• Browse all
Search for supersymmetry in final states with charm jets and missing transverse momentum in 13 TeV $pp$ collisions with the ATLAS detector

The collaboration
JHEP 09 (2018) 050, 2018.

Abstract (data abstract)
A search for supersymmetric partners of top quarks decaying as $\tilde{t}_1\rightarrow c\tilde{\chi}_1^0$ and supersymmetric partners of charm quarks decaying as $\tilde{c}_1\rightarrow c\tilde{\chi}_1^0$, where $\tilde{\chi}_1^0$ is the lightest neutralino, is presented. The search uses 36.1 fb$^{-1}$ $pp$ collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS experiment at the Large Hadron Collider and is performed in final states with jets identified as containing charm hadrons. Assuming a 100% branching ratio to $c\tilde{\chi}_1^0$, top and charm squarks with masses up to 850 GeV are excluded at 95% confidence level for a massless lightest neutralino. For $m_{\tilde{t}_1,\tilde{c}_1}-m_{\tilde{\chi}_1^0} < 100$ GeV, top and charm squark masses 1 up to 500 GeV are excluded.

• #### Table 1

Data from Auxiliary Figure 1a.

10.17182/hepdata.83011.v3/t1

Acceptance for SR1 in the $\tilde{t}_1/\tilde{c}_1-\tilde{\chi}_1^0$ mass plane.

• #### Table 2

Data from Auxiliary Figure 1b.

10.17182/hepdata.83011.v3/t2

Acceptance for SR2 in the $\tilde{t}_1/\tilde{c}_1-\tilde{\chi}_1^0$ mass plane.

• #### Table 3

Data from Auxiliary Figure 1c.

10.17182/hepdata.83011.v3/t3

Acceptance for SR3 in the $\tilde{t}_1/\tilde{c}_1-\tilde{\chi}_1^0$ mass plane.

• #### Table 4

Data from Auxiliary Figure 1d.

10.17182/hepdata.83011.v3/t4

Acceptance for SR4 in the $\tilde{t}_1/\tilde{c}_1-\tilde{\chi}_1^0$ mass plane.

• #### Table 5

Data from Auxiliary Figure 1e.

10.17182/hepdata.83011.v3/t5

Acceptance for SR5 in the $\tilde{t}_1/\tilde{c}_1-\tilde{\chi}_1^0$ mass plane.

• #### Table 6

Data from Auxiliary Figure 1f.

10.17182/hepdata.83011.v3/t6

Acceptance for best expected CLS SR in the $\tilde{t}_1/\tilde{c}_1-\tilde{\chi}_1^0$ mass plane.

• #### Table 7

Data from Auxiliary Figure 2a.

10.17182/hepdata.83011.v3/t7

Detector efficiency for SR1 in the $\tilde{t}_1/\tilde{c}_1-\tilde{\chi}_1^0$ mass plane.

• #### Table 8

Data from Auxiliary Figure 2b.

10.17182/hepdata.83011.v3/t8

Detector efficiency for SR2 in the $\tilde{t}_1/\tilde{c}_1-\tilde{\chi}_1^0$ mass plane.

• #### Table 9

Data from Auxiliary Figure 2c.

10.17182/hepdata.83011.v3/t9

Detector efficiency for SR3 in the $\tilde{t}_1/\tilde{c}_1-\tilde{\chi}_1^0$ mass plane.

• #### Table 10

Data from Auxiliary Figure 2d.

10.17182/hepdata.83011.v3/t10

Detector efficiency for SR4 in the $\tilde{t}_1/\tilde{c}_1-\tilde{\chi}_1^0$ mass plane.

• #### Table 11

Data from Auxiliary Figure 2e.

10.17182/hepdata.83011.v3/t11

Detector efficiency for SR5 in the $\tilde{t}_1/\tilde{c}_1-\tilde{\chi}_1^0$ mass plane.

• #### Table 12

Data from Auxiliary Figure 2f.

10.17182/hepdata.83011.v3/t12

Detector efficiency for best expected CLS SR in the $\tilde{t}_1/\tilde{c}_1-\tilde{\chi}_1^0$ mass plane.

• #### Table 13

Data from Figure 6.

10.17182/hepdata.83011.v3/t13

Expected exclusion limit at 95% CL in the $m(\tilde t_1/\tilde c_1)$-$m(\tilde\chi^0_1)$ plane for the stop/scharm pair production scenario.

