ndung200790 said:Please teach me this:
I wonder whether there exist only quarks(6 quarks) and leptons being really elementary particles. Or there are many another types of particles?
Thank you in advance.
Hawkwind said:It depends on what and how you count.
The 6 quarks come in 3 colors; so one may be inclined to count in fact 18 quarks.
In addition to these spin 1/2 particles which you have mentioned there are also spin 1 fields, which are denoted as "particles" too - the so-called gauge bosons: 8 gluons, 2 W-bosons, the Z-boson and the photon. Last not least, there is the long awaited Higgs boson, predicted by the standard model but unobserved yet.
genneth said:That's still neglecting the fact that in the weak theory there's only a single handedness, but that flavour basis isn't the same as the QCD flavour basis... Which all complicates the counting a little bit...
Quarks and leptons are subatomic particles that make up the fundamental building blocks of matter. Quarks are the smallest known particles, and they combine to form protons and neutrons, which make up the nucleus of an atom. Leptons, on the other hand, are particles that do not interact through the strong nuclear force, and they include electrons and neutrinos.
Scientists have conducted numerous experiments and observations that have shown that quarks and leptons are the smallest known particles. They have also been able to study their behavior and interactions, which have further confirmed their elementary nature.
No, there are other elementary particles, such as bosons, which are responsible for carrying the fundamental forces in the universe, and the Higgs boson, which gives particles their mass. However, quarks and leptons are the only known elementary particles that make up matter.
Quarks interact with each other through the strong nuclear force, while leptons interact through the weak nuclear force and electromagnetism. They also interact with each other through the exchange of bosons, which carry the fundamental forces.
So far, there is no evidence to suggest that quarks and leptons can be broken down into smaller particles. They are considered to be the most fundamental building blocks of matter and are not composed of any smaller components.