A quark and an antiquark
Crossword Clue

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AnswerCrossword Clue
MESONA quark and an antiquark
MESONParticle composed of a quark and an antiquark
MESONIt's made up of a quark and an antiquark
charmoniumany of various elementary particles consisting of a charm quark and an antiquark
charmoniaCHARMONIUM, any of various elementary particles consisting of a charm quark and an antiquark
UPSILONMeson made up of a bottom quark and its antiquark
upsilonany of a family of heavy, short-lived, neutral mesons that are composed of a bottom quark and its antiquark
MESONSubatomic particle composed of one quark and one antiquark
bottomfundamental quark that accounts for the existence and lifetime of upsilon particles and has an electric charge of -1/3 and a measured energy of approximately 5 GeV