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Search for gluinos in events with an isolated lepton, jets and missing transverse momentum at $\sqrt{s}$ = 13 TeV with the ATLAS detector

The ATLAS collaboration
No Journal Information, 2016

Abstract (data abstract)
CERN-LHC. The results of a search for gluinos in final states with an isolated electron or muon, multiple jets and large missing transverse momentum using proton--proton collision data at a centre-of-mass energy of $\sqrt{s}$ = 13 TeV are presented. The dataset used was recorded in 2015 by the ATLAS experiment at the Large Hadron Collider and corresponds to an integrated luminosity of 3.2 fb$^{-1}$. Six signal selections are defined that best exploit the signal characteristics. The data agree with the Standard Model background expectation in all six signal selections, and the largest deviation is a 2.1 standard deviation excess. The results are interpreted in a simplified model where pair-produced gluinos decay via the lightest chargino to the lightest neutralino. In this model, gluinos are excluded up to masses of approximately 1.6 TeV depending on the mass spectrum of the simplified model, thus surpassing the limits of previous searches.

  • Table 1

    Data from Figure 3a

    10.17182/hepdata.73806.v1/t1

    The distribution of the missing transverse momentum is shown in hard-lepton 6-jet ttbar control regions after normalising the ttbar and...

  • Table 2

    Data from Figure 3b

    10.17182/hepdata.73806.v1/t2

    The distribution of the missing transverse momentum is shown in hard-lepton 6-jet W+jets control regions after normalising the ttbar and...

  • Table 3

    Data from Figure 3c

    10.17182/hepdata.73806.v1/t3

    The distribution of the missing transverse momentum is shown in soft-lepton 2-jet ttbar control regions after normalising the ttbar and...

  • Table 4

    Data from Figure 3d

    10.17182/hepdata.73806.v1/t4

    The distribution of the missing transverse momentum is shown in soft-lepton 2-jet W+jets control regions after normalising the ttbar and...

  • Table 5

    Data from Figure 4a

    10.17182/hepdata.73806.v1/t5

    Expected background yields as obtained in the background-only fits in all hard-lepton and soft-lepton validation together with observed data are...

  • Table 6

    Data from Figure 4b

    10.17182/hepdata.73806.v1/t6

    Expected background yields as obtained in the background-only fits in all hard-lepton and soft-lepton signal together with observed data are...

  • Table 7

    Data from Figure 5a

    10.17182/hepdata.73806.v1/t7

    Distributions of mt for the hard-lepton 4-jet low-x signal region. The requirement on the variable plotted is removed from the...

  • Table 8

    Data from Figure 5b

    10.17182/hepdata.73806.v1/t8

    Distributions of met/meff for the 4-jet high-x signal region. The requirement on the variable plotted is removed from the definitions...

  • Table 9

    Data from Figure 5c

    10.17182/hepdata.73806.v1/t9

    Distributions of mt for the hard-lepton 5-jet signal region. The requirement on the variable plotted is removed from the definitions...

  • Table 10

    Data from Figure 5d

    10.17182/hepdata.73806.v1/t10

    Distributions of mt for the hard-lepton 6-jet signal region. The requirement on the variable plotted is removed from the definitions...

  • Table 11

    Data from Figure 5e

    10.17182/hepdata.73806.v1/t11

    Distributions of met for the soft-lepton 2-jet signal region. The requirement on the variable plotted is removed from the definitions...

  • Table 12

    Data from Figure 5f

    10.17182/hepdata.73806.v1/t12

    Distributions of met for the soft-lepton 5-jet signal region. The requirement on the variable plotted is removed from the definitions...

  • Table 13

    Data from Figure 6a

    10.17182/hepdata.73806.v1/t13

    The observed combined 95% CL exclusion limits in the the gluino simplified models using for each model point the signal...

  • Table 14

    Data from Figure 6a

    10.17182/hepdata.73806.v1/t14

    The expected combined 95% CL exclusion limits in the the gluino simplified models using for each model point the signal...

