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this is about particle antiparticle pairs being produced outside the event horizon of black hole. this is what i know about it:

we know that a black hole has entropy. it therefore must have temperature and hence must radiate. however, a black hole is defined as a body which pulls in everything inside its event horizon. the explanation i know is -- virtual matter - antimatter pairs are produced for a short while, one of the particles with positive energy and the other with negative energy(Hiesenberg's uncertainty principle allows such pairs to be formed for a short time) the one with positive energy escape and the other enters the black hole and thus reduces its mass.

however, this is what i read about it in a website:

"Consider a virtual electron-positron pair produced just outside the event horizon. Once the pair is created, the intense curvature of spacetime of the black hole can put energy into the pair. Thus the pair can become non-virtual; the electron does not fall back into the hole. There are many possible fates for the pair. Consider one of them: the positron falls into the black hole and the electron escapes. According to Feynman's view we can describe this as follows:

The electron crosses the event horizon travelling backwards in time, scatters, and then radiates away from the black hole travelling forwards in time."

i cant understand it. what are they trying to say. its going over my head. pls tell me, which one is correct.

Also, if my view is correct, then could this be the reason we have more matter than antimatter in the universe. i believe matter and antimatter were created in equal quantities at the big bang. it could be possible that 'matter' usually has a higher probability of obtaining positive energy.

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# Virtual pair production - black holes

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