• Browse all
Search for direct top-squark pair production in final states with two leptons in pp collisions at $\sqrt{s} =$ 8TeV with the ATLAS detector

The ATLAS collaboration
JHEP 1406 (2014) 124, 2014

Abstract (data abstract)
CERN-LHC. A search is presented for direct top-squark pair production in final states with two leptons (electrons or muons) of opposite charge using 20.3 fb^-1 of pp collision data at sqrt(s) = 8 TeV, collected by the ATLAS experiment at the Large Hadron Collider in 2012. No excess over the Standard Model expectation is found. The results are interpreted under the separate assumptions (i) that the top squark decays to a b-quark in addition to an on-shell chargino whose decay occurs via a real or virtual W boson, or (ii) that the top squark decays to a t-quark and the lightest neutralino. A top squark with a mass between 150 GeV and 445 GeV decaying to a b-quark and an on-shell chargino is excluded at 95% confidence level for a top squark mass equal to the chargino mass plus 10 GeV, in the case of a 1 GeV lightest neutralino. Top squarks with masses between 215 (90) GeV and 530 (170) GeV decaying to an on-shell (off-shell) t-quark and a neutralino are excluded at 95% confidence level for a 1 GeV neutralino.

  • Table 1

    Data from Figure 8A

    10.17182/hepdata.63983.v1/t1

    Distribution of mT2 for events passing all the signal candidate selection requirements, except that on mT2 of the L90 and...

  • Table 2

    Data from Figure 8B

    10.17182/hepdata.63983.v1/t2

    Distribution of mT2 for events passing all the signal candidate selection requirements, except that on mT2 of the L90 and...

  • Table 3

    Data from Figure 9A

    10.17182/hepdata.63983.v1/t3

    Distribution of mT2 for events passing all the signal candidate selection requirements, except that on mT2 of the L100 selection,...

  • Table 4

    Data from Figure 9B

    10.17182/hepdata.63983.v1/t4

    Distribution of mT2 for events passing all the signal candidate selection requirements, except that on mT2 of the L100 selection,...

  • Table 5

    Data from Figure 10A

    10.17182/hepdata.63983.v1/t5

    Distribution of mT2 for events passing all the signal candidate selection requirements, except that on mT2 of the L110 selection,...

  • Table 6

    Data from Figure 10B

    10.17182/hepdata.63983.v1/t6

    Distribution of mT2 for events passing all the signal candidate selection requirements, except that on mT2 of the L110 selection,...

  • Table 7

    Data from Figure 14

    10.17182/hepdata.63983.v1/t7

    Observed 95% CL exclusion contour in the (STOP1, CHARGINO1) mass plane for a fixed value of m(NEUTRALINO1) = 1 GeV.

  • Table 8

    Data from Figure 14

    10.17182/hepdata.63983.v1/t8

    Expected 95% CL exclusion contour in the (STOP1, CHARGINO1) mass plane for a fixed value of m(NEUTRALINO1) = 1 GeV.

  • Table 9

    Data from Figure 14

    10.17182/hepdata.63983.v1/t9

    Observed 95% CL exclusion minus 1 sigma contour in the (STOP1, CHARGINO1) mass plane for a fixed value of m(NEUTRALINO1)...

  • Table 10

    Data from Figure 15

    10.17182/hepdata.63983.v1/t10

    Observed 95% CL exclusion contour in the (STOP1, NEUTRALINO1) mass plane for a fixed value of m(STOP1) - m(CHARGINO1) =...

  • Table 11

    Data from Figure 15

    10.17182/hepdata.63983.v1/t11

    Expected 95% CL exclusion contour in the (STOP1, NEUTRALINO1) mass plane for a fixed value of m(STOP1) - m(CHARGINO1) =...

  • Table 12

    Data from Figure 15

    10.17182/hepdata.63983.v1/t12

    Observed 95% CL exclusion minus 1 sigma contour in the (STOP1, NEUTRALINO1) mass plane for a fixed value of m(STOP1)...

  • Table 13

    Data from Figure 16

    10.17182/hepdata.63983.v1/t13

    Observed 95% CL exclusion contour in the (CHARGINO1, NEUTRALINO1) mass plane for a fixed value of m(STOP1) = 300 GeV.

  • Table 14

    Data from Figure 16

    10.17182/hepdata.63983.v1/t14

    Expected 95% CL exclusion contour in the (CHARGINO1, NEUTRALINO1) mass plane for a fixed value of m(STOP1) = 300 GeV.

