leptonnumrerelated
Lepton-number related describes topics tied to lepton number, a quantum number used to track leptons and antiparticles in particle physics. In commonly used conventions, leptons carry L = +1 and antileptons carry L = −1, with the total lepton number in a process equal to the sum of the individual contributions. Lepton-number conservation is a guiding principle in many weak interactions.
In the Standard Model, lepton number is an accidental global symmetry of renormalizable interactions and is
Beyond the Standard Model, lepton number can be violated if neutrinos are Majorana particles, via mass terms
Lepton-number violation has cosmological relevance through leptogenesis, a scenario in which lepton-number-violating decays create a lepton