The up antiquark, also known as the antiup quark, is the antiparticle of the up quark. The main difference between the two is that some of their properties, such as charge, have the same magnitude but opposite sign.
- Up quark: The antiparticle of the up quark is the up antiquark (sometimes called antiup quark or simply antiup), which differs from it only.
Here are some other properties of antiquarks:
- They have the same mass, mean lifetime, and spin as their respective quarks.
- They are denoted by a bar over the symbol for the corresponding quark, such as for an up antiquark.
- The Quark: The Standard Model is the theoretical framework describing all the known elementary particles.
Quarks and antiquarks are the building blocks of protons and are bound together by the strong force. The up quark and down quark make up protons and neutrons and are the quarks observed in ordinary matter. The up quark is the lightest quark, with a mass of 1.5–5 MeV.