  • Table 15

    Data from Figure 16

    10.17182/hepdata.63983.v1/t15

    Observed 95% CL exclusion minus one sigma contour in the (CHARGINO1, NEUTRALINO1) mass plane for a fixed value of m(STOP1)...

  • Table 16

    Data from Figure 17

    10.17182/hepdata.63983.v1/t16

    Observed 95% CL exclusion contour in the (STOP1, NEUTRALINO1) mass plane of m(CHARGINO1) = 2 m(NEUTRALINO1).

  • Table 17

    Data from Figure 17

    10.17182/hepdata.63983.v1/t17

    Expected 95% CL exclusion contour in the (STOP1, NEUTRALINO1) mass plane for m(CHARGINO1) = 2 m(NEUTRALINO1).

  • Table 18

    Data from Figure 17

    10.17182/hepdata.63983.v1/t18

    Observed 95% CL exclusion minus one sigma contour in the (STOP1, NEUTRALINO1) mass plane for m(CHARGINO1) = 2 m(NEUTRALINO1).

  • Table 19

    Data from Figure 18

    10.17182/hepdata.63983.v1/t19

    Observed 95% CL exclusion contour in the (STOP1, NEUTRALINO1) mass plane.

  • Table 20

    Data from Figure 18

    10.17182/hepdata.63983.v1/t20

    Expected 95% CL exclusion contour in the (STOP1, NEUTRALINO1) mass plane.

  • Table 21

    Data from Figure 18

    10.17182/hepdata.63983.v1/t21

    Observed 95% CL exclusion minus one sigma contour in the (STOP1, NEUTRALINO1) mass plane.

  • Table 22

    Data from Figure 19

    10.17182/hepdata.63983.v1/t22

    Observed 95% CL exclusion contour in the (STOP1, NEUTRALINO1) mass plane.

  • Table 23

    Data from Figure 19

    10.17182/hepdata.63983.v1/t23

    Expected 95% CL exclusion contour in the (STOP1, NEUTRALINO1) mass plane.

  • Table 24

    Data from Figure 19

    10.17182/hepdata.63983.v1/t24

    Observed 95% CL exclusion minus one sigma contour in the (STOP1, NEUTRALINO1) mass plane.

  • Table 25

    Data from Figure 20

    10.17182/hepdata.63983.v1/t25

    Observed 95% CL exclusion contour in the (STOP1, NEUTRALINO1) mass plane for a fixed value of m(CHARGINO1) = 106 GeV.

  • Table 26

    Data from Figure 20

    10.17182/hepdata.63983.v1/t26

    Expected 95% CL exclusion contour in the (STOP1, NEUTRALINO1) mass plane for a fixed value of m(CHARGINO1) = 106 GeV.

  • Table 27

    Data from Figure 20

    10.17182/hepdata.63983.v1/t27

    Observed 95% CL exclusion minus one sigma contour in the (STOP1, NEUTRALINO1) mass plane for a fixed value of m(CHARGINO1)...

  • Table 28

    Data from Auxiliary Figure 2A

    10.17182/hepdata.63983.v1/t28

    Expected CLs values for Fig. 14.

  • Table 29

    Data from Auxiliary Figure 1A

    10.17182/hepdata.63983.v1/t29

    Observed CLs values for Fig. 14.

  • Table 30

    Data from Auxiliary Figure 3A

    10.17182/hepdata.63983.v1/t30

    Observed cross-section limits for Fig. 14.

  • Table 31

    Data from Auxiliary Figure 2B

    10.17182/hepdata.63983.v1/t31

    Expected CLs values for Fig. 15.

  • Table 32

    Data from Auxiliary Figure 1B

    10.17182/hepdata.63983.v1/t32

    Observed CLs values for Fig. 15.

  • Table 33

    Data from Auxiliary Figure 3B

    10.17182/hepdata.63983.v1/t33

    Observed cross-section limits for Fig. 15.

  • Table 34

    Data from Auxiliary Figure 2C

    10.17182/hepdata.63983.v1/t34

    Expected CLs values for Fig. 16.

  • Table 35

    Data from Auxiliary Figure 1C

    10.17182/hepdata.63983.v1/t35

    Observed CLs values for Fig. 16.

  • Table 36

    Data from Auxiliary Figure 3C

    10.17182/hepdata.63983.v1/t36

    Observed cross-section limits for Fig. 14.

  • Table 37

    Data from Auxiliary Figure 2D

    10.17182/hepdata.63983.v1/t37

    Expected CLs values for Fig. 17.

  • Table 38

    Data from Auxiliary Figure 1D

    10.17182/hepdata.63983.v1/t38

    Observed CLs values for Fig. 17.

