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Physics
High Energy, Nuclear, Particle Physics
Electron Vertex Function in QED
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[QUOTE="Jamister, post: 6207892, member: 664446"] [B]TL;DR Summary:[/B] Form Factors Of QED electron vertex function. In Peskin book they calculate the QED Vertex Function named Gamma which depend on two scalar functions called form factors F1(q^2), F2(q^2). they are calculating F1(q^2) and they do not really finish calculating for what I understand. They are just showing the Infrared divergent is canceled by soft photons. Does it depend on the energy E_l of the largest energy measurable photon? and according to Wikipedia F1[0]=1 to all orders in perturbation theory , why is that? And also, are there any physical quantities that are calculated due to F1[q^2] (I guess probably there are high energy physical quantities, but are there low energy ones such as g the anomalous magnetic moment?) [/QUOTE]
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Electron Vertex Function in QED
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