Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Dark matter and Antimatter-matter

  1. Aug 11, 2015 #1
    We know that in the Baryogenesis happened a asymmetry between baryons and antibaryons.Here Is matter only BM(baryonic matter) or BM+DM.

    If its only BM so we have extra DM which its a matter.So the Baryogenesis solved ? (Here of course it cant be solved cause theres a big difference between BM and DM but at least we have matter superiority)
     
    Last edited: Aug 11, 2015
  2. jcsd
  3. Aug 11, 2015 #2

    Orodruin

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    Baryogenesis is the creation of baryons over anti-baryons (as the name suggests). Baryons are made of quarks and not even leptons are a priori included in baryogenesis.

    There are theories where also the dark matter sector contains an asymmetry, which in those theories by design is related to the baryon asymmetry. The common name for theories of this sort is asymmetric dark matter (ADM).
     
  4. Aug 11, 2015 #3
    I didnt noticed that. And I dont know why.
    There are theories where also the dark matter sector contains an asymmetry, which in those theories by design is related to the baryon asymmetry. The common name for theories of this sort is asymmetric dark matter (ADM).
    So theres a anti DM ? Is that violates or affects the curvature of universe (Cause there will be extra energy)
     
  5. Aug 11, 2015 #4

    Orodruin

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    We do not know the answer to this question. In many theories, including the very popular SUSY neutralino, dark matter is its own anti-particle. In ADM models, DM is distinct from anti-DM and the asymmetry is such that there is no (or very little) anti-DM in the Universe today.
     
  6. Aug 11, 2015 #5

    Chalnoth

    User Avatar
    Science Advisor

    In most models, dark matter is made out of nearly equal parts matter and anti-matter, particles which only annihilate with one another slowly due to their weak interactions.
     
  7. Aug 11, 2015 #6
    f theres anti DM, and DM decays antimatter, then If anti DM decays we will get matter.Which it explains why theres dark matter no anti DM and no anti mattet ?
     
  8. Aug 11, 2015 #7

    Chalnoth

    User Avatar
    Science Advisor

    The term "dark matter" typically refers to both matter and anti-matter components of any dark matter that may exist.
     
  9. Aug 11, 2015 #8

    Orodruin

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    Also, by energy conservation and most often charge conservation, a particle cannot decay to its anti particle and something else. Some times you can have particle-antiparticle oscillations, but these go both ways.
     
  10. Aug 11, 2015 #9
    One possibility, proposed at one time is DM as sterile neutrinos. Here is a relevant paper.

    http://arxiv.org/abs/1306.4954

    I haven't heard too much on this in the past two years. Though I do encounter its possibility in numerous SO(10) MSSM papers. I've been digging up some papers on the Pati-Salam subgroup. Which involves left-right hand chirality.


    My two better finds In this is the following

    SO(10) A La Pati-Salam

    http://arxiv.org/pdf/hep-ph/0204097
    Another helpful article is this gem

    The Phenomenology of Right Handed Neutrinos
    http://arxiv.org/abs/1303.6912

    from what I've read its still one possibility.
     
  11. Aug 11, 2015 #10

    Chronos

    User Avatar
    Science Advisor
    Gold Member

    Possible evidence for sterile neutrinos was announced by two papers released nearly the same time in 2014- re:http://arxiv.org/abs/1402.2301 and http://arxiv.org/abs/1402.4119v1. They have been collectively cited nearly 400 times since release. The enthusiasm for sterile neutrinos as DM candidate particles has waned somewhat, but, remains in play.
     
  12. Aug 11, 2015 #11

    Thanks I recall reading those papers but had lost track of them. Glad to see you kept the links to them.
     
  13. Aug 11, 2015 #12

    Chronos

    User Avatar
    Science Advisor
    Gold Member

    You probably recall I was the one who brought them up last year.
     
  14. Aug 11, 2015 #13
    Yep I do.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Dark matter and Antimatter-matter
  1. Matter and antimatter (Replies: 22)

Loading...