Antimatter Black Holes: Explaining Matter Prevalence?

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Discussion Overview

The discussion explores the characteristics of black holes formed from matter versus those formed from antimatter, particularly in relation to the no-hair theorem and implications for the balance of matter and antimatter in the universe. It encompasses theoretical considerations and speculative scenarios regarding black hole interactions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants propose that according to the no-hair theorem, there is no difference between black holes formed from matter and those formed from antimatter.
  • Others question the premise that antimatter black holes would be more prevalent than matter black holes in the early universe, suggesting that this does not logically explain the observed prevalence of matter.
  • A participant notes that the no-hair theorem applies primarily to electrovac solutions and highlights the importance of considering black holes with charge.
  • It is suggested that black holes, when they evaporate, do not retain information about the lepton and baryon numbers of the particles that formed them, which may have implications for conservation laws.
  • One participant raises a hypothetical scenario regarding the collision of an antimatter black hole with a matter black hole, questioning the nature of the resulting energy and matter produced from such an event.

Areas of Agreement / Disagreement

Participants generally agree that there is no intrinsic difference between black holes formed from matter and those formed from antimatter, but there is disagreement regarding the implications of this for the matter-antimatter balance in the universe and the consequences of black hole interactions.

Contextual Notes

The discussion includes assumptions about the nature of black holes and their formation, as well as the applicability of the no-hair theorem to different scenarios. There are unresolved questions regarding the implications of black hole evaporation and the outcomes of hypothetical collisions.

Khashishi
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Is there any difference between a black hole formed from matter and a black hole formed from antimatter? The no-hair theorem says no, right? If there is no difference, then that means that a black hole can disturb the balance between matter and antimatter, by eating up all the antimatter. Could this explain the preponderance of matter?
 
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Why would anti-matter black holes be anymore prevalent than matter black holes at the beginning of the universe in order to cause the prevalence of matter?
 
Khashishi said:
Is there any difference between a black hole formed from matter and a black hole formed from antimatter? The no-hair theorem says no, right?
A couple of caveats: (1) The no-hair theorems only holds for electrovac solutions. Solutions with hair are known for other fields besides EM. (2) I assume you're talking about electrically neutral black holes, since a black hole with charge +Q would become a black hole with charge -Q if you formed it out of the corresponding antimatter ingredients.

Khashishi said:
If there is no difference, then that means that a black hole can disturb the balance between matter and antimatter, by eating up all the antimatter.
I don't follow what you mean by this, but a possibly related idea is this. Black holes have no hair, so when they evaporate, they violate many of the usual conservation laws of particle physics. For example, they have no memory of the lepton number and baryon number that went into them.

-Ben
 
To add to this, you're correct that there's no difference between a black hole that was made from matter and one that was made from antimatter. Conversely, when a black hole evaporates it radiates a thermal distribution composed of anything having quantum numbers of the vacuum, including matter-antimatter pairs.
 
What would happen if an antimatter black hole collided with a matter black hole? Would there be an total conversion to energy or would the resulting debris in any 'explosion' be composed of positively charged or negatively charged matter depending on which of the two black holes was more massive?
 

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