What Is Dark Matter?

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Dark matter is a form of matter that cannot be detected directly through electromagnetic radiation but is inferred from its gravitational effects on visible matter. It is distinct from dark energy and is not simply a cosmological constant. The leading candidate for dark matter is currently supersymmetry (SUSY) particles, specifically neutralinos, which are theorized to be stable and weakly interacting. Observations, such as those from the Bullet Cluster, provide strong evidence for dark matter's existence, showing a separation between normal and dark matter during cosmic events. Despite ongoing research, the exact nature of dark matter remains a mystery in cosmology.
  • #51
Okay guys, if a layman would wrap this up, it’ll be:

"the strong force acts sort of like springs between the quarks"

And the reason the quarks don’t BOOM! gets sucked into a micro black hole, is the uncertainty principle (making it impossible to nail down those little bastards).

This leads to a tension (virtual energy) inside the nucleons, and this energy can be translated to 90% QCD Mass.

Einstein: E = m (big!)

Correct?

(Can I have the Nobel Prize now?? :biggrin:)

P.S. George thanks for the link to http://books.google.com/books?id=w9Dz56myXm8C&printsec=frontcover#v=onepage&q&f=false"!
 
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  • #52
DevilsAvocado said:
And the reason the quarks don’t BOOM! gets sucked into a micro black hole, is the uncertainty principle (making it impossible to nail down those little bastards).
Not quite. There's a bit more to the story. It's probably more correct to say that quarks simply aren't energetic enough. If you look back at the expression I posted above, as you increase the mass/energy of the particle, the Schwarzschild radius gets larger while the Compton wavelength gets smaller. Eventually, you reach an energy scale at which they meet. Then you get a black hole. Thinking in terms of the uncertainty principle, one sees that as the energy increases, the minimum uncertainty in the location of the particle decreases (this is the reason for the decrease in the Compton wavelength). Then, when that minumum uncertainty becomes smaller than the Schwarzschild radius, BOOM!, we form a black hole.
 
  • #53
bapowell said:
Not quite. There's a bit more to the story. ...
Okay, thanks bapowell.

Correction:
"the strong force acts sort of like springs between the quarks"
And the reason the quarks can resist the strong force (inwards), is the uncertainty principle.
This leads to a tension (virtual energy) inside the nucleons, and this energy can be translated to 90% QCD Mass.

Correct?
 
  • #54
Potential energy, not virtual energy.
 
  • #55
Thanks Chalnoth! Finally it feels like I have some 'weight' in QCD! :cool:
 

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