A Quirky Probe of Neutral Naturalness
A Quirky Probe of Neutral Naturalness
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DOI：
10.1103/physrevd.94.011504
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发表时间：
2015-12
影响因子：
5
通讯作者：
Z. Chacko;D. Curtin;C. Verhaaren
中科院分区：
文献类型：
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作者：
Z. Chacko;D. Curtin;C. Verhaaren
我们认为在LHC的顶级伙伴对生产作为中性自然理论的探索所产生的信号。我们专注于顶级伙伴携带电弱电荷的场景，例如折叠超对称性或古怪小希格斯粒子。在这类理论中，最高的伙伴是成对产生的古怪的束缚态，因为它们在一个镜像色群下带电，而镜像色群的最轻态是隐藏的胶球。这些奇异粒子迅速去激发并湮灭成胶球，胶球通过希格斯混合衰变回SM费米子。这可能会在大型强子对撞机上产生壮观的特征，例如位移衰变或高多重性促使产生许多硬$\bar B B$或$\tau^+ \tau^-$对。我们发现，从顶级合作伙伴对生产所产生的信号构成了这类理论在大多数区域的参数空间的主要发现渠道，并可能提供唯一的实验探针的情况下，分厘米胶球衰变长度。测量顶级伙伴的质量和耦合，可以用来直接测试中性自然机制，也是一个诱人的可能性。
We consider the signals arising from top partner pair production at the LHC as a probe of theories of Neutral Naturalness. We focus on scenarios in which top partners carry electroweak charges, such as Folded SUSY or the Quirky Little Higgs. In this class of theories the top partners are pair produced as quirky bound states, since they are charged under a mirror color group whose lightest states are hidden glueballs. The quirks promptly de-excite and annihilate into glueballs, which decay back to SM fermions via Higgs mixing. This can give rise to spectacular signatures at the LHC, such displaced decays, or high-multiplicity prompt production of many hard $\bar b b$ or $\tau^+ \tau^-$ pairs. We show that signals arising from top partner pair production constitute the primary discovery channel for this class of theories in most regions of parameter space, and might provide the only experimental probe of scenarios with sub-cm glueball decay lengths. The measurement of top partner masses and couplings, which could be used to test the neutral naturalness mechanism directly, is also a tantalizing possibility.