  • Table 15

    Data from Figure 6a

    10.17182/hepdata.73806.v1/t15

    The yellow band ($+ 1 \sigma$) of the combined 95% CL exclusion limits in the the gluino simplified models using...

  • Table 16

    Data from Figure 6a

    10.17182/hepdata.73806.v1/t16

    The yellow band ($- 1 \sigma$) of the combined 95% CL exclusion limits in the the gluino simplified models using...

  • Table 17

    Data from Figure 6b

    10.17182/hepdata.73806.v1/t17

    The observed combined 95% CL exclusion limits in the the gluino simplified models using for each model point the signal...

  • Table 18

    Data from Figure 6b

    10.17182/hepdata.73806.v1/t18

    The expected combined 95% CL exclusion limits in the the gluino simplified models using for each model point the signal...

  • Table 19

    Data from Figure 6b

    10.17182/hepdata.73806.v1/t19

    The yellow band ($+ 1 \sigma$) of the combined 95% CL exclusion limits in the the gluino simplified models using...

  • Table 20

    Data from Figure 6b

    10.17182/hepdata.73806.v1/t20

    The yellow band ($- 1 \sigma$) of the combined 95% CL exclusion limits in the the gluino simplified models using...

  • Table 21

    Data from Auxiliary Figure 1a

    10.17182/hepdata.73806.v1/t21

    The observed limits for the soft-lepton 2-jet signal region. The limits are presented in the (gluino, chargino) mass plane for...

  • Table 22

    Data from Auxiliary Figure 1a

    10.17182/hepdata.73806.v1/t22

    The expected limits for the soft-lepton 2-jet signal region. The limits are presented in the (gluino, chargino) mass plane for...

  • Table 23

    Data from Auxiliary Figure 1a

    10.17182/hepdata.73806.v1/t23

    The observed limits for the hard-lepton 4-jet low-x signal region. The limits are presented in the (gluino, chargino) mass plane...

  • Table 24

    Data from Auxiliary Figure 1a

    10.17182/hepdata.73806.v1/t24

    The expected limits for the hard-lepton 4-jet low-x signal region. The limits are presented in the (gluino, chargino) mass plane...

  • Table 25

    Data from Auxiliary Figure 1a

    10.17182/hepdata.73806.v1/t25

    The observed limits for the hard-lepton 5-jet signal region. The limits are presented in the (gluino, chargino) mass plane for...

  • Table 26

    Data from Auxiliary Figure 1a

    10.17182/hepdata.73806.v1/t26

    The expected limits for the hard-lepton 5-jet signal region. The limits are presented in the (gluino, chargino) mass plane for...

  • Table 27

    Data from Auxiliary Figure 1a

    10.17182/hepdata.73806.v1/t27

    The observed limits for the hard-lepton 6-jet signal region. The limits are presented in the (gluino, chargino) mass plane for...

  • Table 28

    Data from Auxiliary Figure 1a

    10.17182/hepdata.73806.v1/t28

    The expected limits for the hard-lepton 6-jet signal region. The limits are presented in the (gluino, chargino) mass plane for...

  • Table 29

    Data from Auxiliary Figure 1b

    10.17182/hepdata.73806.v1/t29

    The observed limits for the soft-lepton 5-jet signal region. The limits are presented in the (gluino, x) plane for the...

  • Table 30

    Data from Auxiliary Figure 1b

    10.17182/hepdata.73806.v1/t30

    The expected limits for the soft-lepton 5-jet signal region. The limits are presented in the (gluino, x) plane for the...

  • Table 31

    Data from Auxiliary Figure 1b

    10.17182/hepdata.73806.v1/t31

    The observed limits for the hard-lepton 4-jet low-x signal region. The limits are presented in the (gluino, x) plane for...

  • Table 32

    Data from Auxiliary Figure 1b

    10.17182/hepdata.73806.v1/t32

    The expected limits for the hard-lepton 4-jet low-x signal region. The limits are presented in the (gluino, x) plane for...

