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Detecting light stop pairs in coannihilation scenarios at the LHC
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abstract
In this work, we study the light stop pair signals at the large hadron collider (LHC) in three coannihilation scenarios. In order to yield the desired dark matter (DM) relic density, the neutralino can coannihilate with stop, chargino and stau, respectively. Signatures of the first scenario can be probed at the LHC via the associated jet production processes $pp \to j + {\tilde t} {\tilde t}^*$ by tagging an energetic mono-jet and a large missing transverse energy. The signatures of the other two scenarios can be searched via the pair production process $pp \to {\tilde t} {\tilde t}^*$ by tagging energetic b-jets in the final states and a large missing transverse energy. We find that the LHC results at 7 TeV with 5 $\mathrm{fb}^{-1}$ of data can exclude the stop mass up to 220, 380 and 220 GeV for these three scenarios, respectively. While the 20 $\mathrm{fb}^{-1}$ dataset at 8 TeV is considered, the LHC can be expected to exclude the stop mass up to 340, 430 and 370 GeV.
Forward citations
Cited by 1 Pith paper
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On the coverage of neutralino dark matter in coannihilations at the upgraded LHC
Projected HE-LHC searches could rule out neutralino dark matter up to 2.6, 1.7, and 0.8 TeV in gluino, stop, and wino coannihilation scenarios, but not in stau coannihilation.
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