From freyablekman https://twitter.com/freyablekman on Twitter: # 1214: Ypsilon mesons have different masses depending on the spins of their b quark+antiquark. It's the first time Y's 3S state is seen in lead collisions. This results measures the quark-gluon plasma and how quarks stay together inside particles https://cms-results.web.cern.ch/cms-results/public-results/publications/HIN-21-007/ https://twitter.com/freyablekman/status/1643608218302664706/photo/1 https://chirp.cooleysekula.net/attachment/8e8427eb5f2df1189949d5cb4432fde4aaba6bac7ec35486d301d78cffc0ae88/view