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Testing the light dark matter scenario of the MSSM at the LHC | | Junjie Cao
; Yangle He
; Liangliang Shang
; Wei Su
; Yang Zhang
; | | Date: |
17 Nov 2015 | | Abstract: | In the light dark matter (DM) scenario of the MSSM, the DM relic density puts
non-trivial requirements on the spectrum of supersymmetric particles. As a
result, the direct search for multi-lepton signals at the LHC has great impact
on the scenario. In this work, we concentrate on the searches for sleptons and
electroweak-inos at the LHC, and investigate the constraints on the light DM
scenario from the 8 TeV LHC data as well as the capability of the 14 TeV LHC to
test the scenario. We first get the samples of the scenario by scanning the
vast parameter space of the MSSM and considering some easily available
constraints, such as those from the DM relic density, the LUX experiment and
the Higgs searches at colliders. Then for the surviving samples, we simulate
the $2l+E_T^{miss}$ signal from slepton pair production process and the
$2l+E_T^{miss}$ and $3l+E_T^{miss}$ signals from chargino and neutralino
associated production processes at both the 8 TeV LHC and the 14 TeV LHC. Our
simulations indicate that the 8 TeV LHC has excluded a sizable portion of the
samples, and the 14 TeV LHC can be even much more powerful in testing the
scenario. For example, in case that no multi-lepton signals are observed at the
14 TeV LHC, most samples of the light DM scenario will be excluded, especially
a lower limit on the lightest neutralino mass will be set at 42 GeV and 44 GeV
with 30 $fb^{-1}$ and 100 $fb^{-1}$ data respectively, and this limit can be
further pushed up to $55 {
m GeV}$ with 300 $fb^{-1}$ data. | | Source: | arXiv, 1511.5386 | | Services: | Forum | Review | PDF | Favorites | |
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