出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We review a recently proposed all-orders symmetric subtraction procedure for massive Yang-
Mills theory based on the nonlinearly realized gauge group. Physical unitarity is fulfilled order
by order in the loop expansion. The theory is defined in terms of a finite number of physical
parameters entering in the tree-level vertex functional. An outlook on future developments is also
given.
