Mass Generation, Ghost Condensation and Broken Symmetry: SU(2) in Covariant Abelian Gauges
Mass Generation, Ghost Condensation and Broken Symmetry: SU(2) in Covariant Abelian Gauges
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质量生成、幽灵凝聚和破缺对称性：协变阿贝尔规范中的 SU(2)
DOI：
10.1142/9789812778567_0026
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
M. Schaden
中科院分区：
文献类型：
--
作者：
M. Schaden
给出了SU（2）规范理论在一般协变阿贝尔规范中的定域作用量和保证模型微扰重整化的等变BRST对称性。在任意小的耦合下，鬼-反鬼凝聚自发破缺了模型的SL（2，R）对称性。这导致传播是有限的，在欧几里德动量的所有基本领域，除了阿贝尔“光子”。Ward恒等式表明，对称破缺产生了鬼数为（1，2，-2，-1）和（0，1，-1，0）的无质量BRST四重态.后者的四重被解释为由于阿贝尔希格斯机制的双重描述的模型。
The local action of an SU(2) gauge theory in general covariant Abelian gauges and the associated equivariant BRST symmetry that guarantees the perturbative renormalizability of the model are given. A global SL(2,R) symmetry of the model is spontaneously broken by ghost-antighost condensation at arbitrarily small coupling. This leads to propagators that are finite at Euclidean momenta for all elementary fields except the Abelian ``photon''. Ward Identities show that the symmetry breaking gives rise to massless BRST-quartets with ghost numbers (1,2,-2,-1) and (0,1,-1,0). The latter quartet is interpreted as due to an Abelian Higgs mechanism in the dual description of the model.