SLAC (@SLAClab) tweetou às 10:25 PM on qua, Abr 03, 2013: Interested how dark matter might relate to the Standard Model? A few thoughts from @JayWacker on @Quora - http://t.co/06Klz8x2mk (https://twitter.com/SLAClab/status/319561229263831040) Adquira o aplicativo oficial do Twitter em https://twitter.com/download
The existence of dark matter is the strongest piece of evidence for physics Beyond the Standard Model. The observation of dark matter indicates that there is a new particle (see Dark Matter: Which measurements confirm the existence of dark matter?).
Up until the early 1990s it was possible that dark matter was the neutrino of the Standard Model, however, this is excluded because the neutrino is sufficiently light not be able to account for the missing mass. The neutrino would also give rise to hot dark matter and would "washout" early structure formation.
Occasionally black holes are considered candidates for dark matter, but searches for gravitational lensing from these dark matter candidates exclude almost all of the allowed mass ranges for black hole dark matter. Additionally, there are issues (potentially resolvable) in producing a sufficient number of black holes in the early Universe and not altering other cosmological predictions.
Thus there is a new particle that exists, but that we have been unable to discover. The leading candidates are
Up until the early 1990s it was possible that dark matter was the neutrino of the Standard Model, however, this is excluded because the neutrino is sufficiently light not be able to account for the missing mass. The neutrino would also give rise to hot dark matter and would "washout" early structure formation.
Occasionally black holes are considered candidates for dark matter, but searches for gravitational lensing from these dark matter candidates exclude almost all of the allowed mass ranges for black hole dark matter. Additionally, there are issues (potentially resolvable) in producing a sufficient number of black holes in the early Universe and not altering other cosmological predictions.
Thus there is a new particle that exists, but that we have been unable to discover. The leading candidates are
- Weakly Interacting Massive Particles (WIMPs) which include the LSP of Supersymmetric theories
- The Peccei-Quinn Axion which can solve the strong CP problem
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