How low can SUSY go? Matching, monojets and compressed spectra
How low can SUSY go? Matching, monojets and compressed spectra
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SUSY 能走多低？
DOI：
10.1209/0295-5075/99/61001
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
J. Tattersall
中科院分区：
文献类型：
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作者：
H. Dreiner;M. Krämer;J. Tattersall
如果超对称（SUSY）有一个压缩的谱，那么LHC目前的质量限制可以大大降低。我们考虑了一种可能的“最坏情况”，即胶子和/或夸克与最轻的SUSY粒子（LSP）简并。对这些压缩光谱最敏感的搜索是通过最终状态lsp对初始状态辐射（ISR）的反冲。我们将矩阵元素与部子簇相匹配，以准确地模拟ISR。利用现有的所有LHC超对称性和单射流分析，我们发现，对于一个由LSP和解耦胶子组成的夸克简并的场景，340\,{GeV}$ ？对于用LSP和解耦的方克退化的胶子，500\,\textrm {GeV}$ ?>。最后，对于等质量的夸克和胶子，用LSP进行简并，650\,\textrm {GeV}$ ？
If supersymmetry (SUSY) has a compressed spectrum then the current mass limits from the LHC can be drastically reduced. We consider a possible “worst case” scenario where the gluino and/or squarks are degenerate with the lightest SUSY particle (LSP). The most sensitive searches for these compressed spectra are via the final state LSPs recoiling against initial state radiation (ISR). We match the matrix element to the parton shower to accurately model the ISR. All current LHC SUSY and monojet analyses are employed and we find that for a scenario where the squarks are degenerate with the LSP and decoupled gluinos, 340\,\textrm {GeV}$ ?>. For gluinos degenerate with the LSP and decoupled squarks, 500\,\textrm {GeV}$ ?>. Finally, for equal-mass squarks and gluinos degenerate with the LSP, 650\,\textrm {GeV}$ ?>.