Tag: quarkonia
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CMS observes melting of Upsilon particles in heavy-ion collisions
In 2011, CMS presented early evidence that Upsilon (Υ) particles produced in lead-lead collisions “melt” as a consequence of interacting with the hot nuclear matter created in these heavy-ion interactions.
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CMS observes hints of melting of Upsilon particles in lead-nuclei collisions
In our Universe today, quarks are always bound together by gluons to form “composite” particles such as protons and neutrons.