Hidden Higgs decaying to lepton jets
Hidden Higgs decaying to lepton jets
复制标题
DOI：
10.1007/jhep05(2010)077
复制
发表时间：
2010-02
影响因子：
5.4
通讯作者：
A. Falkowski;J. Ruderman;T. Volansky;J. Zupan
中科院分区：
文献类型：
--
作者：
A. Falkowski;J. Ruderman;T. Volansky;J. Zupan
希格斯粒子和一些标准模型超级伙伴可能是在LEP和Tevatron上大量产生的，而没有被发现。我们研究了一种新的情况，在这种情况下，希格斯衰变主要是直接或通过光SUSY态进入光隐藏扇区。随后的级联增加了隐藏扇区粒子的多样性，这些粒子在衰减回到标准模型后，在探测器中以被称为轻子喷注的准直轻子簇的形式出现。我们确定了表征这种情况的相关对撞机观测数据，并研究了广泛的LEP和Tevatron搜索，以恢复可观测数据空间中的可行区域。我们发现，当事件拓扑模拟强子背景时，衰变到轻子喷注的希格斯粒子可以被隐藏起来。因此，LEP和Tevatron数据中可能隐藏着多达104个轻子希格斯和超对称衰变。我们提供了100GeV希格斯粒子的基准模型，这些模型与所有可用的对撞机约束一致。最后，我们简短地讨论了在LEP、Tevatron和LHC进行专门搜索的策略，这些策略允许发现Higgs或SUSY粒子衰变到轻子喷流。
The Higgs and some of the Standard Model superpartners may have been copiously produced at LEP and the Tevatron without being detected. We study a novel scenario of this type in which the Higgs decays predominantly into a light hidden sector either directly or through light SUSY states. Subsequent cascades increase the multiplicity of hidden sector particles which, after decaying back into the Standard Model, appear in the detector as clusters of collimated leptons known as lepton jets. We identify the relevant collider observables that characterize this scenario, and study a wide range of LEP and Tevatron searches to recover the viable regions in the space of observables. We find that the Higgs decaying to lepton jets can be hidden when the event topology mimics that of hadronic backgrounds. Thus, as many as 10 4 leptonic Higgs and SUSY decays may be hiding in the LEP and Tevatron data. We present benchmark models with a 100 GeV Higgs that are consistent with all available collider constraints. We end with a short discussion of strategies for dedicated searches at LEP, the Tevatron and the LHC, that allow for a discovery of the Higgs or SUSY particles decaying to lepton jets.