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RE: A crash course on particle physics to get prepared for the steemSTEM meetup at CERN - 1 - the structure of matter
Do the particles in the same column have the same mass btw?
Do the particles in the same column have the same mass btw?
No, all masses are different. Excepted neutrinos, each mass is a free parameter of the model that has to be tuned according to measurements. They have all been found different. In the Standard Model, neutrinos are massless. This contradicts data. You can check my answer to the comment of @nonationnoborder for more information with this respect.