a-cosmology-group/acg#25

Fred Kavli Plenary Lecture: Dan Scolnic (Duke University) (by Lucas Brown)

Scolnic and his teams have worked diligently over the past several years to address these concerns [about the $H_0$ tension]. In his presentation, Prof. Scolnic demonstrated how even tweaking over a dozen aspects of their analysis couldn’t get $H_0$ below about 72.5 km/s/Mpc, still far from the 67.5 km/s/Mpc derived from CMB measurements. Removing entire “rungs” on the cosmic distance ladder also fails to resolve the tension. Prof. Scolnic believes that their measurements are indeed correct, and that part of why other physicists are so apprehensive about the analysis is that there isn’t anything immediately obvious on the theoretical side that can fix the tension.