科研之友
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摘要
If supersymmetry (SUSY) has a compressed spectrum then the current mass limits from the LHC can be drastically reduced. We consider a possible %26quot;worst case%26quot; 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, M-(q) over bar %26gt; 340 GeV. For gluinos degenerate with the LSP and decoupled squarks, M-(g) over bar %26gt; 500 GeV. Finally, for equal-mass squarks and gluinos degenerate with the LSP, M-(q) over bar,M-(g) over bar %26gt; 650 GeV.
- 出版日期2012-9
