A search for $B-L$ $R$-parity-violating top squarks in $\sqrt{s} = 13$ TeV $pp$ collisions with the ATLAS experiment

The ATLAS collaboration
No Journal Information, 2017

Abstract
A search is presented for the direct pair production of the stop, the supersymmetric partner of the top quark, that decays through an $R$-parity-violating coupling to a final state with two leptons and two jets, at least one of which is identified as a $b$-jet. The dataset corresponds to an integrated luminosity of 36.1 fb$^{-1}$ of proton-proton collisions at a center-of-mass energy of $\sqrt{s} = 13$ TeV, collected in 2015 and 2016 by the ATLAS detector at the LHC. No significant excess is observed over the Standard Model background, and exclusion limits are set on stop pair production at a 95% confidence level. Lower limits on the stop mass are set between 600 GeV and 1.5 TeV for branching ratios above 10% for decays to an electron or muon and a $b$-quark.

  • Expected Contour 1

    Data from Figure 6, Auxiliary Figure 2a

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    Expected exclusion limit contour in the (BRe,BRtau) plane for a 600 GeV stop. All limits are computed at 95% CL.

  • Observed Contour 1

    Data from Figure 6, Auxiliary Figure 2a

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    Observed exclusion limit contour in the (BRe,BRtau) plane for a 600 GeV stop. All limits are computed at 95% CL.

  • Expected Contour 2

    Data from Auxiliary Figure 3a

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    Expected exclusion limit contour in the (BRe,BRtau) plane for a 700 GeV stop. All limits are computed at 95% CL.

  • Observed Contour 2

    Data from Auxiliary Figure 3a

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    Observed exclusion limit contour in the (BRe,BRtau) plane for a 700 GeV stop. All limits are computed at 95% CL.

  • Expected Contour 3

    Data from Auxiliary Figure 4a

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    Expected exclusion limit contour in the (BRe,BRtau) plane for a 800 GeV stop. All limits are computed at 95% CL.

  • Observed Contour 3

    Data from Auxiliary Figure 4a

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    Observed exclusion limit contour in the (BRe,BRtau) plane for a 800 GeV stop. All limits are computed at 95% CL.

  • Expected Contour 4

    Data from Figure 6, Auxiliary Figure 5a

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    Expected exclusion limit contour in the (BRe,BRtau) plane for a 900 GeV stop. All limits are computed at 95% CL.

  • Observed Contour 4

    Data from Figure 6, Auxiliary Figure 5a

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    Observed exclusion limit contour in the (BRe,BRtau) plane for a 900 GeV stop. All limits are computed at 95% CL.

  • Expected Contour 5

    Data from Figure 6, Auxiliary Figure 6a

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    Expected exclusion limit contour in the (BRe,BRtau) plane for a 1000 GeV stop. All limits are computed at 95% CL.

  • Observed Contour 5

    Data from Figure 6, Auxiliary Figure 6a

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    Observed exclusion limit contour in the (BRe,BRtau) plane for a 1000 GeV stop. All limits are computed at 95% CL.

  • Expected Contour 6

    Data from Auxiliary Figure 7a

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    Expected exclusion limit contour in the (BRe,BRtau) plane for a 1050 GeV stop. All limits are computed at 95% CL.

  • Observed Contour 6

    Data from Auxiliary Figure 7a

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    Observed exclusion limit contour in the (BRe,BRtau) plane for a 1050 GeV stop. All limits are computed at 95% CL.

  • Expected Contour 7

    Data from Figure 6, Auxiliary Figure 8a

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    Expected exclusion limit contour in the (BRe,BRtau) plane for a 1100 GeV stop. All limits are computed at 95% CL.

  • Observed Contour 7

    Data from Figure 6, Auxiliary Figure 8a

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    Observed exclusion limit contour in the (BRe,BRtau) plane for a 1100 GeV stop. All limits are computed at 95% CL.

