an:03314256
Zbl 0197.26103
Abarbanel, H. D. I.; Saunders, L. M.
Laplace transforms and the diagonalization of Bethe-Salpeter equations for absorptive parts
EN
Phys. Rev. D (3) 2, No. 4, 711-716 (1970).
00290734
1970
j
81Q40 44A10
quantum theory
Summary: A Laplace transform is developed for the crossed-channel partial-wave analysis of Bethe-Salpeter-like equations for the absorptive part of scattering matrix elements. The transform requires no assumption about rotating contours to a Euclidean region and allows from the outset power growth in energy of the transformed absorptive part. This eliminates the need for any analytic continuation after the transformation. The diagonalization of the forward and nonforward equations with arbitrary irreducible kernels is explicitly carried out.