Cosmology of Cubic Poincaré Gauge gravity

Abstract

In this paper, we study flat FLRW cosmology for a Poincaré gauge theory containing cubic invariants that is free from ghosts in arbitrary backgrounds in the axial and vector sectors of the torsion tensor. The new degrees of freedom can be related to hypermomentum but continue to be dynamical even in vacuum. These extra degrees of freedom open a more natural way in which to construct potential gravitational models that provide possible ways to modify astrophysical and cosmological physics. In this framework, we study two particular branches of the theory where preliminary routes of exploring these new variables are exposed. The first is the branch where the hypermomentum vanishes, while the second branch involves the setting where the perfect fluid and hypermomentum parts of the sources are independently conserved. In both settings, we find generically faster expanding cosmologies with similar estimates of the cosmic matter content as in the standard model of cosmology. Cubic Poincaré Gauge gravity offers an interesting theoretical basis on which to study cosmology, and indicates some preliminary positive constraints when compared with observational constraints.

21 pages, 3 figures. Some small changes. Matches the published version in Physics of the Dark Universe

References in corpus (25)

• Dynamics of dark energy
• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
• A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• The Pantheon+ Analysis: The Full Dataset and Light-Curve Release
• Challenges for $\Lambda$CDM: An update
• Teleparallel Gravity: From Theory to Cosmology
• The Expansion of the Universe is Faster than Expected
• The $H_0$ Olympics: A fair ranking of proposed models
• On the Hubble constant tension in the SNe Ia Pantheon sample
• The Megamaser Cosmology Project. XIII. Combined Hubble constant constraints
• Hemispherical power asymmetry in the three-year Wilkinson Microwave Anisotropy Probe sky maps
• Running Hubble Tension and a H0 Diagnostic
• The Pantheon+ Analysis: SuperCal-Fragilistic Cross Calibration, Retrained SALT2 Light Curve Model, and Calibration Systematic Uncertainty
• A measurement of the Hubble constant from Type II supernovae
• Revealing Intrinsic Flat $\Lambda$CDM Biases with Standardizable Candles
• Cosmology in cubic and $f(P)$ gravity
• On the homogeneity of SnIa absolute magnitude in the Pantheon+ sample
• Gaussian processes and effective field theory of $f(T)$ gravity under the $H_0$ tension
• Equations of motion in metric-affine gravity: A covariant unified framework
• Cosmological Perturbation Theory in Metric-Affine Gravity
• Stability of Poincaré gauge theory with cubic order invariants
• An Analysis of Variance of the Pantheon+ Dataset: Systematics in the Covariance Matrix?
• Stability in Cubic Metric-Affine Gravity