Soft cheese made from skim milk.
Hypothetical truly fundamental particle in mesons and baryons; there are supposed to be six kinds of quarks (and their antiquarks), which come in pairs; has an electric charge of +2/3 or -1/3.
A fundamental fermion that has strong interactions. Quarks have electric charge of either +2/3 (up, charm, top) or -1/3 (down, strange, bottom) in units where the proton charge is 1.
Hypothetical sub-atomic entity with fractional electric charge, the supposed material from which hadrons are built up.
In physics, the elementary particle that is the fundamental constituent of all hadrons (baryons, such as neutrons and protons, and mesons). There are six types, or “flavors”: up, down, top, bottom, strange, and charmed, each of which has three varieties, or “colors”: red, yellow, and blue (visual color is not meant, although the analogy is useful in many ways). To each quark there is an antiparticle, called an antiquark. See quantum chromodynamics.
The existence of the top quark still remains to be confirmed, though two competing teams of physicists at Fermilab claimed to have found it March 1995. It is unstable and unlikely to last more than a millionth of a billionth of a billionth of a second, but experiments at Fermilab suggest it is at least as massive as a silver atom, and 20,000 times heavier than an up quark.
Čestica iz koje se sastoje sve elementarne čestice, protoni i dr. (eng.)
Čestica od čijeg otkrića se atom ne može smatrati najsitniji delom materije.