Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1993-11-29
Annals Phys. 235 (1994) 77-102
Physics
Nuclear Physics
Nuclear Theory
30 pages, Report # IFT P.070/93, [Text in Latex, e-mail: tomio@ift.uesp.ansp.br ; FAX: 55-11-288-8224]
Scientific paper
10.1006/aphy.1994.1091
Starting from the two-particle Bethe-Salpeter equation in the ladder approximation and integrating over the time component of momentum, we rederive three dimensional scattering integral equations satisfying constraints of relativistic unitarity and covariance, first derived by Weinberg and by Blankenbecler and Sugar. These two-particle equations are shown to be related by a transformation of variables. Hence we show how to perform and relate identical dynamical calculation using these two equations. Similarly, starting from the Bethe-Salpeter-Faddeev equation for the three-particle system and integrating over the time component of momentum, we derive several three dimensional three-particle scattering equations satisfying constraints of relativistic unitarity and covariance. We relate two of these three-particle equations by a transformation of variables as in the two-particle case. The three-particle equations we derive are very practical and suitable for performing relativistic scattering calculations.
Adhikari Sadhan K.
Frederico Tobias
Tomio Lauro
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