In the Standard Model, quark-lepton masses are also generated by their couplings with the Higgs particle as the W, Z vector bosons are. Their masses are different because the Yukawwa couplings are different. In principles, quark-leptons can have non-zero masses before the Higgs mechanism. Higgs may add only corrections to the final masses. Is there any way to determine that the quark-lepton masses are partially or totally generated by the Higgs mechanism?
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