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A level Physics Feynman diagrams

In electron - proton collisions, the w- particle is transferred from the electron to the proton. But could a w+ particle not be transferred but the in the opposite direction? Like from the proton to the electron?
And if it can’t then could someone please explain why not?
The same goes for the w+ particle in electron capture.

Thanks!
(edited 3 years ago)
It can go both ways
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Mavs04
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Original post by Haywood1743
It can go both ways

Thanks!
So are these two interactions like basically the same but the opposite way round?
Original post by Mavs04
Thanks!
So are these two interactions like basically the same but the opposite way round?

Yes - on a Feynman diagram, a particle moving forwards in time is exactly equivalent to its antiparticle moving backwards in time. However, this is not to be taken literally - in a Hamiltonian framework, particles cannot travel backwards in time.
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Mavs04
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Original post by lordaxil
Yes - on a Feynman diagram, a particle moving forwards in time is exactly equivalent to its antiparticle moving backwards in time. However, this is not to be taken literally - in a Hamiltonian framework, particles cannot travel backwards in time.

Thanks!!

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