Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-07-20
Eur.Phys.J.C54:655-663,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, 9 figures
Scientific paper
10.1140/epjc/s10052-008-0549-y
Based on the postulate that photon propagation is governed by a dynamically broken SU(2) gauge symmetry (scale $\sim 10^{-4} $eV) we make predictions for temperature offsets due to a low-temperature (a few times the present CMB temperature) spectral anomaly at low frequencies. Temperature offsets are extracted from least-square fits of the anomalous black-body spectra to their conventional counterparts. We discuss statistical errors, compare our results with those obtained from calibration data of the FIRAS instrument, and point out that our predicted offsets are screened by experimental errors given the frequency range used by FIRAS to perform their spectral fits. We also make contact with the WMAP observation by blueshifting their frequency bands. Although our results hint towards a strong dynamical component in the CMB dipole and an explanation of low-$l$ suppression it is important in view of its particle-physics implications that the above postulate be verified/falsified by an independent low-temperature black-body precision experiment.
Giacosa Francesco
Hofmann Ralf
Schwarz Markus
Szopa Michal
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