NTNU Trondheim, Institutt for fysikk

Draw all Feynman diagrams and write down the matrix element M f i of this process at lowest order perturbation theory.. Show that the matrix element is gauge invariant only when

Examination for FY3464 Quantum Field Theory I Contact: Jens O.. FY3464 Quantum Field Theory 1 Final exam 27.05.2016.. b.) Determine the mass dimension of all quantities in the

(6 pts) c.) Draw the Feynman diagrams for φφ → φφ scattering at O (λ 2 ), determine the symmetry factor of these diagrams, and write down the expression for the Feynman amplitude i

(6 pts) c.) Draw the Feynman diagrams for φφ → φφ scattering at O (λ 2 ), determine the symmetry factor of these diagrams, and write down the expression for the Feynman amplitude i

(1) a.) “Derive” the Procca equation combining Lorentz invariance with your knowledge how many spin states a massive spin-1 particle contains.3. b.) Derive the propagator D µν (k) of

[I use the normalisation ¯ uu = 1 and thus fermion have the same phase space as bosons in the final state.. [Note that you can not

In this case, we can integrate and obtain a global conservation law in general only, if T µ···σ is completely anti-symmetric (i.e. For a symmetric tensor as the energy-momentum

a and b. Scalar QED has two coupling constants. “Loop diagrams in lowest order perturbation theory” means all diagrams containing one loop. The full number of points was already