SU(N) global gauge anomalies in even dimensions.

SU(N) global gauge anomalies in even dimensions.
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SU(N) 偶数维度的全局规范异常。

DOI:
10.1103/physrevd.37.1655
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发表时间:
1988
期刊:
Physical Review D, Particles and fields
影响因子:
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通讯作者:
R. Marshak
R. Marshak
中科院分区:
--
文献类型:
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作者:
Susumu Okubo;Huazhong Zhang;Y. Tosa;R. Marshak

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假设SU(N)(N = n,n-1)规范群在(D = 2n)维空间中的表示被选择为没有局部(微扰)反常,即,Tr F/sup n//sup +1/ = 0,用群论证明了:(1)对于SU(n),在D = 4k+2中不存在整体(非微扰)规范反常,在D = 4k中至多存在Z/sub 2/整体反常;(2)对于SU(n-1),当D = 2n ≥ 6时,不存在整体规范反常.拓扑参数给出了为什么,对于任何规范群,全球异常是最多Z/分2/和D = 4k+2没有全球规范异常存在的自contragradient表示。
Assuming that the representations of the SU(N) (N = n,n-1) gauge groups in (D = 2n)-dimensional space are chosen to be free of local (perturbative) anomalies, i.e., Tr F/sup n//sup +1/ = 0, the following is proved by group theory: (1) For SU(n), there will be no global (nonperturbative) gauge anomalies in D = 4k+2 and at most Z/sub 2/ global anomalies in D = 4k and (2) for SU(n-1), there exist no global gauge anomalies if D = 2ngreater than or equal to6. The topological argument is given for why, for any gauge group, the global anomaly is at most Z/sub 2/ and in D = 4k+2 no global gauge anomalies exist for a self-contragredient representation.