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Two-nucleon systems such as the deuteron, the nucleus of a deuterium atom, as well as protonâproton or neutronâproton scattering are ideal for studying the NN force. Such systems can be described by attributing a potential (such as the Yukawa potential) to the nucleons and using the potentials in a Schroedinger schrÃ¶dinger. equation
Muon. The muon is a lepton which decays to form an electron or positron. The fact that the above decay is a three-particle decay is an example of the conservation of lepton number; there must be one electron neutrino and one muon neutrino or antineutrino in the decay.The lifetime of the muon is 2.20 microseconds.eptons and quarks are the basic building blocks of matter, i.e., they are seen as the elementary particles. There are six leptons in the present structure, the electron, muon, and tau particles and their associated neutrinos.