What is the meaning of Upsilon_particle?
Any of a number of bound states of a heavy quark and its antiquark, especially that formed from a bottom quark and an anti-bottom quark.
Source: wiktionary.orgSearch words containing
Any of a number of bound states of a heavy quark and its antiquark, especially that formed from a bottom quark and an anti-bottom quark.
Source: wiktionary.orgSearch words containing