  • Table 39

    Data from Auxiliary Figure 3D

    10.17182/hepdata.63983.v1/t39

    Observed cross-section limits for Fig. 17.

  • Table 40

    Data from Auxiliary Figure 2E

    10.17182/hepdata.63983.v1/t40

    Expected CLs values for Fig. 19.

  • Table 41

    Data from Auxiliary Figure 1E

    10.17182/hepdata.63983.v1/t41

    Observed CLs values for Fig. 19.

  • Table 42

    Data from Auxiliary Figure 3E

    10.17182/hepdata.63983.v1/t42

    Observed cross-section limits for Fig. 19.

  • Table 43

    Data from Auxiliary Figure 4

    10.17182/hepdata.63983.v1/t43

    Number of generated events for Fig. 16.

  • Table 44

    Data from Auxiliary Figure 6A

    10.17182/hepdata.63983.v1/t44

    Acceptance of S1 for Fig. 16.

  • Table 45

    Data from Auxiliary Figure 7A

    10.17182/hepdata.63983.v1/t45

    Efficiency of S1 for Fig. 16.

  • Table 46

    Data from Auxiliary Figure 5A

    10.17182/hepdata.63983.v1/t46

    Total systematic uncertainty IN PCT on signal yields in S1 for Fig. 16.

  • Table 47

    Data from Auxiliary Figure 6B

    10.17182/hepdata.63983.v1/t47

    Acceptance of S2 for Fig. 16.

  • Table 48

    Data from Auxiliary Figure 7B

    10.17182/hepdata.63983.v1/t48

    Efficiency of S2 for Fig. 16.

  • Table 49

    Data from Auxiliary Figure 5B

    10.17182/hepdata.63983.v1/t49

    Total systematic uncertainty IN PCT on signal yields in S2 for Fig. 16.

  • Table 50

    Data from Auxiliary Figure 6C

    10.17182/hepdata.63983.v1/t50

    Acceptance of S3 for Fig. 16.

  • Table 51

    Data from Auxiliary Figure 7C

    10.17182/hepdata.63983.v1/t51

    Efficiency of S3 for Fig. 16.

  • Table 52

    Data from Auxiliary Figure 5C

    10.17182/hepdata.63983.v1/t52

    Total systematic uncertainty IN PCT on signal yields in S3 for Fig. 16.

  • Table 53

    Data from Auxiliary Figure 6D

    10.17182/hepdata.63983.v1/t53

    Acceptance of S4 for Fig. 16.

  • Table 54

    Data from Auxiliary Figure 7D

    10.17182/hepdata.63983.v1/t54

    Efficiency of S4 for Fig. 16.

  • Table 55

    Data from Auxiliary Figure 5D

    10.17182/hepdata.63983.v1/t55

    Total systematic uncertainty IN PCT on signal yields in S4 for Fig. 16.

  • Table 56

    Data from Auxiliary Figure 6E

    10.17182/hepdata.63983.v1/t56

    Acceptance of S5 for Fig. 16.

  • Table 57

    Data from Auxiliary Figure 7E

    10.17182/hepdata.63983.v1/t57

    Efficiency of S5 for Fig. 16.

  • Table 58

    Data from Auxiliary Figure 5E

    10.17182/hepdata.63983.v1/t58

    Total systematic uncertainty IN PCT on signal yields in S5 for Fig. 16.

  • Table 59

    Data from Auxiliary Figure 6F

    10.17182/hepdata.63983.v1/t59

    Acceptance of S6 for Fig. 16.

  • Table 60

    Data from Auxiliary Figure 7F

    10.17182/hepdata.63983.v1/t60

    Efficiency of S6 for Fig. 16.

  • Table 61

    Data from Auxiliary Figure 5F

    10.17182/hepdata.63983.v1/t61

    Total systematic uncertainty IN PCT on signal yields in S6 for Fig. 16.

  • Table 62

    Data from Auxiliary Figure 6G

    10.17182/hepdata.63983.v1/t62

    Acceptance of S7 for Fig. 16.

  • Table 63

    Data from Auxiliary Figure 7G

    10.17182/hepdata.63983.v1/t63

    Efficiency of S7 for Fig. 16.

  • Table 64

    Data from Auxiliary Figure 5G

    10.17182/hepdata.63983.v1/t64

    Total systematic uncertainty IN PCT on signal yields in S7 for Fig. 16.

  • Table 65

    Data from Auxiliary Figure 6H

    10.17182/hepdata.63983.v1/t65

    Acceptance of H160 for Fig. 16.

  • Table 66

    Data from Auxiliary Figure 7H

    10.17182/hepdata.63983.v1/t66

    Efficiency of H160 for Fig. 16.