  • Table 33

    Data from Auxiliary Figure 1b

    10.17182/hepdata.73806.v1/t33

    The observed limits for the hard-lepton 4-jet high-x signal region. The limits are presented in the (gluino, x) plane for...

  • Table 34

    Data from Auxiliary Figure 1b

    10.17182/hepdata.73806.v1/t34

    The expected limits for the hard-lepton 4-jet high-x signal region. The limits are presented in the (gluino, x) plane for...

  • Table 35

    Data from Auxiliary Figure 1b

    10.17182/hepdata.73806.v1/t35

    The observed limits for the hard-lepton 5-jet signal region. The limits are presented in the (gluino, x) plane for the...

  • Table 36

    Data from Auxiliary Figure 1b

    10.17182/hepdata.73806.v1/t36

    The expected limits for the hard-lepton 5-jet signal region. The limits are presented in the (gluino, x) plane for the...

  • Table 37

    Data from Auxiliary Figure 1b

    10.17182/hepdata.73806.v1/t37

    The observed limits for the hard-lepton 6-jet signal region. The limits are presented in the (gluino, x) plane for the...

  • Table 38

    Data from Auxiliary Figure 1b

    10.17182/hepdata.73806.v1/t38

    The expected limits for the hard-lepton 6-jet signal region. The limits are presented in the (gluino, x) plane for the...

  • Table 39

    Data from Auxiliary Figure 5a

    10.17182/hepdata.73806.v1/t39

    Number of generated events in the (gluino, chargino) mass plane for the scenario where the mass of the chargino is...

  • Table 40

    Data from Auxiliary Figure 5b

    10.17182/hepdata.73806.v1/t40

    Number of generated events in the (gluino, x) plane for the chargino = 60 GeV models.

  • Table 41

    Data from Auxiliary Figure 6a

    10.17182/hepdata.73806.v1/t41

    Production cross-section in the (gluino, chargino) mass plane for the scenario where the mass of the chargino is fixed to...

  • Table 42

    Data from Auxiliary Figure 6b

    10.17182/hepdata.73806.v1/t42

    Production cross-section in the (gluino, x) plane for the chargino = 60 GeV models.

  • Table 43

    Data from Auxiliary Figure 7a

    10.17182/hepdata.73806.v1/t43

    Acceptance times efficiency obtained in the different signal regions in the (gluino, chargino) mass plane for the scenario where the...

  • Table 44

    Data from Auxiliary Figure 7b

    10.17182/hepdata.73806.v1/t44

    Acceptance times efficiency in the different signal regions in the (gluino, chargino) mass plane for the scenario where the mass...

  • Table 45

    Data from Auxiliary Figure 7c

    10.17182/hepdata.73806.v1/t45

    Acceptance times efficiency in the different signal regions in the (gluino, chargino) mass plane for the scenario where the mass...

  • Table 46

    Data from Auxiliary Figure 7d

    10.17182/hepdata.73806.v1/t46

    Acceptance times efficiency in the different signal regions in the (gluino, chargino) mass plane for the scenario where the mass...

  • Table 47

    Data from Auxiliary Figure 7e

    10.17182/hepdata.73806.v1/t47

    Acceptance times efficiency in the different signal regions in the (gluino, chargino) mass plane for the scenario where the mass...

  • Table 48

    Data from Auxiliary Figure 8a

    10.17182/hepdata.73806.v1/t48

    Acceptance times efficiency obtained in the different signal regions in the (gluino, x) plane for the chargino = 60 GeV...

  • Table 49

    Data from Auxiliary Figure 8b

    10.17182/hepdata.73806.v1/t49

    Acceptance times efficiency in the different signal regions in the (gluino, x) plane for the chargino = 60 GeV models...

  • Table 50

    Data from Auxiliary Figure 8c

    10.17182/hepdata.73806.v1/t50

    Acceptance times efficiency in the different signal regions in the (gluino, x) plane for the chargino = 60 GeV models...

  • Table 51

    Data from Auxiliary Figure 8d

    10.17182/hepdata.73806.v1/t51

    Acceptance times efficiency in the different signal regions in the (gluino, x) plane for the chargino = 60 GeV models...

