5 papers · 1 filter
Four - Point Functions of Chiral Primary Operators in N=4 SYM
B. Eden, C. Schubert, E. Sokatchev
We discuss recent progress in the determination of correlators of chiral primary operators in N=4 Super-Yang-Mills theory, based on a combination of superconformal covariance argum…
World Line Path Integrals as a Calculational Tool in Quantum Field Theory
Michael G. Schmidt, Christian Schubert
We report on the status of the string-inspired world line path integral formalism, a recently developed powerful tool for the reorganisation of standard perturbative amplitudes in…
Multiloop Feynman Integrals in the Worldline Approach
Michael G. Schmidt, Christian Schubert
We explain the concept of worldline Green functions on classes of multiloop graphs. The QED beta function and the 2-loop Euler-Heisenberg Lagrangian are discussed for illustration.
Relativistic QFTH - Couplings on the Worldline
Michael G. Schmidt, Christian Schubert
In the framework of the worldline path integral approach to QFTH we discuss spin and relativistic couplings, in particular Yukawa and axial couplings to spin 1/2, and the case of s…
Inverse Mass Expansions from Worldline Path Integrals - Higher Order Coefficients and Ordering Problems
Denny Fliegner, Peter Haberl, Michael G. Schmidt +1
Higher order coefficients of the inverse mass expansion of one--loop effective actions are obtained from a one--dimensional path integral representation. For the evaluation of the…