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A brief review of effective SU(2) Yang-Mills thermodynamics in thedeconfining phase is given, including the construction of the thermalground-state estimate in terms of an inert, adjoint scalar field $\phi$, basedon non-propagating (anti)selfdual field configurations of topological chargeunity. We explain why the screening physics of an SU(2) photon is subject to anelectric-magnetically dual interpretation. Next, we elucidate how alow-frequency excess of line temperature in the Cosmic Microwave Background(CMB) determines the value of the critical temperature of thedeconfining-preconfining phase transition of an SU(2) Yang-Mills theorypostulated to describe photon propagation, and we describe how, starting at aredshift of about unity, SU(2) photons collectively work 3D temperaturedepressions into the CMB. Upon projection along a line of sight, a givendepression influences the present CMB sky in a cosmologically local way,possibly explaining the large-angle anomalies confirmed recently by the Planckcollaboration. Finally, six relativistic polarisations residing in the SU(2)vector modes roughly match the number of degrees of freedom in cosmic neutrinos(Planck) which would disqualify the latter as radiation. Indeed, if interpretedas single center-vortex loops in confining phases of SU(2) Yang-Mills theoriesneutrino mass $m_\nu$ solely arises by interactions with an environment.Cosmologically, the CMB represents this environment, and thus one would expectthat $m_\nu=\xi T$ where $\xi=O(1)$. In this model cosmic neutrinos are a smalldark-matter contribution, conserved only together with the CMB fluid,influencing Baryonic Acoustic Oscillations during CMB decoupling.

Thermodynamics of SU(2) quantum Yang-Mills theory and CMB anomalies