Top Quark - Mass and Coupling To The Higgs Boson

Mass and Coupling To The Higgs Boson

The Standard Model describes fermion masses through the Higgs mechanism. The Higgs boson has a Yukawa coupling to the left- and right-handed top quarks. After electroweak symmetry breaking (when the Higgs acquires a vacuum expectation value), the left- and right-handed components mix, becoming a mass term.

The top quark Yukawa coupling has a value of

where v = 246 GeV is the value of the Higgs vacuum expectation value.

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