Why is there more matter than antimatter at this point?

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    Antimatter Matter Point
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Discussion Overview

The discussion revolves around the question of why there is more matter than antimatter in the universe, exploring theoretical frameworks, hypotheses, and speculative ideas related to this imbalance. Participants touch on concepts from cosmology, particle physics, and black hole physics.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants note that it is hypothesized there was an equal amount of matter and antimatter before the Big Bang, but an imbalance favored matter over antimatter, though the reasons for this remain unclear.
  • One participant suggests that the imbalance might be due to symmetry violations, such as CP violation, but acknowledges that the exact mechanism is unknown.
  • Another participant refers to the Sakharov conditions, which must be satisfied for the observed matter-antimatter asymmetry, but admits that the historical process is not well understood.
  • A speculative idea is presented regarding antimatter black holes potentially growing in size by capturing matter, raising questions about energy conservation and the nature of antimatter.
  • Some participants challenge the plausibility of the antimatter black hole concept, arguing that black holes do not distinguish between matter and antimatter and that antimatter does not possess negative mass.
  • There is a discussion about the interpretation of Hawking radiation and its implications, with some participants expressing differing views on popular science explanations versus mathematical descriptions.

Areas of Agreement / Disagreement

Participants express a range of views, with some agreeing on the basic hypotheses regarding matter-antimatter imbalance while others contest specific ideas, particularly regarding antimatter black holes and the interpretation of Hawking radiation. The discussion remains unresolved with multiple competing perspectives.

Contextual Notes

There are limitations in the discussion regarding the assumptions made about black holes and antimatter, as well as the interpretations of theoretical concepts like Hawking radiation. The scope of the discussion does not resolve these complexities.

Liza_semi-nerd
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What I have read about antimatter amounts to about this much:
-Each particle is paired with an antiparticle, and when they meet, they annihilate.
-When a particle and antiparticle annihilate, they produce energy and gamma rays.
-It is hypothesized that before the Big Bang, there was an equal amount of matter and antimatter, and when they collided, there was a massive creation of energy; but somehow an imbalance favored matter over antimatter.

But HOW? WHY?
(As my name suggests, I am not such a nerd that I know every physics fact there is. [Does anyone?])
 
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Liza_semi-nerd said:
-It is hypothesized that before the Big Bang, there was an equal amount of matter and antimatter, and when they collided, there was a massive creation of energy; but somehow an imbalance favored matter over antimatter.

Technically it was a short time after the big bang that all this matter and antimatter existed.

Anyways, to answer your question... we don't know! It's a question to which we don't have an answer at this time. It's probably due to a symmetry violation, such as CP violation.
 
Liza_semi-nerd said:
But HOW? WHY?
If you can answer this question and experimentally verify your answer, you will win a Nobel prize!

There are some conditions that we know must be satisfied in order for this to happen (the Sakharov conditions), but it is currently not known exactly how it did happen during the history of the Universe.
 
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This is just a thought.

Hawking's radiation explains how positive mass particles created can escape a black hole and the negative mass particles fall into the black hole and annihilate a positive mass particle inside reducing it's mass and eventually it is reduced to nothing right ?
If that is the case is it possible then that a antimatter black hole would do the same only the negative particles falling into the black hole would have no positive mass particles to annihilate with and a antimatter black hole would grow in size?
Thus all the antimatter could be locked up inside black holes with no way of escaping and all the matter can in a way escape and spread out through the universe.
Would this mean a black hole made up of antimatter would create matter and grow in size violating the conservation of energy rule or would the antimatter be classed as negative energy thereby not violating any rules?

Could this be a plausible or not ?
 
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Gaz said:
Could this be a plausible or not ?
Not. There is no such thing as an "anti-matter" black hole. A black hole does not a priori distinguish matter from anti-matter. Also, anti-matter does not have negative mass. Please do not post personal theories on Physics Forums.
 
It wasn't a theory it was a question but ok.
 
Adding a question mark after a personal theory does not change it's nature. You were complaining earlier that this forum didn't allow personal theories - this is why: people expect an answer to their questions to be based on science as it is practiced and understood, and not personal theories.
 
Gaz said:
Hawking's radiation explains how positive mass particles created can escape a black hole and the negative mass particles fall into the black hole and annihilate a positive mass particle inside reducing it's mass and eventually it is reduced to nothing right ?
No, not really. That IS the way you'll see it described in popular science but it's not quite what actually happens. That form of explanation started with Hawking because, he said, he could not think of any other way to even come close to describing in English what really happens, which can only be described by the math.
 
I didn't even get that bit right and they clicked on i added the q marks so it wasn't a theory lol. Oh well like it or not I enjoyed thinking it up. =)
 

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