Hide and seek with natural supersymmetry at the LHC
Hide and seek with natural supersymmetry at the LHC
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DOI：
10.1007/jhep05(2012)062
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发表时间：
2012-05-01
影响因子：
5.4
通讯作者：
Gripaios, Ben
中科院分区：
文献类型：
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作者：
Allanach, B. C.;Gripaios, Ben
在2011年的搜索中，如果胶子的质量小于800 GeV，那么它就会在LHC中导致经典的大的横向动量信号丢失。这就增加了实验和自然性问题的超对称解之间的张力，因为如果电弱标度是自然的，那么胶子就必须是轻的。在这里，我们研究自然的情况下，超对称性是存在的，但隐藏在2011年的搜索，由于违反R-宇称和缺乏一个大的失踪的横向动量签名。自然性表明，第三代国家应占主导地位的胶子衰变，我们认为，这导致了一个通用的签名的形式相同的符号，味道矛盾轻子，没有大的失踪横向动量。因此，在这个通道中的搜索能够覆盖广泛的场景，具有一定的普遍性，人们应该寻找以这种方式衰变的质量低于TeV的胶子。我们鼓励大型强子对撞机实验以这种形式来寻找超对称性。我们考虑一个特殊的情况下，是善于隐藏：重子数违反，并估计，从2011年的数据最具约束力的现有搜索意味着550 GeV的胶子质量的下限。
Gluinos that result in classic large missing transverse momentum signatures at the LHC have been excluded by 2011 searches if they are lighter than around 800GeV. This adds to the tension between experiment and supersymmetric solutions of the naturalness problem, since the gluino is required to be light if the electroweak scale is to be natural. Here, we examine natural scenarios where supersymmetry is present, but has hidden from 2011 searches due to violation of R-parity and the absence of a large missing transverse momentum signature. Naturalness suggests that third generation states should dominate gluino decays and we argue that this leads to a generic signature in the form of samesign, flavour-ambivalent leptons, without large missing transverse momentum. As a result, searches in this channel are able to cover a broad range of scenarios with some generality and one should seek gluinos that decay in this way with masses below a TeV. We encourage the LHC experiments to tailor a search for supersymmetry in this form. We consider a specific case that is good at hiding: baryon number violation, and estimate that the most constraining existing search from 2011 data implies a lower bound on the gluino mass of 550GeV.