Are there other small particles?

Besides quarks, there are other particles that make up everything we call matter. Electrons are not quarks, but they are also the smallest kind of matter we know. They have electric charge, but don't have color charge and aren't affected by the strong force. The name for this group of particles is called Leptons. Some of the leptons are negatively charged: like the electron (e), the muon (μ -more massive), and the tau (τ -most massive). There are other ghostlike particles with very small masses and no electric charge called neutrinos: electron-neutrino(νe), muon-neutrino (νμ), tau-neutrino(ντ).

There are also particles that carry all the forces: photons, gluons, and W and Z bosons. You can find more information about them here.


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