  • Expected Contour 8

    Data from Auxiliary Figure 9a

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    Expected exclusion limit contour in the (BRe,BRtau) plane for a 1150 GeV stop. All limits are computed at 95% CL.

  • Observed Contour 8

    Data from Auxiliary Figure 9a

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    Observed exclusion limit contour in the (BRe,BRtau) plane for a 1150 GeV stop. All limits are computed at 95% CL.

  • Expected Contour 9

    Data from Figure 6, Auxiliary Figure 10a

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    Expected exclusion limit contour in the (BRe,BRtau) plane for a 1200 GeV stop. All limits are computed at 95% CL.

  • Observed Contour 9

    Data from Figure 6, Auxiliary Figure 10a

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    Observed exclusion limit contour in the (BRe,BRtau) plane for a 1200 GeV stop. All limits are computed at 95% CL.

  • Expected Contour 10

    Data from Auxiliary Figure 11a

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    Expected exclusion limit contour in the (BRe,BRtau) plane for a 1250 GeV stop. All limits are computed at 95% CL.

  • Observed Contour 10

    Data from Auxiliary Figure 11a

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    Observed exclusion limit contour in the (BRe,BRtau) plane for a 1250 GeV stop. All limits are computed at 95% CL.

  • Expected Contour 11

    Data from Figure 6, Auxiliary Figure 12a

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    Expected exclusion limit contour in the (BRe,BRtau) plane for a 1300 GeV stop. All limits are computed at 95% CL.

  • Observed Contour 11

    Data from Figure 6, Auxiliary Figure 12a

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    Observed exclusion limit contour in the (BRe,BRtau) plane for a 1300 GeV stop. All limits are computed at 95% CL.

  • Expected Contour 12

    Data from Auxiliary Figure 13a

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    Expected exclusion limit contour in the (BRe,BRtau) plane for a 1350 GeV stop. All limits are computed at 95% CL.

  • Observed Contour 12

    Data from Auxiliary Figure 13a

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    Observed exclusion limit contour in the (BRe,BRtau) plane for a 1350 GeV stop. All limits are computed at 95% CL.

  • Expected Contour 13

    Data from Figure 6, Auxiliary Figure 14a

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    Expected exclusion limit contour in the (BRe,BRtau) plane for a 1400 GeV stop. All limits are computed at 95% CL.

  • Observed Contour 13

    Data from Figure 6, Auxiliary Figure 14a

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    Observed exclusion limit contour in the (BRe,BRtau) plane for a 1400 GeV stop. All limits are computed at 95% CL.

  • Expected Contour 14

    Data from Auxiliary Figure 15a

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    Expected exclusion limit contour in the (BRe,BRtau) plane for a 1450 GeV stop. All limits are computed at 95% CL.

  • Observed Contour 14

    Data from Auxiliary Figure 15a

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    Observed exclusion limit contour in the (BRe,BRtau) plane for a 1450 GeV stop. All limits are computed at 95% CL.

  • Expected Contour 15

    Data from Figure 6, Auxiliary Figure 16a

    10.17182/hepdata.78376.v3/t29

    Expected exclusion limit contour in the (BRe,BRtau) plane for a 1500 GeV stop. All limits are computed at 95% CL.

  • Observed Contour 15

    Data from Figure 6, Auxiliary Figure 16a

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    Observed exclusion limit contour in the (BRe,BRtau) plane for a 1500 GeV stop. All limits are computed at 95% CL.

  • Acceptance 1

    Data from Auxiliary Figure 19a

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    Signal acceptance (in %) in the (BRe,BRtau) plane for a 800 GeV stop, for the SR800 signal region.

  • Acceptance 2

    Data from Auxiliary Figure 19b

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    Signal acceptance (in %) in the (BRe,BRtau) plane for a 800 GeV stop, for the SR1100 signal region.

  • Efficiency 1

    Data from Auxiliary Figure 19c

    10.17182/hepdata.78376.v3/t33

    Signal efficiency (in %) in the (BRe,BRtau) plane for a 800 GeV stop, for the SR800 signal region.

