Antimatter Black Holes: Explaining Matter Prevalence?

[Khashishi]

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?

 

[Pengwuino]

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?

 

[bcrowell]

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.

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

 

[Bill_K]

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.

 

[Lost in Space]

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?