Maestrello and Linden 



Fig, 6. Integration Contour for Fp 



The above contour, Fig. 6, is deformed to circulations about poles 

 and branch cut in the appropriate half-planes of analyticity as indi- 

 cated below. Fig. 7, for the upper half-plane. 



© 



-0^ 



z) 



Fig. 7. Deformed Integration Contours for T 



The function T has been analytically continued into the k-plane by 

 giving k a small negative imaginary part; so that, the branch points 

 and the poles are displaced off the real axis as indicated in the 

 previous figures. 



The branch- cut integral is given by 



494 



