Headline is deceptive. If you read the article, they created conditions predicted to have existed shortly after the big bang. Like all infinite regressions, as you get closer the energy required to create the state becomes infinitely higher. They didn’t claim to have recreated the big band.
Recreate the big bands? Now THERE"s something I could really get behind. Benny Goodman, Duke Ellington, Artie Shaw - I love those guys. That is definitely my kind of music. What? You meant "big bang" not "big band"? Oh....nevermind.