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:
“O my countrymen!—be nice;Mbe cautious of your language;—and never, O! never let it be forgotten upon what small particles your eloquence and your fame depend.”
—Laurence Sterne (1713–1768)
“Opinions are not to be learned by rote, like the letters of an alphabet, or the words of a dictionary. They are conclusions to be formed, and formed by each individual in the sacred and free citadel of the mind, and there enshrined beyond the arm of law to reach, or force to shake; ay! and beyond the right of impertinent curiosity to violate, or presumptuous arrogance to threaten.”
—Frances Wright (1795–1852)