김성구
2016-08-28T11:08:42Z
2016-08-28T11:08:42Z
1985
0556-2821
OAK-13000
http://dspace.ewha.ac.kr/handle/2015.oak/229052
In the context of the Dirac equation, we show that the Schwinger-DeWitt proper-time expansion of the exact Greens function is useful for high-energy scattering and, in fact, provides a systematic generalization of the eikonal approximation. Because of its simplicity and its direct appeal to the coordinate-space scattering picture, the Schwinger-DeWitt expansion method should be valuable in studying corrections to the lowest-order eikonal approximation. A numerical comparison is made for an exponential potential. Within the same framework a systematic formalism is also developed to deal with large-angle scattering, and this yields a generalization of Schiffs large-angle formula. Applications to high-energy scattering problems in quantum field theories are indicated. © 1985 The American Physical Society.
English
Schwinger-DeWitt proper-time expansion and eikonal approximation
Article
4
31
SCOPUS
829
847
Physical Review D
10.1103/PhysRevD.31.829
2-s2.0-35949025741
Kim S.K.
Lee C.
Min D.P.
김성구(22967145800;18836103200)
20180104081001