Editorial Reviews - Leptons From the Publisher Chapters: Electron, Neutrino, Lepton, Muon, Positron, Neutrino Oscillation, Tribimaximal Mixing, Electron Neutrino, Tauon, Trimaximal Mixing, Lepton Number, Quark-lepton Complementarity, Muon Neutrino, Antineutrino, Tauon Neutrino, Pontecorvo-maki-nakagawa-sakata Matrix, Koide Formula. Excerpt: 99943(23)10 u u9810(13) MeV/c The electron is a subatomic particle that carries a negative electric charge. It has no known components or substructure, and therefore is believed to be an elementary particle. An electron has a mass that is approximately 1/1836 that of the proton. The intrinsic angular momentum (spin) of the electron is a half integer value in units of , which means that it is a fermion. The antiparticle of the electron is called the positron, which is identical to the electron except that it carries electrical and other charges of the opposite sign. When an electron collides with a positron, they may either scatter off each other or be totally annihilated, producing a pair (or more) of gamma ray photons. Electrons, which belong to the first generation of the lepton particle family, participate in gravitational, electromagnetic and weak interactions. Electrons, like all matter, have quantum mechanical properties of both a particle and a wave, so they can collide with other particles and be diffracted like light. However, this duality is best demonstrated in experiments with electrons, due to their tiny mass. Since an electron is a fermion, no two electrons can occupy the same quantum state, in accordance with the Pauli exclusion principle. The concept of an indivisible amount of electric charge was theorized to explain the chemical properties of atoms, beginning in 1838 by British natural philosopher Richard Laming; the name electron was introduced... More: http://booksllc.net/?id=9476 Synopsis Chapters: Electron, Neutrino, Lepton, Muon, Positron, Neutrino Oscillation, Tribimaximal Mixing