Non-perturbative aspects of screening phenomena in Abelian and non-Abelian gauge theories

被引:19
作者
Blaizot, JP
Iancu, E
机构
[1] UNIV PARIS 11, UNITE RECH, DIV PHYS THEOR, F-91406 ORSAY, FRANCE
[2] UNIV PARIS 06, INST PHYS NUCL, IPN, DIV PHYS THEOR, F-91406 ORSAY, FRANCE
关键词
D O I
10.1016/0550-3213(95)00547-1
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
When computed to one-loop order in resummed perturbation theory, the non-abelian Debye mass appears to be logarithmically sensitive to the magnetic scale g(2)T. More generally, we show that in higher orders power-like infrared divergences forbid the use of perturbation theory to calculate the corrections to Debye screening. A similar infrared problem occurs in the determination of the mass-shell behaviour for the scalar propagator in (2+1)-dimensional scalar electrodynamics. In this context, we provide a non-perturbative approach which solves the infrared problems and allows for an accurate calculation of the scalar propagator in the vicinity of the mass shell.
引用
收藏
页码:559 / 586
页数:28
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