Theta vacuum of the bosonized massive light-front Schwinger model

被引:11
作者
Martinovic, L [2 ]
Vary, JP
机构
[1] Slovak Acad Sci, Inst Phys, Bratislava 84228, Slovakia
[2] Iowa State Univ, Int Inst Theoret & Appl Phys, Ames, IA 50011 USA
[3] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA
基金
美国国家科学基金会;
关键词
D O I
10.1016/S0370-2693(99)00636-X
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The massive Schwinger model in bosonic representation is quantized on the light front using the Dirac-Bergmann method and focusing on vacuum aspects. The non-perturbative theta vacuum in terms of coherent states of the gauge-field zero mode is derived and found to coincide with the simple, but non-trivial vacuum of the massless model. On the other hand, the mass term becomes complicated due to the constrained zero mode of the scalar field, and can only be treated iteratively. As an example, the theta dependence of the leading order mass correction to the chiral condensate is calculated. (C) 1999 Published by Elsevier Science B.V. All rights reserved.
引用
收藏
页码:186 / 192
页数:7
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