• #### Table 14

Data from figure 6

10.17182/hepdata.83011.v3/t14

Observed exclusion limit at 95% CL in the $m(\tilde t_1/\tilde c_1)$-$m(\tilde\chi^0_1)$ plane for the stop/scharm pair production scenario.

• #### Table 15

Data from Auxiliary Figure 3a.

10.17182/hepdata.83011.v3/t15

SR1 expected exclusion limit at 95% CL in the $m(\tilde t_1/\tilde c_1)$-$m(\tilde\chi^0_1)$ plane for the stop/scharm pair production scenario.

• #### Table 16

Data from Auxiliary Figure 3a.

10.17182/hepdata.83011.v3/t16

SR1 observed exclusion limit at 95% CL in the $m(\tilde t_1/\tilde c_1)$-$m(\tilde\chi^0_1)$ plane for the stop/scharm pair production scenario.

• #### Table 17

Data from Auxiliary Figure 3b.

10.17182/hepdata.83011.v3/t17

SR2 expected exclusion limit at 95% CL in the $m(\tilde t_1/\tilde c_1)$-$m(\tilde\chi^0_1)$ plane for the stop/scharm pair production scenario.

• #### Table 18

Data from Auxiliary Figure 3b.

10.17182/hepdata.83011.v3/t18

SR2 observed exclusion limit at 95% CL in the $m(\tilde t_1/\tilde c_1)$-$m(\tilde\chi^0_1)$ plane for the stop/scharm pair production scenario.

• #### Table 19

Data from Auxiliary Figure 3c.

10.17182/hepdata.83011.v3/t19

SR3 expected exclusion limit at 95% CL in the $m(\tilde t_1/\tilde c_1)$-$m(\tilde\chi^0_1)$ plane for the stop/scharm pair production scenario.

• #### Table 20

Data from Auxiliary Figure 3c.

10.17182/hepdata.83011.v3/t20

SR3 observed exclusion limit at 95% CL in the $m(\tilde t_1/\tilde c_1)$-$m(\tilde\chi^0_1)$ plane for the stop/scharm pair production scenario.

• #### Table 21

Data from Auxiliary Figure 3d.

10.17182/hepdata.83011.v3/t21

SR4 expected exclusion limit at 95% CL in the $m(\tilde t_1/\tilde c_1)$-$m(\tilde\chi^0_1)$ plane for the stop/scharm pair production scenario.

• #### Table 22

Data from Auxiliary Figure 3d.

10.17182/hepdata.83011.v3/t22

SR4 observed exclusion limit at 95% CL in the $m(\tilde t_1/\tilde c_1)$-$m(\tilde\chi^0_1)$ plane for the stop/scharm pair production scenario.

• #### Table 23

Data from Auxiliary Figure 3e.

10.17182/hepdata.83011.v3/t23

SR5 expected exclusion limit at 95% CL in the $m(\tilde t_1/\tilde c_1)$-$m(\tilde\chi^0_1)$ plane for the stop/scharm pair production scenario.

• #### Table 24

Data from Auxiliary Figure 3e.

10.17182/hepdata.83011.v3/t24

SR5 observed exclusion limit at 95% CL in the $m(\tilde t_1/\tilde c_1)$-$m(\tilde\chi^0_1)$ plane for the stop/scharm pair production scenario.

• #### Table 25

Data from Auxiliary Figure 4a.

10.17182/hepdata.83011.v3/t25

Upper limits on signal cross sections and exclusion limits at 95% CL for SR1 in the $m(\tilde t_1/\tilde c_1)$-$m(\tilde\chi^0_1)$ plane...

• #### Table 26

Data from Auxiliary Figure 4b.

10.17182/hepdata.83011.v3/t26

Upper limits on signal cross sections and exclusion limits at 95% CL for SR2 in the $m(\tilde t_1/\tilde c_1)$-$m(\tilde\chi^0_1)$ plane...

• #### Table 27

Data from Auxiliary Figure 4c.

10.17182/hepdata.83011.v3/t27

Upper limits on signal cross sections and exclusion limits at 95% CL for SR3 in the $m(\tilde t_1/\tilde c_1)$-$m(\tilde\chi^0_1)$ plane...

