Analytical study of Yang-Mills theory in the infrared from first principles

Understand

Pure Yang-Mills SU(N) theory is studied in the Landau gauge and four dimensional space.

• While leaving the original Lagrangian unmodified, a double perturbative expansion is devised, based on a massive free-particle propagator.
• In dimensional regularization, all diverging mass terms cancel exactly in the double expansion, without the need to include mass counterterms that would spoil the symmetry of the Lagrangian.
• No free parameters are included that were not in the original theory, yielding a fully analytical approach from first principles.