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In particle physics, lepton number (historically also called lepton charge) [1] is a conserved quantum number representing the difference between the number of leptons and the number of antileptons in an elementary particle reaction. [2]
The two U(1) factors can be combined into U(1) Y × U(1) l, where l is the lepton number. Gauging of the lepton number is ruled out by experiment, leaving only the possible gauge group SU(2) L × U(1) Y. A similar argument in the quark sector also gives the same result for the electroweak theory.
In particle physics, a lepton is an elementary particle of ... A much stronger conservation law is the conservation of the total number of leptons ... Koide formula;
All leptons carry a lepton number L = 1. In addition, leptons carry weak isospin, T 3, which is − 1 / 2 for the three charged leptons (i.e. electron, muon and tau) and + 1 / 2 for the three associated neutrinos. Each doublet of a charged lepton and a neutrino consisting of opposite T 3 are said to constitute one generation of ...
In physics, a conservation law ... lepton number, baryon ... In the one-dimensional space a conservation equation is a first-order quasilinear hyperbolic equation ...
The Koide formula is an unexplained empirical ... to explain origins of the charged lepton spectrum as well as the Koide formula, ... Physics. arXiv : hep-ph/0005137. ...
Q is for quantum: an encyclopedia of particle physics. New York, NY: Free Press. ISBN 978-0-684-85578-3. Oerter, Robert (2006). The theory of almost everything: the Standard Model, the unsung triumph of modern physics. New York, NY: Pi Press. ISBN 978-0-452-28786-0. Schumm, Bruce A. (2004). Deep down things: the breathtaking beauty of particle ...
The Ideas of Particle Physics: An Introduction for Scientists. Cambridge University Press. ISBN 978-1-108-72740-2. D.J. Griffiths (1987). Introduction to Elementary Particles. John Wiley & Sons. ISBN 978-0-471-60386-3. W. N. Cottingham and D. A. Greenwood (2023). An Introduction to the Standard Model of Particle Physics. Cambridge University Press.