model for CMB anisotropies on large angular scales

We investigate the possibility that a low-temperature and low-frequency anomaly in the black-body spectrum, as it emerges when enlarging the standard model's gauge group factor U(1)Y to SU(2) (Yang–Mills scale ∼10−4 eV), explains the discrepancy between the local group's velocity as directly observed and as inferred by assuming a purely kinematic origin of the cosmic microwave background (CMB) dipole. This discrepancy determines the kinetic term for temperature fluctuations in our model. The model can be used to predict the low multipoles with l≥2 in the CMB temperature–temperature correlation and to reinvestigate the issue of statistical isotropy