Anomalies in orbifold field theories

Anomalies in orbifold field theories
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轨道场论中的异常现象

DOI:
10.1016/s0370-2693(01)01430-7
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发表时间:
2001
期刊:
影响因子:
4.4
通讯作者:
F. Zwirner
F. Zwirner
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
C. Scrucca;M. Serone;L. Silvestrini;F. Zwirner

文献摘要

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我们研究了局部异常抵消产生的额外维度模型的约束。考虑一个具有U(1)规范场和带电费米子的五维场论,在轨道S1/(Z2×Z2′)上紧化.我们表明,即使轨道投影删除两个费米子零模式,有规范异常本地化的固定点。在第五维积分之后,反常现象自然而然地被消除了,但是规范不变性被破坏了,破坏了理论的一致性。我们讨论了它们对现实的超对称模型与一个单一的希格斯超多重态的散装,和可能的取消机制,在非最小模型的影响。
We study the constraints on models with extra dimensions arising from local anomaly cancellation. We consider a five-dimensional field theory with a U(1) gauge field and a charged fermion, compactified on the orbifold S1/(Z2×Z2′). We show that, even if the orbifold projections remove both fermionic zero modes, there are gauge anomalies localized at the fixed points. Anomalies naively cancel after integration over the fifth dimension, but gauge invariance is broken, spoiling the consistency of the theory. We discuss their implications for realistic supersymmetric models with a single Higgs hypermultiplet in the bulk, and possible cancellation mechanisms in non-minimal models.