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Higgs mechanism (redirected from Electroweak symmetry breaking)
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Higgs mechanism The mechanism by which the W boson and the Z boson and, more generally, all massive particles, acquire their mass. In the mid 1960s Peter Higgs, and independently Robert Brout and François Englert, predicted the existence of a massive spin-zero particle is now known as the Higgs boson. The Higgs boson is associated with a scalar field, now known as the Higgs field.
In the Weinberg–Salam model the W boson and the Z boson which mediate the weak interaction acquire their masses by the Higgs mechanism. Higgs bosons have not been found experimentally, although thorough searches up to 130 GeV have been conducted. It is thought that fermions in the standard model acquire their masses by the Higgs mechanism but it has not been possible to implement this suggestion.
Higgs mechanism[′higz ‚mek·ə‚niz·əm]
The feature of the spontaneously broken gage symmetries that the Goldstone bosons do not appear as physical particles, but instead constitute the zero helicity states of gage vector bosons of nonzero mass (such as the intermediate vector boson).
A mathematical procedure in which particles in a field theory gain or lose mass due to spontaneous breakdown of symmetry.
References in periodicals archive
Moreover, the same result was then obtained in four different formulas and three of them on the basis of the classical mechanistic model (actually through the analogue of spontaneous electroweak symmetry breaking
in the SM).
Its only piece lacking direct experimental observation is the mechanism of electroweak symmetry breaking
, providing with mass the weak gauge bosons and it is related to the appearance of the SM Higgs boson.
SM postulates that the origin of electroweak symmetry breaking
is the Higgs mechanism.