Abstract (data abstract)

CERN-LHC. A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the Z boson mass, jets tagged as originating from b-quarks and missing transverse momentum. The analysis is performed with proton-proton collision data at sqrt(s) = 8 TeV collected with the ATLAS detector at the LHC in 2012 corresponding to an integrated luminosity of 20.3 fb^-1. No excess beyond the Standard Model expectation is observed. Interpretations of the results are provided in models based on the direct pair production of the heavier top squark state (t2) followed by the decay to the lighter top squark state (t1) via t2 --> Z t1, and for t1 pair production in natural gauge-mediated supersymmetry breaking scenarios where the neutralino (chi1^0) is the next-to-lightest supersymmetric particle and decays producing a Z boson and a gravitino (G) via the chi1^0 --> Z G process.

Table 1

Data from Figure 1A

10.17182/hepdata.63210.v1/t1

PT(ll) distribution in SR2A for stop GMSB model (data+/-stat, bkg+/-(stat+syst), signal+/-stat), m(stop1)=500 GeV, m(neutralino1)=400 GeV.
Table 2

Data from Figure 1B

10.17182/hepdata.63210.v1/t2

njet_3l (data+/-stat, bkg+/-(stat+syst), signal+/-stat).
Table 3

Data from Figure 2A

10.17182/hepdata.63210.v1/t3

Missing ET distribution in SR2A for stop GMSB model (data+/-stat, bkg+/-(stat+syst), signal+/-stat), m(stop1)=500 GeV, m(neutralino1)=400 GeV.
Table 4

Data from Figure 2B

10.17182/hepdata.63210.v1/t4

Missing ET distribution in SR2B for stop GMSB model (data+/-stat, bkg+/-(stat+syst), signal+/-stat), m(stop1)=500 GeV, m(neutralino1)=400 GeV.
Table 5

Data from Figure 2C

10.17182/hepdata.63210.v1/t5

Missing ET distribution in SR2C for stop GMSB model (data+/-stat, bkg+/-(stat+syst), signal+/-stat), m(stop1)=500 GeV, m(neutralino1)=400 GeV.
Table 6

Data from Figure 3A

10.17182/hepdata.63210.v1/t6

met_sr3a (data+/-stat, bkg+/-(stat+syst), signal+/-stat).
Table 7

Data from Figure 3B

10.17182/hepdata.63210.v1/t7

met_sr3b (data+/-stat, bkg+/-(stat+syst), signal+/-stat).
Table 8

Data from Figure 4

10.17182/hepdata.63210.v1/t8

Expected exclusion limits at 95% CL for stop2 grid.
Table 9

Data from Figure 4

10.17182/hepdata.63210.v1/t9

Expected exclusion limits +1sigma at 95% CL for stop2 grid.
Table 10

Data from Figure 4

10.17182/hepdata.63210.v1/t10

Expected exclusion limits -1sigma at 95% CL for stop2 grid.
Table 11

Data from Figure 4

10.17182/hepdata.63210.v1/t11

Observed exclusion limits at 95% CL for stop2 grid.
Table 12

Data from Figure 4

10.17182/hepdata.63210.v1/t12

Observed exclusion limits +1sigma SUSY cross section uncertainty at 95% CL for stop2 grid.
Table 13

Data from Figure 4

10.17182/hepdata.63210.v1/t13

Observed exclusion limits -1sigma SUSY cross section uncertainty at 95% CL for stop2 grid.
Table 14

