I thought the extra term was added so the equations didn't result in probabilities outside the 0-1 range. > "The Higgs boson gives mass to other elementary par

I thought the extra term was added so the equations didn't result in probabilities outside the 0-1 range. > "The Higgs boson gives mass to other elementary particles such as quarks and electrons, and its existence is necessary for the theory to give sensible results (i.e., the probability of processes to occur cannot be greater than 100 percent)." https://www.albany.edu/news/87798.php https://www.albany.edu/news/87798.php