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Q & A: Quark level charge?

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Most recent answer: 07/28/2009
Do we know why there is no integer electric charge at the quark level? I understand that ensembles become integer charge, but could the quarks and gluons naively be creating some type of meissner effect that shields them?
- Kyle (age 22)
Nope, we don't know why quarks have the charge they seem to have.   By the way, I remind you that no free quark has ever been seen.  The quark theory is a very successful theory of the fundamental constituents of our observable particles, like protons and mesons.  It works so well we tend to believe it.


(published on 07/28/2009)

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