Unknotting the polarized vacuum of quenched QED

被引：52

作者：

Broadhurst, DJ

Delbourgo, R

Kreimer, D

机构：

[1] UNIV TASMANIA,DEPT PHYS,HOBART,TAS 7001,AUSTRALIA

[2] UNIV MAINZ,INST PHYS,D-55099 MAINZ,GERMANY

来源：

PHYSICS LETTERS B | 1996年 / 366卷 / 1-4期

关键词：

D O I：

10.1016/0370-2693(95)01343-1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A knot-theoretic explanation is given for the rationality of the quenched QED beta function. At the link level, the Ward identity entails cancellation of subdivergences generated by one term of the skein relation, which in turn implies cancellation of knots generated by the other term. In consequence, each bare three-loop diagram has a rational Laurent expansion in the Landau gauge, as is verified by explicit computation. Comparable simplification is found to occur in scalar electrodynamics, when computed in the Duffin-Kemmer-Petiau formalism.

引用

页码：421 / 428

页数：8

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