Data from Figure 5

10.17182/hepdata.63210.v1/t14

t2_350_n1_20_Observed.
Table 15

Data from Figure 5

10.17182/hepdata.63210.v1/t15

t2_350_n1_20_Expected.
Table 16

Data from Figure 5

10.17182/hepdata.63210.v1/t16

t2_500_n1_20_Observed.
Table 17

Data from Figure 5

10.17182/hepdata.63210.v1/t17

t2_500_n1_20_Expected.
Table 18

Data from Figure 5

10.17182/hepdata.63210.v1/t18

t2_500_n1_120_Observed.
Table 19

Data from Figure 5

10.17182/hepdata.63210.v1/t19

t2_500_n1_120_Expected.
Table 20

Data from Figure 6

10.17182/hepdata.63210.v1/t20

Expected exclusion limits at 95% CL for stop GMSB model.
Table 21

Data from Figure 6

10.17182/hepdata.63210.v1/t21

Expected exclusion limits +1sigma at 95% CL for stop GMSB model.
Table 22

Data from Figure 6

10.17182/hepdata.63210.v1/t22

Expected exclusion limits -1sigma at 95% CL for stop GMSB model.
Table 23

Data from Figure 6

10.17182/hepdata.63210.v1/t23

Observed exclusion limits at 95% CL for stop GMSB model.
Table 24

Data from Figure 6

10.17182/hepdata.63210.v1/t24

Observed exclusion limits +1sigma SUSY cross section uncertainty at 95% CL for stop GMSB model.
Table 25

Data from Figure 6

10.17182/hepdata.63210.v1/t25

Observed exclusion limits -1sigma SUSY cross section uncertainty at 95% CL for stop GMSB model.
Table 26

Data from Auxiliary Figure 1A

10.17182/hepdata.63210.v1/t26

met_3l2j (data+/-stat, bkg+/-(stat+syst), signal+/-stat).
Table 27

Data from Auxiliary Figure 1B

10.17182/hepdata.63210.v1/t27

met_3l3j (data+/-stat, bkg+/-(stat+syst), signal+/-stat).
Table 28

Data from Auxiliary Figure 3

10.17182/hepdata.63210.v1/t28

The best expected signal region for stop2 model, where 1 and 2 mean SR3A and SR3B.
Table 29

Data from Auxiliary Figure 4

10.17182/hepdata.63210.v1/t29

The best expected signal region for stop GMSB model, where 1 and 2 mean SR2A and SR2B.
Table 30

Data from Auxiliary Figure 5A

10.17182/hepdata.63210.v1/t30

The best expected signal region for stop2 mass 350 GeV and neutralino1 mass 20 GeV, where 1 and 2 mean...
Table 31

Data from Auxiliary Figure 5B

10.17182/hepdata.63210.v1/t31

The best expected signal region for stop2 mass 500 GeV and neutralino1 mass 20 GeV, where 1 and 2 mean...
Table 32

Data from Auxiliary Figure 5C

10.17182/hepdata.63210.v1/t32

The best expected signal region for stop2 mass 500 GeV and neutralino1 mass 120 GeV, where 1 and 2 mean...
Table 33

