Correlation functions between an odd number of terms vanish in this theory according to Furry's theorem. The Z1 and Z2 renormalization factors are equal to all orders of this theory, which accurately describes Bhabha scattering. The inner product of an on-shell four-momentum with a scattering amplit
Correlation functions between an odd number of terms vanish in this theory according to Furry's theorem. The Z1 and Z2 renormalization factors are equal to all orders of this theory, which accurately describes Bhabha scattering. The inner product of an on-shell four-momentum with a scattering amplitude equals zero according to the Ward identity in this theory. Trace identities are very useful for manipulating the (*) gamma matrices that appear in this theory. This U(1) abelian gauge theory expands problems perturbatively in powers of the fine structure constant, which is also the coupling constant for the interaction it describes. This theory can be used to compute the Klein-Nishina formula for the Compton scattering cross section, and its extremely accurate predictions won the Nobel Prize for Feynman, Schwinger, and Tomonaga. For 10 points, name this quantum field theory that describes the fundamental force mediated by photons.
Correlation functions between an odd number of terms vanish in this theory according to Furry's theorem.