  • Efficiency 2

    Data from Auxiliary Figure 19d

    10.17182/hepdata.78376.v3/t34

    Signal efficiency (in %) in the (BRe,BRtau) plane for a 800 GeV stop, for the SR1100 signal region.

  • Acceptance 3

    Data from Auxiliary Figure 20a

    10.17182/hepdata.78376.v3/t35

    Signal acceptance (in %) in the (BRe,BRtau) plane for a 1200 GeV stop, for the SR800 signal region.

  • Acceptance 4

    Data from Auxiliary Figure 20b

    10.17182/hepdata.78376.v3/t36

    Signal acceptance (in %) in the (BRe,BRtau) plane for a 1200 GeV stop, for the SR1100 signal region.

  • Efficiency 3

    Data from Auxiliary Figure 20c

    10.17182/hepdata.78376.v3/t37

    Signal efficiency (in %) in the (BRe,BRtau) plane for a 1200 GeV stop, for the SR800 signal region.

  • Efficiency 4

    Data from Auxiliary Figure 20d

    10.17182/hepdata.78376.v3/t38

    Signal efficiency (in %) in the (BRe,BRtau) plane for a 1200 GeV stop, for the SR1100 signal region.

  • Acceptance 5

    Data from Auxiliary Figure 21a

    10.17182/hepdata.78376.v3/t39

    Signal acceptance (in %) in the (BRe,BRtau) plane for a 1500 GeV stop, for the SR800 signal region.

  • Acceptance 6

    Data from Auxiliary Figure 21b

    10.17182/hepdata.78376.v3/t40

    Signal acceptance (in %) in the (BRe,BRtau) plane for a 1500 GeV stop, for the SR1100 signal region.

  • Efficiency 5

    Data from Auxiliary Figure 21c

    10.17182/hepdata.78376.v3/t41

    Signal efficiency (in %) in the (BRe,BRtau) plane for a 1500 GeV stop, for the SR800 signal region.

  • Efficiency 6

    Data from Auxiliary Figure 21d

    10.17182/hepdata.78376.v3/t42

    Signal efficiency (in %) in the (BRe,BRtau) plane for a 1500 GeV stop, for the SR1100 signal region.

  • SR distribution 1

    Data from Figure 02a

    10.17182/hepdata.78376.v3/t43

    $m_{bl}^{0}$ distribution in SR800. All selection criteria are applied, except the selection on the variable that is displayed in the...

  • SR distribution 2

    Data from Figure 02b

    10.17182/hepdata.78376.v3/t44

    $m_{bl}^\mathrm{asym}$ distribution in SR800. All selection criteria are applied, except the selection on the variable that is displayed in the...

  • SR distribution 3

    Data from Figure 02c

    10.17182/hepdata.78376.v3/t45

    $H_\mathrm{T}$ distribution in SR800. All selection criteria are applied, except the selection on the variable that is displayed in the...

  • SR distribution 4

    Data from Figure 02d

    10.17182/hepdata.78376.v3/t46

    $m_{ll}$ distribution in SR800. All selection criteria are applied, except the selection on the variable that is displayed in the...

  • SR distribution 5

    Data from Figure 02e

    10.17182/hepdata.78376.v3/t47

    $m_{bl}^{1}$(rej) distribution in SR800. All selection criteria are applied, except the selection on the variable that is displayed in the...

  • Table 1

    Data from Auxiliary Cutflow Table 1

    10.17182/hepdata.78376.v3/t48

    Full list of event selections and MC generator-weighted yields and efficiencies in the inclusive SR800 and SR1100 signal regions for...

  • Cross Section Limit 1

    Data from Auxiliary Figure 2b

    10.17182/hepdata.78376.v3/t49

    Observed exclusion limit in the (BRe,BRtau) plane on the cross section for a 600 GeV stop. All limits are computed...

