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Are there quarks with a neutral change a predicted elementary subatomic particle?

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In leptons we have neutrino's with neutral charges. So there are + - and neutral muons.

In baryons and mesons there are + - quarks like charm / strange.

Are baryons predicted to have a neutral quark / quarks which we haven't detected yet (like in lepton family)?

asked Oct 8, 2018 in Theoretical Physics by Curious-John (0 points) [ no revision ]

No, no neutral quark(s) are predicted by the Standard Model.

commented Oct 8, 2018 by Vladimir Kalitvianski (102 points) [ no revision ]

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