Data from Auxiliary Figure 6

10.17182/hepdata.63210.v1/t33

Observed upper limit on the signal cross section for stop2 grid.
Table 34

Data from Auxiliary Figure 9B

10.17182/hepdata.63210.v1/t34

Number of generated MC events for stop Natural GMSB model.
Table 35

Data from Auxiliary Figure 9A

10.17182/hepdata.63210.v1/t35

Cross section for stop Natural GMSB model.
Table 36

Data from Auxiliary Figure 10A

10.17182/hepdata.63210.v1/t36

xsec_stop2.
Table 37

Data from Auxiliary Figure 10B

10.17182/hepdata.63210.v1/t37

Ntot_stop2.
Table 38

Data from Auxiliary Figure 11C

10.17182/hepdata.63210.v1/t38

Acceptance of stop GMSB model for SR2A.
Table 39

Data from Auxiliary Figure 11D

10.17182/hepdata.63210.v1/t39

Efficiency of stop GMSB model for SR2A.
Table 40

Data from Auxiliary Figure 11A

10.17182/hepdata.63210.v1/t40

Number of expected signal events of stop GMSB model for SR2A.
Table 41

Data from Auxiliary Figure 11B

10.17182/hepdata.63210.v1/t41

Total systematic uncertainty of stop GMSB model for SR2A.
Table 42

Data from Auxiliary Figure 11E

10.17182/hepdata.63210.v1/t42

Observed CL_s of stop GMSB model for SR2A.
Table 43

Data from Auxiliary Figure 11F

10.17182/hepdata.63210.v1/t43

Expected CL_s of stop GMSB model for SR2A.
Table 44

Data from Auxiliary Figure 12C

10.17182/hepdata.63210.v1/t44

Acceptance of stop GMSB model for SR2B.
Table 45

Data from Auxiliary Figure 12D

10.17182/hepdata.63210.v1/t45

Efficiency of stop GMSB model for SR2B.
Table 46

Data from Auxiliary Figure 12A

10.17182/hepdata.63210.v1/t46

Number of expected signal events of stop GMSB model for SR2B.
Table 47

Data from Auxiliary Figure 12B

10.17182/hepdata.63210.v1/t47

Total systematic uncertainty of stop GMSB model for SR2B.
Table 48

Data from Auxiliary Figure 12E

10.17182/hepdata.63210.v1/t48

Observed CL_s of stop GMSB model for SR2B.
Table 49

Data from Auxiliary Figure 12F

10.17182/hepdata.63210.v1/t49

Expected CL_s of stop GMSB model for SR2B.
Table 50

Data from Auxiliary Figure 13C

10.17182/hepdata.63210.v1/t50

Acceptance of stop GMSB model for SR2C.
Table 51

Data from Auxiliary Figure 13D

10.17182/hepdata.63210.v1/t51

Efficiency of stop GMSB model for SR2C.
Table 52

Data from Auxiliary Figure 13A

10.17182/hepdata.63210.v1/t52

Number of expected signal events of stop GMSB model for SR2C.
Table 53

Data from Auxiliary Figure 13B

10.17182/hepdata.63210.v1/t53

Total systematic uncertainty of stop GMSB model for SR2C.
Table 54

Data from Auxiliary Figure 13E

10.17182/hepdata.63210.v1/t54

Observed CL_s of stop GMSB model for SR2C.
Table 55

Data from Auxiliary Figure 13F

10.17182/hepdata.63210.v1/t55

Expected CL_s of stop GMSB model for SR2C.
Table 56

Data from Auxiliary Figure 14A

10.17182/hepdata.63210.v1/t56

Nexp_SR3A.
Table 57

Data from Auxiliary Figure 14B

10.17182/hepdata.63210.v1/t57

RelUnc_SR3A.
Table 58

Data from Auxiliary Figure 14C

10.17182/hepdata.63210.v1/t58

Acc_SR3A.
Table 59

Data from Auxiliary Figure 14D

10.17182/hepdata.63210.v1/t59

Eff_SR3A.
Table 60

Data from Auxiliary Figure 14F

10.17182/hepdata.63210.v1/t60

CLsExp_SR3A.
Table 61

Data from Auxiliary Figure 14E

10.17182/hepdata.63210.v1/t61

CLs_SR3A.
Table 62

Data from Auxiliary Figure 15A

10.17182/hepdata.63210.v1/t62

Nexp_SR3B.
Table 63

Data from Auxiliary Figure 15B

10.17182/hepdata.63210.v1/t63

RelUnc_SR3B.
Table 64

Data from Auxiliary Figure 15C

10.17182/hepdata.63210.v1/t64

Acc_SR3B.
Table 65

Data from Auxiliary Figure 15D

10.17182/hepdata.63210.v1/t65

Eff_SR3B.
Table 66

Data from Auxiliary Figure 15F

10.17182/hepdata.63210.v1/t66

CLsExp_SR3B.
Table 67

Data from Auxiliary Figure 15E

10.17182/hepdata.63210.v1/t67

CLs_SR3B.

Table 1

Table 2

Table 3

Table 4

Table 5

Table 6

Table 7

Table 8

Table 9

Table 10

Table 11

Table 12

Table 13

Table 14

Table 15

Table 16

Table 17

Table 18

Table 19

Table 20

Table 21

Table 22

Table 23

Table 24

Table 25

Table 26

Table 27

Table 28

Table 29

Table 30

Table 31

Table 32

Table 33

Table 34

Table 35

Table 36

Table 37

Table 38

Table 39

Table 40

Table 41

Table 42

Table 43

Table 44

Table 45

Table 46

Table 47

Table 48

Table 49

Table 50

Table 51

Table 52

Table 53

Table 54

Table 55

Table 56

Table 57

Table 58

Table 59

Table 60

Table 61

Table 62

Table 63

Table 64

Table 65

Table 66

Table 67

JSON YAML YODA YODA1 ROOT CSV

This table is related to:

This table is referred to by:

Visualize

Ask a Question

JSON

YAML

YODA

YODA1

ROOT

CSV