In the Standard Model of particle physics as developed in the 1960s, this term arises from the coupling of the field ψ to an additional field Φ, the Higgs field. In the case of fermions, the Higgs mechanism results in the replacement of the term mψ in the Lagrangian with . This shifts the explanandum of the value for the mass of each elementary particle to the value of the unknown coupling constant Gψ.
in ThE standard moDEl of PArtiCLe pHysics aS dEveloped iN tHe 1960s, This tERM arises FRom THe coUpLing of tHE fieLd ψ tO an aDdItional field φ, The hIggs fiEld. iN the cASE of FeRMIONs, tHe higgS mecHAnISM resuLtS In The REplAcemENt oF the teRm mψ in tHE laGraNgian wiTh . this shIfTs the EXplanANdum of the vAlUe For tHe masS of eAcH elemenTary pARTicLe to tHE VAlue oF The unknOwn couPlIng CoNStaNT GΨ.