出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The photon propagator is built in the usual light-cone gauge (n2 = n:A = ¶ :A = 0) within the
distributional approach with test functions for the gauge elds. It is shown that test functions
provide a sound denition, as distributions, of singular terms in 1
(n:k)p . The relevance of these
extensions is examplied in a test case where an innite resummation in powers of 1
n:k leads to
known exact results. The effect of residual gauge degrees of freedom on the presence of singular
terms in the most general LC-propagator is discussed in the Dirac-Bergmann algorithm.
