Lab recreates the Big Bang’s first millisecond, revealing a soupy primordial plasma
Physicists at the LHC's CMS collaboration watched a high-energy quark traverse quark-gluon plasma by using Z bosons as a clean directional tag. They observed a subtle less-than-1% dip in backward-produced hadrons, consistent with a wake in the primordial soup and offering new insight into the liquid-like properties of the early-universe plasma.