We shall see that transitions into the vacuum lead to the separation of the factors ( 1 6) and (17) and shall study the properties ... are certainly nonperturbative effects, they can nonetheless be described in QED2 in Feynman-diagram language. ... 5a. Our discussion will proceed as follows. We first calculate the transition amplitude of Fig. 5a. In the calculation of the ... 3... x + *Al)-+ (pi-Ap-fe.2)J:- - (20) The eikonal formulas15 would transform (20) to a form fac- torized in the photon momentaanbsp;...
|Title||:||Soviet Journal of Nuclear Physics|