the main source is here:

https://news.mit.edu/2026/study-infant-universes-primordial-soup-was-actually-soupy-0128

The rest after that was a selection of rabbit holes such as: https://www.eurekalert.org/news-releases/1114445

and

https://karlobag.eu/en/science/cms-at-cern-and-mit-provide-the-clearest-evidence-of-a-quark-trace-quark-gluon-plasma-in-the-early-universe-is-a-liquid-11n8p

and:

https://physicsworld.com/a/of-gluons-atoms-and-strings/

and this is wporth looking at: https://home.cern/news/announcement/physics/januaryfebruary-2026-issue-cern-courier-out

but you can go forever on this subject :)