Low-Redshift Constraints on Covariant Canonical Gauge Theory of Gravity
  Constraints on the Covariant Canonical Gauge Gravity (CCGG) theory from
low-redshift cosmology are studied. The formulation extends Einstein's theory
of General Relativity (GR) by a quadratic Riemann-Cartan term in the
Lagrangian, controlled by a "deformation" parameter. In the Friedman universe
this leads to an additional geometrical stress energy and promotes, due to the
necessary presence of torsion, the cosmological constant to a time-dependent
function. The MCMC analysis of the combined data sets of Type Ia Supernovae,
Cosmic Chronometers and Baryon Acoustic Oscillations yields a fit that is well
comparable with the $\Lambda$CDM results. The modifications implied in the CCGG
approach turn out to be subdominant in the low-redshift cosmology. However, a
non-zero spatial curvature and deformation parameter are shown to be consistent
with observations.
