I Latest Findings from DESI Collaboration

[MrRobotoToo]

Dr. Smethurst summarizes the latest results of the DESI collaboration. What I found especially interesting is that the current value of the Hubble constant that they obtained from baryon acoustic oscillations is in good agreement with the value obtained from Lamda-CDM using Planck data.

 

[ohwilleke]

The more notable finding from DESI, in my humble opinion, is that it favors a sum of the three neutrino masses which is less than the minimum value of that quantity derived from neutrino oscillation data. See Nathaniel Craig, Daniel Green, Joel Meyers, Surjeet Rajendran, "No νs is Good News" arXiv:2405.00836 (May 1, 2024).

A DESI Hubble Constant value consistent with the Planck CMB based estimate doesn't solve the Hubble tension because there are still plenty of late time measurements of the Hubble constant with values inconsistent with that lower CMB based value. Adding one more measurement to the mix doesn't resolve the fact that we have different values from what are each credible ways to do the measurement. We need to figure out how to reconcile all of the credible measurements of the Hubble constant to resolve the tension. See my previous discussion of this issue here.

 

[Vanadium 50]

And T2K + NoVA see the opposite with respect to the hierarchy.

You can drive yourself crazy chasing one and two sigma tensions. Excited theorists just add entropy - you can't get a paper that says "wait and see" published.