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

The ATLAS 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

    10.17182/hepdata.74005.v1/t1

    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

    10.17182/hepdata.74005.v1/t2

    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

    10.17182/hepdata.74005.v1/t3

    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

    10.17182/hepdata.74005.v1/t4

    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

    10.17182/hepdata.74005.v1/t6

    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

    10.17182/hepdata.74005.v1/t7

    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

    10.17182/hepdata.74005.v1/t27

    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

    10.17182/hepdata.74005.v1/t32

    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...

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