lpetrich
Science Advisor
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After that amount of time? It would be early in the Universe's history. Extrapolation of the Standard Model's coupling constants with increasing interaction energy reveals that they meet at around 2*1016 GeV.kneemo said:Hence, from the perspective of phase transitions, SU(3)xSU(2)xU(1) would be the result of a broken higher symmetry, due to the Universe entering an "ice-like" state after 13.82 billion years.
But the overall principle is correct, I think, and a variety of higher-symmetry Grand Unified Theories have been proposed.