Abstract

The Standard Model of electromagnetic and weak interactions of elementary particles has been applied successfully to a wide variety of phenomena. Most of the phenomenological applications are made in the framework of perturbation theory, which appears to be a good approximation since most of the couplings are small. In the Standard Model the masses of particles, including the W- and Z-bosons, quarks and the yet to be discovered Higgs particle, are generated by means of the Higgs mechanism. As a result the masses are related to the coupling constants in a definite way. In particular the Higgs mass can be expressed as

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