  • Cross Section Limit 2

    Data from Auxiliary Figure 3b

    10.17182/hepdata.78376.v3/t50

    Observed exclusion limit in the (BRe,BRtau) plane on the cross section for a 700 GeV stop. All limits are computed...

  • Cross Section Limit 3

    Data from Auxiliary Figure 4b

    10.17182/hepdata.78376.v3/t51

    Observed exclusion limit in the (BRe,BRtau) plane on the cross section for a 800 GeV stop. All limits are computed...

  • Cross Section Limit 4

    Data from Auxiliary Figure 5b

    10.17182/hepdata.78376.v3/t52

    Observed exclusion limit in the (BRe,BRtau) plane on the cross section for a 900 GeV stop. All limits are computed...

  • Cross Section Limit 5

    Data from Auxiliary Figure 6b

    10.17182/hepdata.78376.v3/t53

    Observed exclusion limit in the (BRe,BRtau) plane on the cross section for a 1000 GeV stop. All limits are computed...

  • Cross Section Limit 6

    Data from Auxiliary Figure 7b

    10.17182/hepdata.78376.v3/t54

    Observed exclusion limit in the (BRe,BRtau) plane on the cross section for a 1050 GeV stop. All limits are computed...

  • Cross Section Limit 7

    Data from Auxiliary Figure 8b

    10.17182/hepdata.78376.v3/t55

    Observed exclusion limit in the (BRe,BRtau) plane on the cross section for a 1100 GeV stop. All limits are computed...

  • Cross Section Limit 8

    Data from Auxiliary Figure 9b

    10.17182/hepdata.78376.v3/t56

    Observed exclusion limit in the (BRe,BRtau) plane on the cross section for a 1150 GeV stop. All limits are computed...

  • Cross Section Limit 9

    Data from Auxiliary Figure 10b

    10.17182/hepdata.78376.v3/t57

    Observed exclusion limit in the (BRe,BRtau) plane on the cross section for a 1200 GeV stop. All limits are computed...

  • Cross Section Limit 10

    Data from Auxiliary Figure 11b

    10.17182/hepdata.78376.v3/t58

    Observed exclusion limit in the (BRe,BRtau) plane on the cross section for a 1250 GeV stop. All limits are computed...

  • Cross Section Limit 11

    Data from Auxiliary Figure 12b

    10.17182/hepdata.78376.v3/t59

    Observed exclusion limit in the (BRe,BRtau) plane on the cross section for a 1300 GeV stop. All limits are computed...

  • Cross Section Limit 12

    Data from Auxiliary Figure 13b

    10.17182/hepdata.78376.v3/t60

    Observed exclusion limit in the (BRe,BRtau) plane on the cross section for a 1350 GeV stop. All limits are computed...

  • Cross Section Limit 13

    Data from Auxiliary Figure 14b

    10.17182/hepdata.78376.v3/t61

    Observed exclusion limit in the (BRe,BRtau) plane on the cross section for a 1400 GeV stop. All limits are computed...

  • Cross Section Limit 14

    Data from Auxiliary Figure 15b

    10.17182/hepdata.78376.v3/t62

    Observed exclusion limit in the (BRe,BRtau) plane on the cross section for a 1450 GeV stop. All limits are computed...

  • Cross Section Limit 15

    Data from Auxiliary Figure 16b

    10.17182/hepdata.78376.v3/t63

    Observed exclusion limit in the (BRe,BRtau) plane on the cross section for a 1500 GeV stop. All limits are computed...

  • Cross Section Limit 16

    Data from Auxiliary Figure 17b

    10.17182/hepdata.78376.v3/t64

    Observed exclusion limit in the (BRe,BRtau) plane on the cross section for a 1550 GeV stop. All limits are computed...

  • Cross Section Limit 17

    Data from Auxiliary Figure 18b

    10.17182/hepdata.78376.v3/t65

    Observed exclusion limit in the (BRe,BRtau) plane on the cross section for a 1600 GeV stop. All limits are computed...

