![]() Therefore another particle with a lepton number of +1, charge 0 and baryon number 0 must be added so that all conservation laws are satisfied. ![]() However, we now have a positron on the right hand side meaning the lepton number on the right hand side is -1 (minus because it's an antiparticle). On the left hand side of the equation it is zero and on the right hand side of the equation it must therefore also be zero. In particle physics, lepton number (historically also called lepton charge)1 is a conserved quantum number representing the difference between the number. This is a positron, the antiparticle of the electron (e +). There are three different lepton numbers: the electron-lepton number L e, the muon-lepton number L, and the tau-lepton number L. In particle physics, lepton number (historically also called lepton charge) is a conserved quantum number representing the difference between the number of leptons and the number of antileptons in an elementary particle reaction. Secondly charge must be conserved, This is because on the left hand side there is a proton of charge +1 and on the right hand side there is a neutron of charge 0 so there must be another particle on the right hand side to balance the charge. See also: Electron capture Positron Quantum mechanics. ![]() This is conserved because the baryon number of on the left hand side is 1 (from the proton) and 1 on the right hand side from the neutron. Before the beta decay there are no leptons, that is, the lepton number is zero. (Energy and momentum are assumed to be conserved.) Firstly, baryon number. The electron, positron, muons, and neutrinos are examples of leptons. ![]() Here you have to consider various conservation laws, including: baryon number, lepton number and charge. So, while the number of known particles was small and they explained a great deal. This is a proton decaying into a neutron and two other subatomic particles. There are many experiments under way or proposed to discover whether that’s the case. ![]()
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