Matter and Antimatter: Why Did Matter Dominate?

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Matter and antimatter were created in equal amounts in the early universe, yet matter ultimately dominated, a phenomenon that remains one of physics' greatest mysteries. Current theories suggest that a slight excess of matter may have resulted from CP violation observed in certain particle decays, such as kaon decay. While matter and antimatter share identical properties except for opposite charges, there are subtle differences in their behavior due to parity and CP asymmetry. These differences, although extremely small, have been observed in specific particle decays, indicating that matter-antimatter interactions are not entirely symmetrical. Understanding why matter prevailed over antimatter continues to challenge physicists today.
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As matter & antimatter are equally created in the early universe , then why matter dominated over antimatter. Please suggest any possible answer
 
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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.
 
I believe your question is one of the largest unsolved 'mysteries' in physics today. So don't expect an answer anytime soon hehe.
 
joychandra said:
As matter & antimatter are equally created in the early universe , then why matter dominated over antimatter. Please suggest any possible answer

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.
 
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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.
 
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).
 
tom.stoer said:
Lifetime of some particles and antiparticles may differ slightly.

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

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