Particles Not Formed of Quarks
Particles without any quarks have a baryon number of zero. Such particles include leptons (electron, muon, tau and their neutrinos) and gauge bosons (photon, W and Z bosons and gluons); or the hypothetical graviton.
Read more about this topic: Baryon Number
Famous quotes containing the words particles and/or formed:
“The atoms of Democritus
And Newtons particles of light
Are sands upon the Red Sea shore,
Where Israels tents do shine so bright.”
—William Blake (17571827)
“You have lived longer than I have and perhaps may have formed a different judgment on better grounds; but my observations do not enable me to say I think integrity the characteristic of wealth. In general I believe the decisions of the people, in a body, will be more honest and more disinterested than those of wealthy men.”
—Thomas Jefferson (17431826)