  • Region Choice 1

    Data from Auxiliary Figure 2c

    10.17182/hepdata.78376.v3/t66

    The chosen signal region in the (BRe,BRtau) plane with the best expected exclusion on the cross section for a 600...

  • Region Choice 2

    Data from Auxiliary Figure 3c

    10.17182/hepdata.78376.v3/t67

    The chosen signal region in the (BRe,BRtau) plane with the best expected exclusion on the cross section for a 700...

  • Region Choice 3

    Data from Auxiliary Figure 4c

    10.17182/hepdata.78376.v3/t68

    The chosen signal region in the (BRe,BRtau) plane with the best expected exclusion on the cross section for a 800...

  • Region Choice 4

    Data from Auxiliary Figure 5c

    10.17182/hepdata.78376.v3/t69

    The chosen signal region in the (BRe,BRtau) plane with the best expected exclusion on the cross section for a 900...

  • Region Choice 5

    Data from Auxiliary Figure 6c

    10.17182/hepdata.78376.v3/t70

    The chosen signal region in the (BRe,BRtau) plane with the best expected exclusion on the cross section for a 1000...

  • Region Choice 6

    Data from Auxiliary Figure 7c

    10.17182/hepdata.78376.v3/t71

    The chosen signal region in the (BRe,BRtau) plane with the best expected exclusion on the cross section for a 1050...

  • Region Choice 7

    Data from Auxiliary Figure 8c

    10.17182/hepdata.78376.v3/t72

    The chosen signal region in the (BRe,BRtau) plane with the best expected exclusion on the cross section for a 1100...

  • Region Choice 8

    Data from Auxiliary Figure 9c

    10.17182/hepdata.78376.v3/t73

    The chosen signal region in the (BRe,BRtau) plane with the best expected exclusion on the cross section for a 1150...

  • Region Choice 9

    Data from Auxiliary Figure 10c

    10.17182/hepdata.78376.v3/t74

    The chosen signal region in the (BRe,BRtau) plane with the best expected exclusion on the cross section for a 1200...

  • Region Choice 10

    Data from Auxiliary Figure 11c

    10.17182/hepdata.78376.v3/t75

    The chosen signal region in the (BRe,BRtau) plane with the best expected exclusion on the cross section for a 1250...

  • Region Choice 11

    Data from Auxiliary Figure 12c

    10.17182/hepdata.78376.v3/t76

    The chosen signal region in the (BRe,BRtau) plane with the best expected exclusion on the cross section for a 1300...

  • Region Choice 12

    Data from Auxiliary Figure 13c

    10.17182/hepdata.78376.v3/t77

    The chosen signal region in the (BRe,BRtau) plane with the best expected exclusion on the cross section for a 1350...

  • Region Choice 13

    Data from Auxiliary Figure 14c

    10.17182/hepdata.78376.v3/t78

    The chosen signal region in the (BRe,BRtau) plane with the best expected exclusion on the cross section for a 1400...

  • Region Choice 14

    Data from Auxiliary Figure 15c

    10.17182/hepdata.78376.v3/t79

    The chosen signal region in the (BRe,BRtau) plane with the best expected exclusion on the cross section for a 1450...

  • Region Choice 15

    Data from Auxiliary Figure 16c

    10.17182/hepdata.78376.v3/t80

    The chosen signal region in the (BRe,BRtau) plane with the best expected exclusion on the cross section for a 1500...

  • Region Choice 16

    Data from Auxiliary Figure 17c

    10.17182/hepdata.78376.v3/t81

    The chosen signal region in the (BRe,BRtau) plane with the best expected exclusion on the cross section for a 1550...

  • Region Choice 17

    Data from Auxiliary Figure 18c

    10.17182/hepdata.78376.v3/t82

    The chosen signal region in the (BRe,BRtau) plane with the best expected exclusion on the cross section for a 1600...

Version 3 modifications: Fixed missing dat & cxx scripts, and swapped y & x axis data for efficiency and acceptance plots.

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