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Search for supersymmetry in pp collisions at $ \sqrt{s}=13 $ TeV in the single-lepton final state using the sum of masses of large-radius jets

The CMS collaboration
JHEP 1608 (2016) 122, 2016

Abstract (data abstract)
CERN-LHC. Results are reported from a search for supersymmetric particles in proton-proton collisions in the final state with a single, high transverse momentum lepton; multiple jets, including at least one b-tagged jet; and large missing transverse momentum. The data sample corresponds to an integrated luminosity of 2.3 $\textrm{fb}^{-1}$ at $\sqrt{s}$ = 13 TeV, recorded by the CMS experiment at the LHC. The search focuses on processes leading to high jet multiplicities, such as gluino pair production with $\tilde{g} \rightarrow t \bar{t} \tilde{\chi}^0_1$. The quantity $M_J$, defined as the sum of the masses of the large-radius jets in the event, is used in conjunction with other kinematic variables to provide discrimination between signal and background and as a key part of the background estimation method. The observed event yields in the signal regions in data are consistent with those expected for standard model backgrounds, estimated from control regions in data. Exclusion limits are obtained for a simplified model corresponding to gluino pair production with three-body decays into top quarks and neutralinos. Gluinos with a mass below 1600 GeV are excluded at a 95% confidence level for scenarios with low $\tilde{\chi}^0_1$ mass, and neutralinos with a mass below 800 GeV are excluded for a gluino mass of about 1300 GeV. For models with two-body gluino decays producing on-shell top squarks, the excluded region is only weakly sensitive to the top squark mass.

  • Table 1

    Data from Table 1

    10.17182/hepdata.77195.v1/t1

    Event yields obtained from simulated event samples, as the event selection criteria are applied. The category Other includes Drell-Yan, $t\bar{t}H(\rightarrow...

  • Table 2

    Data from Table 3 (200<MET<400 GeV)

    10.17182/hepdata.77195.v1/t2

    Observed and predicted event yields for the signal regions (R4) and background regions (R1--R3) in data (2.3 $\textrm{fb}^{-1}$) in 200<MET<400...

  • Table 3

    Data from Table 3 (MET>400 GeV)

    10.17182/hepdata.77195.v1/t3

    Observed and predicted event yields for the signal regions (R4) and background regions (R1--R3) in data (2.3 $\textrm{fb}^{-1}$) in MET>400...

  • Table 4

    Data from Figure 10

    10.17182/hepdata.77195.v1/t4

    Interpretation of results in the T1tttt model. The colored regions show the upper limits (95\% CL) on the production cross...

  • Table 5

    Data from Figure 10

    10.17182/hepdata.77195.v1/t5

    Interpretation of results in the T1tttt model. The colored regions show the upper limits (95\% CL) on the production cross...

  • Table 6

    Data from Figure 10

    10.17182/hepdata.77195.v1/t6

    Interpretation of results in the T1tttt model. The colored regions show the upper limits (95\% CL) on the production cross...

  • Table 7

    Data from Figure 10

    10.17182/hepdata.77195.v1/t7

    Interpretation of results in the T1tttt model. The colored regions show the upper limits (95\% CL) on the production cross...

  • Table 8

    Data from Figure 10

    10.17182/hepdata.77195.v1/t8

    Interpretation of results in the T1tttt model. The colored regions show the upper limits (95\% CL) on the production cross...

  • Table 9

    Data from Figure 10

    10.17182/hepdata.77195.v1/t9

    Interpretation of results in the T1tttt model. The colored regions show the upper limits (95\% CL) on the production cross...

  • Table 10

    Data from Figure 10

    10.17182/hepdata.77195.v1/t10

    Interpretation of results in the T1tttt model. The colored regions show the upper limits (95\% CL) on the production cross...

  • Table 11

    Data from Figure 11

    10.17182/hepdata.77195.v1/t11

    Observed excluded region (95\% CL), shown in blue, in the $m_{\tilde{g}}$-$m_{\tilde{\chi}^0_1}$ plane for a model combining T5tttt, gluino pair production,...

  • Table 12

    Data from Figure 11

    10.17182/hepdata.77195.v1/t12

    Expected excluded region (95\% CL), shown in blue, in the $m_{\tilde{g}}$-$m_{\tilde{\chi}^0_1}$ plane for a model combining T5tttt, gluino pair production,...

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