Unitarity of time-like noncommutative gauge theories:: the violation of Ward identities in time-ordered perturbation theory

被引：25
|
作者：
Ohl, T [1 ]
Rückl, R [1 ]
Zeiner, J [1 ]
机构：
[1] Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany
来源：
NUCLEAR PHYSICS B | 2004年 / 676卷 / 1-2期
关键词：
noncommutative field theory; gauge theory; unitarity; Ward identities;
D O I：
10.1016/j.nuclphysb.2003.10.022
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：
We study Ward identities for simple processes with external gauge bosons in the time-ordered perturbation theory approach to time-like noncommutative gauge theories. We demonstrate that these Ward identities cannot be satisfied when all orders in the noncommutativity parameters theta(i0) are taken into account. We conclude that in time-ordered perturbation theory one cannot solve the unitarity problem of time-like noncommutative quantum field theories. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：229 / 242
页数：14
相关论文
共 23 条
123