Chapter

Using Black Holes to Check the Relation Between Mass and Charge of Elementary Particles
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1:48:22 - 1:54:33 (06:11)

Black holes can be used to check the relation between the mass and charge of elementary particles. The mass of the electrons can be less than one but bigger than 10 to the minus 30 in our universe, and the set of consistent quantum field theories are infinite but humongous.

Clips
Though there are an infinite number of quantum field theories, the ones that are consistent are a finite list.
1:48:22 - 1:50:23 (02:01)
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Quantum Field Theories
Summary

Though there are an infinite number of quantum field theories, the ones that are consistent are a finite list. The theories that are considered consistent with gravity form only a small percentage of all possible theories.

Chapter
Using Black Holes to Check the Relation Between Mass and Charge of Elementary Particles
Episode
#204 – Cumrun Vafa: String Theory
Podcast
Lex Fridman Podcast
In string theory, gravitational force is always present but known to be the weakest force compared to the other ones in the landscape due to patterns and a comparison of the mass of electrons.
1:50:24 - 1:51:59 (01:35)
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String Theory
Summary

In string theory, gravitational force is always present but known to be the weakest force compared to the other ones in the landscape due to patterns and a comparison of the mass of electrons.

Chapter
Using Black Holes to Check the Relation Between Mass and Charge of Elementary Particles
Episode
#204 – Cumrun Vafa: String Theory
Podcast
Lex Fridman Podcast
Black hole evaporation provides a means to verify the relationship between the mass and charge of elementary particles, revealing the mass of electrons to be less than one, but greater than 10^-30 in our universe.
1:52:01 - 1:54:33 (02:32)
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Black Hole Evaporation
Summary

Black hole evaporation provides a means to verify the relationship between the mass and charge of elementary particles, revealing the mass of electrons to be less than one, but greater than 10^-30 in our universe. However, the possibility of black hole evaporation necessitates particles with sufficiently small mass so that gravity is weaker, with the mass of electrons turning out to be 10^-20.

Chapter
Using Black Holes to Check the Relation Between Mass and Charge of Elementary Particles
Episode
#204 – Cumrun Vafa: String Theory
Podcast
Lex Fridman Podcast