Covariant perturbation theory and chiral superpropagators
Abstract
We use a covariant formulation of perturbation theory for the nonlinear chiral invariant pion model to define chiral superpropagators leading to S matrix elements which are independent of the choice of the pion field coordinates. The relation to the standard definition of chiral superpropagators is discussed.
 Publication:

Physics Letters B
 Pub Date:
 November 1972
 DOI:
 10.1016/03702693(72)900743
 Bibcode:
 1972PhLB...42..253E