ABSTRACT
NON-DIVERGENT SECOND-ORDER PROCESSES
Every particle in Nature has an amplitude to move backwards in time, and therefore has an anti-particle.
Richard P. Feynman
In Section 6.5 (b), all second-order processes have been enumerated. It is worthwhile mentioning that only some of them are connected with non-divergent elements of S-matrix, as described in sections (2) and (3). The present chapter will focus on these processes.
