- #1
Lapidus
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how many tree-level diagrams in various QED processes
Why do Compton scattering, pair annihilation, Moller scattering and Bhabba scattering have two
tree-level Feynman graphs to sum over, whereas electron-positron to muon-antimuon scattering and electron-muon to electron-muon scattering have only one tree-level Feynman graph?
I suspect that it has something to do with identical particles, but I do not see how.
any help appreciated
Why do Compton scattering, pair annihilation, Moller scattering and Bhabba scattering have two
tree-level Feynman graphs to sum over, whereas electron-positron to muon-antimuon scattering and electron-muon to electron-muon scattering have only one tree-level Feynman graph?
I suspect that it has something to do with identical particles, but I do not see how.
any help appreciated
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