Implications of the cosmic calibration tension beyond <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msub> <mml:mi>H</mml:mi> <mml:mn>0</mml:mn> </mml:msub> </mml:math> and the synergy between early- and late-time new physics

Abstract

The cosmic calibration tension is a statistically significant mismatch between the BAO and SN1a distance ladders, possibly indicating deviations from the \ensuremath{\Lambda}CDM framework. Resolving the tension demands new physics and a broader approach --- either focused on a targeted modification of the pre-recombination expansion history, or to a wider change affecting multiple cosmic epochs.

Topics & Concepts