Effective weak Lagrangians in the Standard Model and B decays
Abstract
Weak processes (e.g., B decays) with characteristic energies <<MW can be described by an effective theory which does not contain W, Z and other heavy particles (Higgs, t). Its Lagrangian contains four-fermion interaction operators. Essentially it is the theory proposed by Fermi and improved by Feynman, Gell-Mann, Marshak, Sudarshan.
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