The recent supernova simulations with muon production call for such an analysis, as they relax the standard νμ;τ ¼ ν¯μ;τ (two-flavor) assumption. However, theory does not necessitate that lepton number always be conserved. The water-based detectors Kamiokande II and IMB detected 11 and 8 antineutrinos (lepton number = −1) of thermal origin, respectively, while the scintillator-based Baksan detector found 5 neutrinos (lepton number = +1) of either thermal or electron-capture origin, in a burst less than 13 seconds long. lepton (lĕp´tŏn´) [Gr.,=light (i.e., lightweight)], class of elementary particles [1] that includes the electron [2] and its antiparticle [3], the muon [4] and its antiparticle, the tau and its antiparticle, and the neutrino [5] and antineutrino associated with each of these particles. The next neutrino that is found is the muon neutrino with a particle count of 8. Lepton numbers are just ways to see what types of leptons are going to come out of a reaction given some particle goes in. To fully conserve lepton numbers, two neutrinos must be emitted, a muon neutrino and an electron antineutrino. Electron, Muon, and Tau Neutrinos. Lepton number. and lepton number-driven medium enhancement [3, 16]. In essence, lepton number can be cre-ated [17, 18] or destroyed [19, 20] by active-sterile neu-trino interconversion. Tau neutrino. The same pattern is observed for the muon. There are three different lepton number s: the electron-lepton number \(L_e\), the muon-lepton number \(L_{\mu}\), and the tau-lepton number \(L_{\tau}\).In any interaction, each of these quantities must be conserved separately. Lepton Decay. A lepton is an elementary, half-integer spin (spin 1 ⁄ 2) particle that does not undergo strong interactions. The reaction is thus μ--> e-+ ν e + ν μ. (b) The proton has lepton number zero, the electron has electron lepton number 1, the anti-electron neutrino has electron lepton number -1, the muon neutrino has muon lepton number 1, and its antiparticle has muon lepton number -1. The electron was also the first particle to be discovered. Muon number and tau number operate analogously with the other two lepton families. The lepton family number is defined through the weak basis of the SU(2) doublet, where the charged lepton mass matrix is real and diagonal. The current observational bounds Lepton Number Conservation. A lepton is a particle not affected by the strong nuclear forces, but is only subjected to the weak forces. Unless, the question specified that it is the lepton number for an electron type anti-neutrino. Neutrino oscillation is a quantum mechanical phenomenon whereby a neutrino created with a specific lepton family number ("lepton flavor": electron, muon, or tau) can later be measured to have a different lepton family number. Instead, to this point, lepton flavor conservation is an experimental fact. Our results show the significance of muon and tau lepton number angular distributions, together with the traditional electron lepton number ones. • The muon neutrino (#$) has a muon lepton number … Muon neutrino. One important thing about leptons, then, is that electron number, muon number, and tau number are always conserved when a massive lepton decays into smaller ones. Summary. Lepton number conservation, like electric charge conservation, plays an important role in understanding reactions involving leptons. Together with the muon it forms the second generation of leptons, hence the name muon neutrino. Tau neutrino. The electron and electron neutrino (and their antiparticles) are one set, the muon and muon neutrino are another, and the tau and tau neutrino make up the third. As such, electrons and neutrinos are leptons. In order for both electron lepton number and muon lepton number to be conserved, then the other particles must be an electron anti-neutrino and a muon neutrino. avors, each accompanied by a conserved lepton-avor number.2 In modern textbooks, we describe (negative) muon decay as !e e ; the electron neutrino and the muon neutrino are di erent objects. Along with +!e+ decays, two other rare muon processes provide the most stringent current Subatomic particle - Subatomic particle - Charged leptons (electron, muon, tau): Probably the most-familiar subatomic particle is the electron, the component of atoms that makes interatomic bonding and chemical reactions—and hence life—possible. We can see that the particles have lepton number +1 and the antiparticles have a lepton number -1. 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