# On a point of logic in the Higgs vs strong force origin of mass

 P: 136 The coupling constants are parameters of the theory. Whatever their values, there will exist a value of θ that yields a massless photon. They are also related to the electromagnetic coupling constant $e$ by the relation $e = g_L\ sin (\theta) = g_Y\ cos (\theta)$ So by measuing $e$ and $\theta$ we can immediately determine their values.