Phenomenology of mirror fermions in the littlest Higgs model with T-parity
Phenomenology of mirror fermions in the littlest Higgs model with T-parity
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DOI：
10.1088/1126-6708/2006/11/061
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发表时间：
2006-09
影响因子：
5.4
通讯作者：
A. Freitas;D. Wyler
中科院分区：
文献类型：
--
作者：
A. Freitas;D. Wyler
小希格斯模型是解释没有微调的电弱对称破缺的一个有趣的替代方案。再加上离散对称性(T宇称)，自然地避开了来自电弱精度数据的约束，也得到了一个可行的暗物质候选者。T宇称意味着除了小希格斯模型中的重规范玻色子外，还存在新的(镜像)费米子。在这篇文章中，我们考虑了镜像费米子对大型强子对撞机上T宇称最小希格斯模型唯象的影响。我们研究了新粒子最有希望的产生通道和衰变链。我们发现镜像费米子对信号速率的大小和新的物理特征有很大的影响。给出了现实的背景估计。
Little Higgs models are an interesting alternative to explain electroweak symmetry breaking without fine-tuning. Supplemented with a discrete symmetry (T-parity) constraints from electroweak precision data are naturally evaded and also a viable dark matter candidate is obtained. T-parity implies the existence of new (mirror) fermions in addition to the heavy gauge bosons of the little Higgs models. In this paper we consider the effects of the mirror fermions on the phenomenology of the littlest Higgs model with T-parity at the LHC. We study the most promising production channels and decay chains for the new particles. We find that the mirror fermions have a large impact on the magnitude of signal rates and on the new physics signatures. Realistic background estimates are given.