  • Table 52

    Data from Auxiliary Figure 8e

    10.17182/hepdata.73806.v1/t52

    Acceptance times efficiency in the different signal regions in the (gluino, x) plane for the chargino = 60 GeV models...

  • Table 53

    Data from Auxiliary Figure 9a

    10.17182/hepdata.73806.v1/t53

    The observed CLs values as obtained in the different signal regions in the (gluino, chargino) mass plane for the scenario...

  • Table 54

    Data from Auxiliary Figure 9b

    10.17182/hepdata.73806.v1/t54

    The observed CLs values as obtained in the different signal regions in the (gluino, chargino) mass plane for the scenario...

  • Table 55

    Data from Auxiliary Figure 9c

    10.17182/hepdata.73806.v1/t55

    The observed CLs values as obtained in the different signal regions in the (gluino, chargino) mass plane for the scenario...

  • Table 56

    Data from Auxiliary Figure 9d

    10.17182/hepdata.73806.v1/t56

    The observed CLs values as obtained in the different signal regions in the (gluino, chargino) mass plane for the scenario...

  • Table 57

    Data from Auxiliary Figure 9e

    10.17182/hepdata.73806.v1/t57

    The observed CLs values as obtained in the different signal regions in the (gluino, chargino) mass plane for the scenario...

  • Table 58

    Data from Auxiliary Figure 10a

    10.17182/hepdata.73806.v1/t58

    The expected CLs values as obtained in the different signal regions in the (gluino, chargino) mass plane for the scenario...

  • Table 59

    Data from Auxiliary Figure 10b

    10.17182/hepdata.73806.v1/t59

    The expected CLs values as obtained in the different signal regions in the (gluino, chargino) mass plane for the scenario...

  • Table 60

    Data from Auxiliary Figure 10c

    10.17182/hepdata.73806.v1/t60

    The expected CLs values as obtained in the different signal regions in the (gluino, chargino) mass plane for the scenario...

  • Table 61

    Data from Auxiliary Figure 10d

    10.17182/hepdata.73806.v1/t61

    The expected CLs values as obtained in the different signal regions in the (gluino, chargino) mass plane for the scenario...

  • Table 62

    Data from Auxiliary Figure 10e

    10.17182/hepdata.73806.v1/t62

    The expected CLs values as obtained in the different signal regions in the (gluino, chargino) mass plane for the scenario...

  • Table 63

    Data from Auxiliary Figure 11a

    10.17182/hepdata.73806.v1/t63

    The observed CLs values as obtained in the different signal regions in the (gluino, x) plane for the chargino =...

  • Table 64

    Data from Auxiliary Figure 11b

    10.17182/hepdata.73806.v1/t64

    The observed CLs values as obtained in the different signal regions in the (gluino, x) plane for the chargino =...

  • Table 65

    Data from Auxiliary Figure 11c

    10.17182/hepdata.73806.v1/t65

    The observed CLs values as obtained in the different signal regions in the (gluino, x) plane for the chargino =...

  • Table 66

    Data from Auxiliary Figure 11d

    10.17182/hepdata.73806.v1/t66

    The observed CLs values as obtained in the different signal regions in the (gluino, x) plane for the chargino =...

  • Table 67

    Data from Auxiliary Figure 11e

    10.17182/hepdata.73806.v1/t67

    The observed CLs values as obtained in the different signal regions in the (gluino, x) plane for the chargino =...

  • Table 68

    Data from Auxiliary Figure 12a

    10.17182/hepdata.73806.v1/t68

    The expected CLs values as obtained in the different signal regions in the (gluino, x) plane for the chargino =...

  • Table 69

    Data from Auxiliary Figure 12b

    10.17182/hepdata.73806.v1/t69

    The expected CLs values as obtained in the different signal regions in the (gluino, x) plane for the chargino =...

  • Table 70

    Data from Auxiliary Figure 12c

    10.17182/hepdata.73806.v1/t70

    The expected CLs values as obtained in the different signal regions in the (gluino, x) plane for the chargino =...

