YM-Thermodynamics 2024, 45: SU(2) Black-Body Anomaly

For a bolometric, radiometric detection of low-frequency modifications of black-body spectra at temperatures between 5 - 20 K, so the relevant quantity is the spectral radiance L(ν, T) = c/(4π) ⨉ I(ν, T). In a deconfining SU(2) plasma, the velocity of light in vacuum is replaced by a group velocity through the (anti)screening function G. From the spectral energy density, given as

Propagating photon frequencies don't allow for any heat exchange, as the radiance differentials wrt. the solid-angle elements defined on a sphere, so by using Snell's law, and separation of variables, derive the radiance line temperature.

Radiometric measurements inside the frequency regime of total screening may test the postulate for SU(2)CMB, rather than U(1).