Search for pair production of higgsinos in events with two Higgs bosons and missing transverse momentum in $\sqrt{s}=13$ TeV $pp$ collisions at the ATLAS experiment

The ATLAS collaboration
Phys.Rev.D 109 (2024) 112011, 2024.

Abstract (data abstract)
This paper presents a search for pair production of higgsinos, the supersymmetric partners of the Higgs bosons, in scenarios with gauge-mediated supersymmetry breaking. Each higgsino is assumed to decay into a Higgs boson and a nearly-massless gravitino. The search targets the decay of the two Higgs bosons to $b\bar{b}$, leading to a reconstructed final state with at least three energetic $b$-jets and missing transverse momentum. Two complementary analysis channels are used, with each channel specifically targeting either low or high values of the higgsino mass. The low (high) mass channel exploits 126 (139) fb$^{-1}$ of $\sqrt{s}=13$ TeV data collected by the ATLAS detector during Run 2 of the Large Hadron Collider. No significant excess above the Standard Model prediction is found. At 95% confidence level, masses up to 940 GeV are excluded for higgsinos decaying exclusively to Higgs bosons. Exclusion limits as a function of the higgsino decay branching ratio to a Higgs boson are also reported.

  • Yield table for 250 GeV high-mass regions

    Data from Figure 9

    10.17182/hepdata.136030.v1/t1

    Post-fit SR yields of the high-mass channel. The upper panel shows the observed number of events, as well the post-fit...

  • Yield table for 300 GeV high-mass regions

    Data from Figure 9

    10.17182/hepdata.136030.v1/t2

    Post-fit SR yields of the high-mass channel. The upper panel shows the observed number of events, as well the post-fit...

  • Yield table for 400 GeV high-mass regions

    Data from Figure 9

    10.17182/hepdata.136030.v1/t3

    Post-fit SR yields of the high-mass channel. The upper panel shows the observed number of events, as well the post-fit...

  • Yield table for 500 GeV high-mass regions

    Data from Figure 9

    10.17182/hepdata.136030.v1/t4

    Post-fit SR yields of the high-mass channel. The upper panel shows the observed number of events, as well the post-fit...

  • Yield table for 600 GeV high-mass regions

    Data from Figure 9

    10.17182/hepdata.136030.v1/t5

    Post-fit SR yields of the high-mass channel. The upper panel shows the observed number of events, as well the post-fit...

  • Yield table for 700 GeV high-mass regions

    Data from Figure 9

    10.17182/hepdata.136030.v1/t6

    Post-fit SR yields of the high-mass channel. The upper panel shows the observed number of events, as well the post-fit...

  • Yield table for 800 GeV high-mass regions

    Data from Figure 9

    10.17182/hepdata.136030.v1/t7

    Post-fit SR yields of the high-mass channel. The upper panel shows the observed number of events, as well the post-fit...

  • Yield table for 900 GeV high-mass regions

    Data from Figure 9

    10.17182/hepdata.136030.v1/t8

    Post-fit SR yields of the high-mass channel. The upper panel shows the observed number of events, as well the post-fit...

  • Yield table for 1000 GeV high-mass regions

    Data from Figure 9

    10.17182/hepdata.136030.v1/t9

    Post-fit SR yields of the high-mass channel. The upper panel shows the observed number of events, as well the post-fit...

  • Yield table for 1100 GeV high-mass regions

    Data from Figure 9

    10.17182/hepdata.136030.v1/t10

    Post-fit SR yields of the high-mass channel. The upper panel shows the observed number of events, as well the post-fit...

  • Yield table for 2016 low-mass exclusion region

    Data from Figure 11a

    10.17182/hepdata.136030.v1/t11

    Pre-fit data and background (reweighted $2b$) predictions for each $4b$ SR $E_\text{T}^\text{miss}$ and $m_\text{eff}$ bin of the low-mass channel for...

  • Yield table for 2017 low-mass exclusion region

    Data from Figure 11b

    10.17182/hepdata.136030.v1/t12

    Pre-fit data and background (reweighted $2b$) predictions for each $4b$ SR $E_\text{T}^\text{miss}$ and $m_\text{eff}$ bin of the low-mass channel for...

  • Yield table for 2018 low-mass exclusion region

    Data from Figure 11c

    10.17182/hepdata.136030.v1/t13

    Pre-fit data and background (reweighted $2b$) predictions for each $4b$ SR $E_\text{T}^\text{miss}$ and $m_\text{eff}$ bin of the low-mass channel for...

  • Limits for combined

    Data from Figure 12a

    10.17182/hepdata.136030.v1/t14

    Exclusion limits of the low-mass and high-mass channels. The low-mass channel is used for $m_{\tilde{H}}<250$ GeV while the high-mass channel...

  • +1$\sigma$ limits for combined

    Data from Figure 12a

    10.17182/hepdata.136030.v1/t15

    Exclusion limits of the low-mass and high-mass channels. The low-mass channel is used for $m_{\tilde{H}}<250$ GeV while the high-mass channel...

  • -1$\sigma$ limits for combined

    Data from Figure 12a

    10.17182/hepdata.136030.v1/t16

    Exclusion limits of the low-mass and high-mass channels. The low-mass channel is used for $m_{\tilde{H}}<250$ GeV while the high-mass channel...

