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Search for bottom squark pair production in proton–proton collisions at $\sqrt{s}=13$  TeV with the ATLAS detector

The collaboration
Eur.Phys.J. C76 (2016) 547, 2016

Abstract (data abstract)
CERN-LHC. The result of a search for pair production of the supersymmetric partner of the Standard Model bottom quark ($\tilde{b}_1$) is reported. The search uses 3.2 fb$^{-1}$ of $pp$ collisions at $\sqrt{s}=$13 TeV collected by the ATLAS experiment at the Large Hadron Collider in 2015. Bottom squarks are searched for in events containing large missing transverse momentum and exactly two jets identified as originating from $b$-quarks. No excess above the expected Standard Model background yield is observed. Exclusion limits at 95% confidence level on the mass of the bottom squark are derived in phenomenological supersymmetric $R$-parity-conserving models in which the $\tilde{b}_1$ is the lightest squark and is assumed to decay exclusively via $\tilde{b}_1 \rightarrow b \tilde{\chi}_1^0$, where $\tilde{\chi}_1^0$ is the lightest neutralino. The limits significantly extend previous results; bottom squark masses up to 800 (840) GeV are excluded for the $\tilde{\chi}_1^0$ mass below 360 (100) GeV whilst differences in mass above 100 GeV between the $\tilde{b}_1$ and the $\tilde{\chi}_1^0$ are excluded up to a $\tilde{b}_1$ mass of 500 GeV.

• #### Table 1

Data from Figure 4

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Expected exclusion limit at 95% CL in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario.

• #### Table 2

Data from Figure 4

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Observed exclusion limit at 95% CL in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario.

• #### Table 3

Data from Auxiliary Figure 2

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Signal region (SR) providing the best expected sensitivity in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane.

• #### Table 4

Data from Auxiliary Figure 3a

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Cross-section upper limit in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the best expected signal region.

• #### Table 5

Data from Auxiliary Figure 3b

10.17182/hepdata.74005.v1/t5

Cross-section upper limit in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the SRA250 signal region.

• #### Table 6

Data from Auxiliary Figure 3c

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Cross-section upper limit in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the SRA350 signal region.

• #### Table 7

Data from Auxiliary Figure 3d

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Cross-section upper limit in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the SRA450 signal region.

• #### Table 8

Data from Auxiliary Figure 3e

10.17182/hepdata.74005.v1/t8

Cross-section upper limit in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the SRB signal region.

• #### Table 9

Data from Auxiliary Figure 4a

10.17182/hepdata.74005.v1/t9

Expected CLs values in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the best expected signal region.

• #### Table 10

Data from Auxiliary Figure 4b

10.17182/hepdata.74005.v1/t10

Expected CLs values in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the SRA250 signal region.

• #### Table 11

Data from Auxiliary Figure 4b

10.17182/hepdata.74005.v1/t11

Expected exclusion limit at 95% CL in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario, for signal region...

• #### Table 12

Data from Auxiliary Figure 4b

10.17182/hepdata.74005.v1/t12

Observed exclusion limit at 95% CL in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario, for signal region...

• #### Table 13

Data from Auxiliary Figure 4c

10.17182/hepdata.74005.v1/t13

Expected CLs values in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the SRA350 signal region.

• #### Table 14

Data from Auxiliary Figure 4c

10.17182/hepdata.74005.v1/t14

Expected exclusion limit at 95% CL in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario, for signal region...

• #### Table 15

Data from Auxiliary Figure 4c

10.17182/hepdata.74005.v1/t15

Observed exclusion limit at 95% CL in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario, for signal region...

• #### Table 16

Data from Auxiliary Figure 4d

10.17182/hepdata.74005.v1/t16

Expected CLs values in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the SRA450 signal region.

• #### Table 17

Data from Auxiliary Figure 4d

10.17182/hepdata.74005.v1/t17

Expected exclusion limit at 95% CL in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario, for signal region...

• #### Table 18

Data from Auxiliary Figure 4d

10.17182/hepdata.74005.v1/t18

Observed exclusion limit at 95% CL in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario, for signal region...

• #### Table 19

Data from Auxiliary Figure 4e

10.17182/hepdata.74005.v1/t19

Expected CLs values in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the SRB signal region.

• #### Table 20

Data from Auxiliary Figure 4e

10.17182/hepdata.74005.v1/t20

Expected exclusion limit at 95% CL in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario, for signal region...

• #### Table 21

Data from Auxiliary Figure 4e

10.17182/hepdata.74005.v1/t21

Observed exclusion limit at 95% CL in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario, for signal region...

• #### Table 22

Data from Auxiliary Figure 5a

10.17182/hepdata.74005.v1/t22

Observed CLs values in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the best expected signal region.

• #### Table 23

Data from Auxiliary Figure 5b

10.17182/hepdata.74005.v1/t23

Observed CLs values in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the SRA250 signal region.

• #### Table 24

Data from Auxiliary Figure 5c

10.17182/hepdata.74005.v1/t24

Observed CLs values in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the SRA350 signal region.

• #### Table 25

Data from Auxiliary Figure 5d

10.17182/hepdata.74005.v1/t25

Observed CLs values in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the SRA450 signal region.

• #### Table 26

Data from Auxiliary Figure 5e

10.17182/hepdata.74005.v1/t26

Observed CLs values in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the SRB signal region.

• #### Table 27

Data from Auxiliary Figure 6a

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Signal efficiency (in %) in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario, for the best expected signal...

• #### Table 28

Data from Auxiliary Figure 6b

10.17182/hepdata.74005.v1/t28

Signal efficiency (in %) in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario, for the SRA250 signal region.

• #### Table 29

Data from Auxiliary Figure 6c

10.17182/hepdata.74005.v1/t29

Signal efficiency (in %) in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario, for the SRA350 signal region.

• #### Table 30

Data from Auxiliary Figure 6d

10.17182/hepdata.74005.v1/t30

Signal efficiency (in %) in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario, for the SRA450 signal region.

• #### Table 31

Data from Auxiliary Figure 6e

10.17182/hepdata.74005.v1/t31

Signal efficiency (in %) in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario, for the SRB signal region.

• #### Table 32

Data from Auxiliary Figure 7a

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Signal acceptance (in %) in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario, for the best expected signal...

• #### Table 33

Data from Auxiliary Figure 7b

10.17182/hepdata.74005.v1/t33

Signal acceptance (in %) in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario, for the SRA250 signal region.

• #### Table 34

Data from Auxiliary Figure 7c

10.17182/hepdata.74005.v1/t34

Signal acceptance (in %) in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario, for the SRA350 signal region.

• #### Table 35

Data from Auxiliary Figure 7d

10.17182/hepdata.74005.v1/t35

Signal acceptance (in %) in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario, for the SRA450 signal region.

• #### Table 36

Data from Auxiliary Figure 7e

10.17182/hepdata.74005.v1/t36

Signal acceptance (in %) in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane for the sbottom pair production scenario, for the SRB signal region.

• #### Table 37

Data from Auxiliary Figure 8

10.17182/hepdata.74005.v1/t37

Total experimental systematic uncertainty in percent on the signal efficiency times acceptance in the $m(\tilde b_1)$-$m(\tilde\chi^0_1)$ plane. The best expected...