  The laws of thermodynamics in the expanding universe are formulated within
the quasi-metric framework. Since the quasi-metric cosmic expansion does not
directly influence momenta of material particles, so that the expansion
directly cools null particles only (e.g., photons), these laws differ
substantially from their counterparts in standard cosmology. In particular, all
non-null neutrino mass eigenstates are predicted to have the same energy today
as they had just after neutrino decoupling in the early universe. As a result,
the predicted relic neutrino background is strongly inconsistent with detection
rates measured in solar neutrino detectors (Borexino in particular). Thus
quasi-metric cosmology is in violent conflict with experiment unless some
exotic property of neutrinos makes the relic neutrino background essentially
undetectable (e.g., if all massive neutrino mass eigenstates decay into
"invisible" particles over cosmic time scales). But in the absence of
experimental confirmation of the necessary exotic neutrino physics needed to
resolve said conflict, the current status of quasi-metric relativity has been
changed to non-viable.
