I read that fermions really should be massless when you write down the Lagrangian, as it violates the gauge symmetry. It's the Higgs coupled to them that give them their masses. I was so shocked.(adsbygoogle = window.adsbygoogle || []).push({});

I have only learned QED and abit of QCD Lagrangian, and the fermions did have masses in the Lagrangian...

Also, how many parameters in particle physics are determined by this Higgs thing? Why is everyone still so confident in the Higgs? The LEP accelerator has found no evidence of Higgs.

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# Fermions are massless

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