Particle and Antiparticle Magnetic Fields
Most recent answer: 12/30/2014
- Bishnu Bhatta (age 20)
Nice question. You can divide the magnetic field up into the part that carries energy away as part of an electromagnetic field and the local static field. I guess you're more interested in the radiating part, since it's that energy loss that can cause the orbiting particle-antiparticle pair to spiral in toward each other.
If you look from far away the magnetic fields from the two particles add up, because they have opposite charges and also are traveling opposite directions. The radiating part adds up also, because the accelerations are also opposite. So the pair just act like a little dipole transmitter sending off electromagnetic waves. (I'm treating this all classically.)
When they get very close, the classical approximation isn't good, because their wave-functions are spread out enough to overlap. That's when they can annihilate. Whatever comes out will still have an equal balance of matter and antimatter
(published on 12/30/2014)