Why is the particle process (e-) + (e+) → W+ not possible?
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Replying to @SamuelGWalters
Change needs to be conserved at each vertex.. so vertex doesn’t exist
3 replies 2 retweets 7 likes -
Replying to @InertialObservr @SamuelGWalters
Not only that.. the process can’t even be induced at loop level since it’s at each vertex where charge is conserved
1 reply 2 retweets 6 likes -
Replying to @InertialObservr @SamuelGWalters
This comes down to QED being a U(1) gauge theory, which implies a globally conserved charge.. and since all of our operators are gauge invariant we must have that the "vertices" representing those operators obey that too
1 reply 2 retweets 6 likes -
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oh boy..
9:01 PM - 12 Jun 2019
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