Energy from matter-matter annihilation (relation to Dark Matter)

  1. Hi PF

    Would it be theoretically possible to create energy (for example photons) from matter-matter annihilation (not using anti-matter), so that we could create a powerplant based on this, without the need of producing anti-matter for the energy production?

    I know that Dark Matter WIMP's are good candidates for such a powerplant, since the neutralino is it's own anti-particle. Now if our universe is dominated by Dark Matter, and the neutralino is it's own anti-particle, how come all the Dark Matter just does not annihilate on its self, and cease into existance? If this is not that case (as observation states it is, since we observe a candidate for Dark Matter), then this would not be a good source for the powerplant, so what other possibilities does one have?

    \Schreiber
     
  2. jcsd
  3. ZapperZ

    ZapperZ 29,627
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    Can you show me an example of a matter-matter annihilation, both the physics supporting such a phenomenon, and experiments that indicate that this might be possible? Note that what is done at the LHC (proton-proton collision) has NEVER been referred to as matter-matter annihilation. The physics is different than what we refer to when we deal with matter-antimatter annihilation. So this collision is not an example.

    Zz.
     
  4. ZapperZ

    ZapperZ 29,627
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    Er... OK. If this is your example of "matter-matter" annihilation, then maybe you need to wait a while for this to be established, both in terms of the physics AND empirical verification, before extrapolating it into an energy source. And this is BEFORE one actually discusses the feasibility of (i) trying to capture such particles and direct them to collider and (ii) trying to get enough luminosity to actually make for a more than breakeven energy production (i.e. the economics).

    Zz.
     
  5. Well I was hoping that someone might know another example of this phenomenom (other than in Dark Matter) :)
     
  6. Vanadium 50

    Vanadium 50 17,313
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    Even if you could magically turn DM into energy, there's not enough of it around to make a difference. If you could collect ALL the DM in the Earth, and turn it into electricity, it would power the world for maybe a week.
     
  7. But does any other particles have properties that would allow for matter-matter annihilation (supersymmetric, ordinary or hypothesized particles)? Or could they be sort of "stripped" for all properties, so that only the energy would be left, and annihilation then would be possible?
     
  8. Vanadium 50

    Vanadium 50 17,313
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    Anything else you would have to make, and you could not get any more energy out than the energy you put in.
     
  9. Can fermions be transformed into bosoms?
     
  10. Everybody understands deriving energy from matter via E=mc2. Has matter ever been created out energy by Man? I've often thought this is how a singularity condenses into matter, explaining the BB. I do understand this is a supposition, though.
     
  11. Assuming you meant "...bosons" (picks self up off floor after riotous laughter!) - yes, this happens whenever an electron and positron annihilate into a pair of gamma rays (photons).
     
  12. ZapperZ

    ZapperZ 29,627
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    Please look up, for example, pair production.

    Zz.
     
  13. PAllen

    PAllen 5,375
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    Bosoms are made of fermions (as far as non-virtual constituents goes).
     
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