  • Table 67

    Data from Auxiliary Figure 5H

    10.17182/hepdata.63983.v1/t67

    Total systematic uncertainty IN PCT on signal yields in H160 for Fig. 16.

  • Table 68

    Data from Auxiliary Figure 3F

    10.17182/hepdata.63983.v1/t68

    Observed cross-section limits for Fig. 20.

  • Table 69

    Data from Auxiliary Figure 1F

    10.17182/hepdata.63983.v1/t69

    Observed cross-section limits for Fig. 20.

  • Table 70

    Data from Auxiliary Figure 2F

    10.17182/hepdata.63983.v1/t70

    Expected cross-section limits for Fig. 20.

  • Table 71

    Data from Auxiliary Figure 13

    10.17182/hepdata.63983.v1/t71

    Total number of generated MC events for each point of the grid.

  • Table 72

    Data from Auxiliary Figure 10A

    10.17182/hepdata.63983.v1/t72

    Observed upper limit on the signal cross-section, in pb, for each point of the grid in the different flavour channel.

  • Table 73

    Data from Auxiliary Figure 10B

    10.17182/hepdata.63983.v1/t73

    Observed upper limit on the signal cross-section, in pb, for each point of the grid in the same flavour channel.

  • Table 74

    Data from Auxiliary Figure 11A

    10.17182/hepdata.63983.v1/t74

    The best expected signal region chosen for each point of the grid in the different flavour channel.

  • Table 75

    Data from Auxiliary Figure 11B

    10.17182/hepdata.63983.v1/t75

    The best expected signal region chosen for each point of the grid in the same flavour channel.

  • Table 76

    Data from Auxiliary Figure 8A

    10.17182/hepdata.63983.v1/t76

    Observed CLs for each point of the grid in the different flavour channel.

  • Table 77

    Data from Auxiliary Figure 8B

    10.17182/hepdata.63983.v1/t77

    Observed CLs for each point of the grid in the same flavour channel.

  • Table 78

    Data from Auxiliary Figure 9A

    10.17182/hepdata.63983.v1/t78

    Expected CLs for each point of the grid in the different flavour channel.

  • Table 79

    Data from Auxiliary Figure 9B

    10.17182/hepdata.63983.v1/t79

    Expected CLs for each point of the grid in the same flavour channel.

  • Table 80

    Data from Auxiliary Figure 14A

    10.17182/hepdata.63983.v1/t80

    Signal acceptance for all the analysis cuts, except the BDTG cut, for each point of the grid in the different...

  • Table 81

    Data from Auxiliary Figure 14B

    10.17182/hepdata.63983.v1/t81

    Signal acceptance for all the analysis cuts, except the BDTG cut, for each point of the grid in the same...

  • Table 82

    Data from Auxiliary Figure 15A

    10.17182/hepdata.63983.v1/t82

    Signal efficiency, including the acceptance of the BDTG cut, for each point of the grid in the different flavour channel.

  • Table 83

    Data from Auxiliary Figure 15B

    10.17182/hepdata.63983.v1/t83

    Signal efficiency, including the acceptance of the BDTG cut, for each point of the grid in the same flavour channel.

  • Table 84

    Data from Auxiliary Figure 12A

    10.17182/hepdata.63983.v1/t84

    Total signal experimental systematic uncertainty for each point of the grid in the different flavour channel.

  • Table 85

    Data from Auxiliary Figure 12B

    10.17182/hepdata.63983.v1/t85

    Signal efficiency, including the acceptance of the BDTG cut, for each point of the grid in the same flavour channel.

  • Table 86

    Data from Auxiliary Figure 22

    10.17182/hepdata.63983.v1/t86

    Number of simulated events passing various stages of the selection in the hadronic mT2 analysis for a signal sample with...

  • Table 87

    Data from Auxiliary Figure 23

    10.17182/hepdata.63983.v1/t87

    Number of simulated events passing various stages of the selection in the hadronic mT2 analysis for a signal sample with...

  • Table 88

    Data from Auxiliary Figure 24

    10.17182/hepdata.63983.v1/t88

    Number of simulated events passing various stages of the selection in the leptonic mT2 analysis for two signal samples with...

  • Table 89

    Data from Auxiliary Figure 25

    10.17182/hepdata.63983.v1/t89

    Number of simulated events passing various stages of the selection in the leptonic mT2 analysis for a signal sample with...

  • Table 90

    Data from Auxiliary Figure 26

    10.17182/hepdata.63983.v1/t90

    Number of simulated events passing various stages of the selection in the in the MVA analysis for all signal samples...

Loading Data...