# Tag Info

Within the standard model: It cannot! Even though there is CP violation in the SM (as you state), the amount is not enough to give the ratio of $\frac{n_B}{n_\gamma} \sim 10^{-10} \ .$ Furthermore, the electroweak phase transition (EWPT) in the SM is not even a second order transition, but merely a crossover. In order to render the transition ...