Speaker
Description
In this talk, I will present an updated “H0 Olympics” analysis using the latest cosmological datasets from Planck NPIPE, ACT DR6, SPT-3G, and DESI. We systematically compare twelve representative models from the recent literature, covering both early- and late-time proposals to resolve the Hubble tension. We also examine whether extensions such as a time-varying dark energy equation of state or non-zero spatial curvature improve the fit to the combined datasets or alter the apparent preference for dynamical dark energy. Compared to the 2020 analysis, current data show a stronger preference for early dark energy scenarios over other classes of solutions, with a genuine shift of $H_0$ toward higher values that is independent of late-time priors. However, even in these models, a residual tension of about $2.5$–$3\sigma$ remains, while the dynamical dark energy hint remain largely unaffected. I will conclude by discussing recent attempts to go beyond these results and the prospects for a fully satisfactory resolution.