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arXiv 0810.4441hep-ph
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普适额外维度：卡鲁扎-克莱因宇称的破坏

Universal extra dimension: Violation of Kaluza-Klein parity

Biplob Bhattacherjee

备注：
11 pages, 5 figures,a few comments added
发表信息：
Phys.Rev.D79:016006,2009
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摘要：

最小通用额外维度（mUED）模型遵循卡鲁扎-克莱因（KK）奇偶性$(-1)^n$，其中$n$是KK数。然而，有可能相互作用只位于$S_1/\ztwo$轨道的两个固定点之一。这种不对称的相互作用违反了KK宇称。这杀死了UED的冷暗物质成分，但也消除了逆紧化半径的上限，因此即使在大型强子对撞机上没有观测到KK激发也不一定会使模型无效。除了最轻的$n=1$ KK激发的衰减，这导致碰撞机信号，这是显着不同的mUED方案。这种KK-宇称违反条款的唯象后果进行了探讨。

英文摘要：

The minimal Universal Extra Dimension (mUED) model respects the Kaluza-Klein (KK) parity $(-1)^n$, where $n$ is the KK number. However, it is possible to have interactions located at only one of the two fixed points of the $S_1/\ztwo$ orbifold. Such asymmetric interactions violate the KK parity. This kills the cold dark matter component of UED but also removes the upper bound on the inverse compactification radius, and thus non-observation of the KK excitations even at the Large Hadron Collider does not necessarily invalidate the model. Apart from the decay of the lightest $n=1$ KK excitation, this leads to collider signals which are markedly different from those in the mUED scenario. The phenomenological consequences of such KK-parity violating terms are explored.

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