models:speculative_models:grand_unified_theories
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models:speculative_models:grand_unified_theories [2018/03/26 15:15] jakobadmin [History] |
models:speculative_models:grand_unified_theories [2018/05/22 14:23] (current) jakobadmin [Criticism] |
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| - | ====== Grand Unified Theories ====== | + | ====== Grand Unified Models ====== |
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| <blockquote>“People can construct models with higher symmetries and stand on their nose and try to avoid proton decay,” Nanopoulos said. “OK, you can do it, but … you cannot show it to your mother with a straight face.” https://www.quantamagazine.org/20161215-proton-decay-grand-unification/</blockquote> | <blockquote>“People can construct models with higher symmetries and stand on their nose and try to avoid proton decay,” Nanopoulos said. “OK, you can do it, but … you cannot show it to your mother with a straight face.” https://www.quantamagazine.org/20161215-proton-decay-grand-unification/</blockquote> | ||
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| + | ---- | ||
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| + | **Major Questions still unsolved in GUTs** | ||
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| + | * The Hierarchy Problem, i.e. why $M_W/M_{GUT} <10^{-12}$. | ||
| + | * The strong CP problem. | ||
| + | * The cosmological constant problem. | ||
| + | * The absence of gravity. | ||
| + | * The family repetition problem, i.e. why are there three families. | ||
| + | * The fermion mass spectrum. | ||
| + | |||
| + | GUTs have nothing to say on these matters. | ||
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models/speculative_models/grand_unified_theories.1522070154.txt.gz · Last modified: 2018/03/26 13:15 (external edit)
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