DIAGRAMMATIC APPROACH TO PAIR PRODUCTION IN SLOWLY VARYING AND CONSTANT FIELDS

被引:17
作者
CHIU, CB [1 ]
NUSSINOV, S [1 ]
机构
[1] MAX PLANCK INST PHYS & ASTROPHYS,D-8000 MUNICH 40,FED REP GER
来源
PHYSICAL REVIEW D | 1979年 / 20卷 / 04期
关键词
D O I
10.1103/PhysRevD.20.945
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We consider the problem of pair creation in slowly varying and essentially constant fields using directly momentum-space Feynman diagrams for the pair production amplitude. When the production occurs via many interactions with small energy transfer, the problem can be viewed as an integration on paths in energy space. An estimate via the integral over the optimal path given by Hamilton's principle, a fuller Lagrangian equation, is introduced and discussed. The existence of such a classical path reflects in an asymptotic behavior such as n!cn of high-order Feynman diagrams, which in a formal Borel-type summation yields the essentially singular tunneling behavior in constant fields. © 1979 The American Physical Society.
引用
收藏
页码:945 / 951
页数:7
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