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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
noun (plural neutrinos). A neutral subatomic particle with a mass close to zero and half-integral spin, which rarely reacts with normal matter. Three kinds of neutrinos are known, associated with the electron, muon, and tau particle.Example sentences. 1  The leptons consist of the charged electron, muon and tau, together with three electronically neutral particles-the electron neutrino, muon neutrinos and tau neutrinos.2  The proton and the neutron are baryons; the electron, the muon, and the neutrino are leptons; whilst the pions are mesons.xample sentences. 1  The leptons consist of the charged electron, muon and tau, together with three electronically neutral particles-the electron neutrino, muon neutrinos and tau neutrinos. 2  The proton and the neutron are baryons; the electron, the muon, and the neutrino are leptons; whilst the pions are mesons.