SUSY挖掘出埋藏的希格斯粒子
SUSY Digs up a Buried Higgs
摘要：
希格斯玻色子可能会通过一个轻的赝标量中介衰变为4个光喷流：h -> 2 eta -> 4j，这使得在大型强子对撞机上进行重建特别具有挑战性。我们探讨这种“掩埋希格斯”的情况下，希格斯粒子的主要发现渠道是在级联衰变的超伙伴的现象学。高p_T喷注和大的缺失横动量是TeV尺度超对称性的典型特征，这两个特征抑制了原本会压倒Higgs衰变的QCD背景。利用喷流子结构技术，我们发现，对于100-120 GeV范围内的掩埋Higgses，在E_CM = 14 TeV时，大约有10-25个倒fb的数据，可以预期有一个5 σ的发现。对于较轻的希格斯玻色子玻色子，信号被强子衰变的W玻色子污染，发现仍然是一个未解决的挑战。
英文摘要：
The Higgs boson may dominantly decay to 4 light jets through a light pseudo-scalar intermediary: h -> 2 eta -> 4j, making reconstruction at the LHC particularly challenging. We explore the phenomenology of such "Buried Higgs" scenarios in which the primary discovery channel of the Higgs is in cascade decays of superpartners. QCD backgrounds that would otherwise overwhelm the Higgs decay are suppressed by the requirement of high p_T jets and large missing transverse momentum that are the typical signatures of TeV scale supersymmetry. Utilizing jet substructure techniques, we find that for buried Higgses in the 100-120 GeV range, a 5-sigma discovery can be expected with roughly 10-25 inverse fb of data at E_CM = 14 TeV. For lighter Higgs bosons, the signal is contaminated by hadronically decaying W bosons, and discovery remains an unsolved challenge.
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