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Linné on line arrow Physics and the Cosmos arrow Physics and the Cosmos arrow Quarks and leptons arrow Do quarks have a substructure?

Do quarks have a substructure?

Do the particles today called elementary have an inner structure? If this would be the case then they are, of course, not elementary particles but would themselves consist of a new type of even smaller elementary particles, sometimes called preons. However, as far as we know today the quarks are really elementary.

There have also been several experiments trying to find out whether the electron has a substructure. But none found any indications of this. On the other hand, this does not mean that we can exclude a substructure on a level which we cannot measure today. The conclusion for the time being is therefore that the particles we call elementary are really elementary.