• #### Table 28

Data from Auxiliary Figure 4d.

10.17182/hepdata.83011.v3/t28

Upper limits on signal cross sections and exclusion limits at 95% CL for SR4 in the $m(\tilde t_1/\tilde c_1)$-$m(\tilde\chi^0_1)$ plane...

• #### Table 29

Data from Auxiliary Figure 4e.

10.17182/hepdata.83011.v3/t29

Upper limits on signal cross sections and exclusion limits at 95% CL for SR5 in the $m(\tilde t_1/\tilde c_1)$-$m(\tilde\chi^0_1)$ plane...

• #### Table 30

Data from Auxiliary Figure 4f.

10.17182/hepdata.83011.v3/t30

Upper limits on signal cross sections and exclusion limits at 95% CL for the best expected SR in the $m(\tilde... • #### Table 31 Data from Auxiliary Figure 5. 10.17182/hepdata.83011.v3/t31 Minimum branching ratio excluded at 95% CL, assuming no sensitivity for other decay possibilities, in the$m(\tilde t_1/\tilde c_1)$-$m(\tilde\chi^0_1)$plane... • #### Table 32 Data from Auxiliary Figure 6. 10.17182/hepdata.83011.v3/t32 The signal region with the best expected CLS value for each signal in the$\tilde{t}_1/\tilde{c}_1-\tilde{\chi}_1^0$mass plane. • #### Table 33 Data from Auxiliary 18. 10.17182/hepdata.83011.v3/t33 Expected exclusion limit at 95% CL in the$m(\tilde t_1/\tilde c_1)$-$\Delta m$plane for the stop/scharm pair production scenario. • #### Table 34 Data from Auxiliary 18. 10.17182/hepdata.83011.v3/t34 Observed exclusion limit at 95% CL in the$m(\tilde t_1/\tilde c_1)$-$\Delta m$plane for the stop/scharm pair production scenario. • #### Table 35 Data from Figure 5a. 10.17182/hepdata.83011.v3/t35 Comparison between data and expectation after the background-only fit for the$E_{T}^{miss}$distribution in SR1. The shaded band indicates detector-related... • #### Table 36 Data from Figure 5b. 10.17182/hepdata.83011.v3/t36 Comparison between data and expectation after the background-only fit for the$E_{T}^{miss}$distribution in SR2. The shaded band indicates detector-related... • #### Table 37 Data from Figure 5c. 10.17182/hepdata.83011.v3/t37 Comparison between data and expectation after the background-only fit for the$E_{T}^{miss}$distribution in SR3. The shaded band indicates detector-related... • #### Table 38 Data from Figure 5d. 10.17182/hepdata.83011.v3/t38 Comparison between data and expectation after the background-only fit for the$E_{T}^{miss}$distribution in SR4. The shaded band indicates detector-related... • #### Table 39 Data from Figure 5e. 10.17182/hepdata.83011.v3/t39 Comparison between data and expectation after the background-only fit for the$E_{T}^{miss}$distribution in SR5. The shaded band indicates detector-related... • #### Table 40 Data from Auxiliary Table 1. 10.17182/hepdata.83011.v3/t40 Cutflow for the$(m_{\tilde{t}}, m_{\tilde{\chi}}) = (450,425)$GeV signal point for signal region SR1. • #### Table 41 Data from Auxiliary Table 2. 10.17182/hepdata.83011.v3/t41 Cutflow for the$(m_{\tilde{t}}, m_{\tilde{\chi}}) = (500,420)$GeV signal point for signal region SR2. • #### Table 42 Data from Auxiliary Table 3. 10.17182/hepdata.83011.v3/t42 Cutflow for the$(m_{\tilde{t}}, m_{\tilde{\chi}}) = (500,350)$GeV signal point for signal region SR3. • #### Table 43 Data from Auxiliary Table 4. 10.17182/hepdata.83011.v3/t43 Cutflow for the$(m_{\tilde{t}}, m_{\tilde{\chi}}) = (600,350)$GeV signal point for signal region SR4. • #### Table 44 Data from Auxiliary Table 5. 10.17182/hepdata.83011.v3/t44 Cutflow for the$(m_{\tilde{t}}, m_{\tilde{\chi}}) = (900,1)\$ GeV signal point for signal region SR5.

Version 3 modifications: Fix an issue with the detector efficiency numbers.