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A Grand Unified Theory is a model in particle physics in which at ultra-high energy, the 3 gauge interactions of the Standard Model (electromagnetic, weak, and strong) merge into a single one, characterized by one larger encompassing gauge symmetry and one unified coupling constant. After SSBreaking, force carriers differentiate themselves and are driven by the RG to their values and numbers in the lab. Use for gauge GUT and gravity unification.

A Grand Unified Theory (GUT) is a model in particle physics in which at ultra-high energy, the three gauge interactions of the Standard Model (electromagnetic, weak, and strong) merge into a single one. This is characterized by one larger encompassing gauge symmetry and hence one unified coupling constant. After suitable SSBreaking, the several force carriers differentiate themselves and are driven by the renormalization group to their values and numbers in the lab at conventional energies. Use for gauge GUT as well as gravity unification.

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