up quark

Up quarks can also be used to create more complex particles, such as pions.

Two of these are up quarks, one of them is a down quark.

A proton is made of two up quarks and one down quark.

This means that the two up quarks in a proton must be repelling each other.

For example, would turn all up quarks in the universe into down quarks and vice-versa.

Real particles like electrons and up quarks are more complex and have additional terms in their Lagrangians.

Down quarks are the second lightest quark, the first being up quarks.

Quarks are able to change from up quarks to down quarks.

I conjured up quarks and antiquarks.

The bare mass of up quarks is so light, it cannot be straightforwardly calculated because relativistic effects have to be taken into account.

The two up quarks and one down quark of the proton are held together by the strong force, mediated by gluons.

Up quarks and down quarks are two of the six types of quarks.

Up quarks are subatomic particles that help make up many larger particles, like protons.

As Murray Gell-Mann, who thought up quarks, once put it, the theorists would have to "fall on their fountain pens."

The particle would consist of two up quarks, two down quarks and one known as an anti-strange quark.

Is it theoretically possible that a proton could consist of two up quarks and a strange quark in place of the down quark?

An example from the real world is isospin symmetry, an SU(2) group corresponding to the similarity between up quarks and down quarks.

A similar mysterious situation was with the Δ baryon; in the quark model, it is composed of three up quarks with parallel spins.

By this means the neutron decays into a proton (which contains one down and two up quarks), an electron, and an electron antineutrino.

Protons and Neutrons are made out of quarks, of two types; up quarks and down quarks.

Like all quarks, Up quarks are elementary particles, which means that they are so small that scientists believe that they can not be divided any more.

Protons consist of two up quarks and one down quark, while antiprotons consist of two anti-ups and an anti-down.

"Electrons have a charge of negative one unit, up quarks have a positive two-thirds charge, and down quarks have a negative one-third charge.

Isospin symmetry can be generalized to flavour symmetry, an SU(3) group corresponding to the similarity between up quarks, down quarks, and strange quarks.

In one view, the up quarks bind relatively tightly to the down quarks, with the strange quark standing alone, and the whole contraption tumbles about like a three-atom molecule.