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Matter and antimatter

  1. Jun 7, 2009 #1
    As matter & antimatter are equally created in the early universe , then why matter dominated over antimatter. Please suggest any possible answer
     
  2. jcsd
  3. Jun 7, 2009 #2
    They're not equally created. Slightly more matter was created the resulted in the universe we see today.

    No-one truly understand the reasons why matter had a slightly larger abundance. This is (at this present time) beyond the scope of observational capabilities.
     
  4. Jun 7, 2009 #3
    I believe your question is one of the largest unsolved 'mysteries' in physics today. So don't expect an answer anytime soon hehe.
     
  5. Jun 7, 2009 #4

    ZapperZ

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    The leading candidate for the explanation on the matter-antimatter imbalance is the CP violation in certain events, such as in kaon decay.

    http://physicsworld.com/cws/article/print/17755

    Zz.
     
    Last edited by a moderator: Apr 24, 2017
  6. Jun 8, 2009 #5
    What are the differences between matter and antimatter. I know they have same spin, same mass and opposite charge. Does there are any other minute differences? Please mention.
     
  7. Jun 8, 2009 #6

    tom.stoer

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    Basically there are no differences except for the opposite charge (you've already mentioned).

    There is one exception, namely the parity and parity-charge asymmetry of the weak interaction. Due to the violation of the P- and CP-symmetry matter and antimatter have slightly different properties. Lifetime of some particles and antiparticles may differ slightly. This effect is extremely small and was observed in neutral K- and B-meson decays. For all other systems matter and antimatter have identical properties (which means that differences may exist but are too small to be visible in experiments).
     
  8. Jun 8, 2009 #7

    Vanadium 50

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    Not so. Lifetimes of particles and antiparticles are the same. CPT assures this. What can be different are branching fractions.
     
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