  • Table 71

    Data from Auxiliary Figure 12d

    10.17182/hepdata.73806.v1/t71

    The expected CLs values as obtained in the different signal regions in the (gluino, x) plane for the chargino =...

  • Table 72

    Data from Auxiliary Figure 12e

    10.17182/hepdata.73806.v1/t72

    The expected CLs values as obtained in the different signal regions in the (gluino, x) plane for the chargino =...

  • Table 73

    Data from Auxiliary Figure 13a

    10.17182/hepdata.73806.v1/t73

    The signal region yielding in the best expected limit is indicated for every signal point used in the the gluino...

  • Table 74

    Data from Auxiliary Figure 13b

    10.17182/hepdata.73806.v1/t74

    The signal region yielding in the best expected limit is indicated for every signal point used in the the gluino...

  • Table 75

    Data from Auxiliary Figure 14a

    10.17182/hepdata.73806.v1/t75

    Model-dependent 95% CL upper limits on the visible cross-section in addition to the observed and expected exclusion limits for the...

  • Table 76

    Data from Auxiliary Figure 14b

    10.17182/hepdata.73806.v1/t76

    Model-dependent 95% CL upper limits on the visible cross-section in addition to the observed and expected exclusion limits for the...

  • Table 77

    Data from Table 1

    10.17182/hepdata.73806.v1/t77

    Simulated background event samples: the corresponding generator, parton shower, cross-section normalisation, PDF set and underlying-event tune are shown.

  • Table 78

    Data from Table 2

    10.17182/hepdata.73806.v1/t78

    Overview of the selection criteria for the soft-lepton signal regions. The symbol $p_{T}^{l}$ refers to signal leptons.

  • Table 79

    Data from Table 3

    10.17182/hepdata.73806.v1/t79

    Overview of the selection criteria for the hard-lepton signal regions. The symbol $p_{T}^{l}$ refers to signal leptons.

  • Table 80

    Data from Table 4

    10.17182/hepdata.73806.v1/t80

    Background fit results for the hard-lepton and soft-lepton signal regions, for an integrated luminosity of 3.2 fb-1. Uncertainties in the...

  • Table 81

    Data from Table 5

    10.17182/hepdata.73806.v1/t81

    Breakdown of upper limits. The columns show from left to right: the name of the respective signal region; the 95%...

  • Table 82

    Data from Auxiliary Table 1

    10.17182/hepdata.73806.v1/t82

    Table shows the data, fitted background and expected signal event counts for a benchmark signal point in each bin of...

  • Table 83

    Data from Auxiliary Table 2

    10.17182/hepdata.73806.v1/t83

    Table shows the data, fitted background and expected signal event counts for a benchmark signal point in each bin of...

  • Table 84

    Data from Auxiliary Table 3

    10.17182/hepdata.73806.v1/t84

    Table shows the data, fitted background and expected signal event counts for a benchmark signal point in each bin of...

  • Table 85

    Data from Auxiliary Table 4

    10.17182/hepdata.73806.v1/t85

    Table shows the data, fitted background and expected signal event counts for a benchmark signal point in each bin of...

  • Table 86

    Data from Auxiliary Table 5

    10.17182/hepdata.73806.v1/t86

    Table shows the data, fitted background and expected signal event counts for a benchmark signal point in each bin of...

  • Table 87

    Data from Auxiliary Table 6

    10.17182/hepdata.73806.v1/t87

    Table shows the data, fitted background and expected signal event counts for a benchmark signal point in each bin of...

  • Table 88

    Data from Auxiliary Table 7

    10.17182/hepdata.73806.v1/t88

    Cutflow table for the hard-lepton signal regions with representative target signal models. The weighted numbers are normalized to 3.2 fb-1...

  • Table 89

    Data from Auxiliary Table 8

    10.17182/hepdata.73806.v1/t89

    Cutflow table for the hard-lepton signal regions with representative target signal models. The weighted numbers are normalized to 3.2 fb-1...

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