Both sides previous revision Previous revision Next revision | Previous revision | ||
models:speculative_models:grand_unified_theories [2018/05/22 14:23] jakobadmin [Criticism] |
models:speculative_models:grand_unified_theories [2018/05/22 14:23] (current) jakobadmin [Criticism] |
||
---|---|---|---|
Line 130: | Line 130: | ||
* The Hierarchy Problem, i.e. why $M_W/M_{GUT} <10^{-12}$. | * The Hierarchy Problem, i.e. why $M_W/M_{GUT} <10^{-12}$. | ||
- | * The absence of gravity | + | * The strong CP problem. |
+ | * The cosmological constant problem. | ||
+ | * The absence of gravity. | ||
* The family repetition problem, i.e. why are there three families. | * The family repetition problem, i.e. why are there three families. | ||
* The fermion mass spectrum. | * The fermion mass spectrum. | ||
- | * | + | |
+ | GUTs have nothing to say on these matters. | ||
----- | ----- |