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Results tagged with grand-unification
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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.
4
votes
Accepted
What particles are thought to have existed before Inflation?
I think your question is about electroweak symmetry breaking and GUT symmetry breaking, and not inflation as such.
Here's a list of the fundamentally different particles in the Standard Model. There's …
- 28.7k
1
vote
Are there massless bosons at scales above electroweak scale?
Technically, the gauge bosons are massless at high energy. But, technically, they're massless at low energy too.
All that really changes at low energy is that an effective theory with mass terms becom …
- 28.7k
0
votes
Why do we need complex representations in Grand Unified Theories?
The geometry of spacetime and of the gauge dimensions is fundamentally real. Many textbooks seem to suggest that the Dirac algebra is complexified so that a chiral decomposition is possible, but that' …
- 28.7k