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.
Read more about this topic: Top Quark
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