  • +2$\sigma$ limits for combined

    Data from Figure 12a

    10.17182/hepdata.136030.v1/t17

    Exclusion limits of the low-mass and high-mass channels. The low-mass channel is used for $m_{\tilde{H}}<250$ GeV while the high-mass channel...

  • -2$\sigma$ limits for combined

    Data from Figure 12a

    10.17182/hepdata.136030.v1/t18

    Exclusion limits of the low-mass and high-mass channels. The low-mass channel is used for $m_{\tilde{H}}<250$ GeV while the high-mass channel...

  • Limits over theory for combined

    Data from Figure 12a

    10.17182/hepdata.136030.v1/t19

    Exclusion limits of the low-mass and high-mass channels. The low-mass channel is used for $m_{\tilde{H}}<250$ GeV while the high-mass channel...

  • +1$\sigma$ limits over theory for combined

    Data from Figure 12a

    10.17182/hepdata.136030.v1/t20

    Exclusion limits of the low-mass and high-mass channels. The low-mass channel is used for $m_{\tilde{H}}<250$ GeV while the high-mass channel...

  • -1$\sigma$ limits over theory for combined

    Data from Figure 12a

    10.17182/hepdata.136030.v1/t21

    Exclusion limits of the low-mass and high-mass channels. The low-mass channel is used for $m_{\tilde{H}}<250$ GeV while the high-mass channel...

  • +2$\sigma$ limits over theory for combined

    Data from Figure 12a

    10.17182/hepdata.136030.v1/t22

    Exclusion limits of the low-mass and high-mass channels. The low-mass channel is used for $m_{\tilde{H}}<250$ GeV while the high-mass channel...

  • -2$\sigma$ limits over theory for combined

    Data from Figure 12a

    10.17182/hepdata.136030.v1/t23

    Exclusion limits of the low-mass and high-mass channels. The low-mass channel is used for $m_{\tilde{H}}<250$ GeV while the high-mass channel...

  • Limits for BR

    Data from Figure 12b

    10.17182/hepdata.136030.v1/t24

    Exclusion limits of the low-mass and high-mass channels. The low-mass channel is used for $m_{\tilde{H}}<250$ GeV while the high-mass channel...

  • +1$\sigma$ limits for BR

    Data from Figure 12b

    10.17182/hepdata.136030.v1/t25

    Exclusion limits of the low-mass and high-mass channels. The low-mass channel is used for $m_{\tilde{H}}<250$ GeV while the high-mass channel...

  • -1$\sigma$ limits for BR

    Data from Figure 12b

    10.17182/hepdata.136030.v1/t26

    Exclusion limits of the low-mass and high-mass channels. The low-mass channel is used for $m_{\tilde{H}}<250$ GeV while the high-mass channel...

  • +2$\sigma$ limits for BR

    Data from Figure 12b

    10.17182/hepdata.136030.v1/t27

    Exclusion limits of the low-mass and high-mass channels. The low-mass channel is used for $m_{\tilde{H}}<250$ GeV while the high-mass channel...

  • -2$\sigma$ limits for BR

    Data from Figure 12b

    10.17182/hepdata.136030.v1/t28

    Exclusion limits of the low-mass and high-mass channels. The low-mass channel is used for $m_{\tilde{H}}<250$ GeV while the high-mass channel...

  • Limits for low-mass

    Data from auxiliary material Figure 1a

    10.17182/hepdata.136030.v1/t29

    Exclusion limits of the low-mass channel. The plot shows the observed (solid) and expected (dashed) 95% CL upper limits on...

  • Limits over theory for low-mass

    Data from auxiliary material Figure 1a

    10.17182/hepdata.136030.v1/t30

    Exclusion limits of the low-mass channel. The plot shows the observed (solid) and expected (dashed) 95% CL upper limits on...

  • Limits for high-mass

    Data from auxiliary material Figure 1b

    10.17182/hepdata.136030.v1/t31

    Exclusion limits of the high-mass channel. The plot shows the observed (solid) and expected (dashed) 95% CL upper limits on...

  • Limits over theory for high-mass

    Data from auxiliary material Figure 1b

    10.17182/hepdata.136030.v1/t32

    Exclusion limits of the high-mass channel. The plot shows the observed (solid) and expected (dashed) 95% CL upper limits on...

  • Yield table for SR_LM_150

    Data from auxiliary material Table 1

    10.17182/hepdata.136030.v1/t33

    Results of the background-only fit in the low-mass channel discovery region SR_LM_150. Both pre-fit and post-fit values are shown.

  • Yield table for SR_LM_300

    Data from auxiliary material Table 1

    10.17182/hepdata.136030.v1/t34

    Results of the background-only fit in the low-mass channel discovery region SR_LM_300. Both pre-fit and post-fit values are shown.

  • Efficiency for low-mass

    Data from auxiliary material Figure 2

    10.17182/hepdata.136030.v1/t35

    The experimental efficiency of the low-mass channel for the exclusion and discovery signal regions as a function of higgsino mass....

  • Acceptance for low-mass

    Data from auxiliary material Figure 3

    10.17182/hepdata.136030.v1/t36

    The particle-level acceptance for the low-mass exclusion and discovery signal regions, shown as a function of higgsino mass. The acceptance...

  • Efficiency for high-mass

    Data from auxiliary material Figure 4

    10.17182/hepdata.136030.v1/t37

    The experimental efficiency of the high-mass channel discovery regions as a function of higgsino mass. For each higgsino mass, the...

  • Acceptance for high-mass

    Data from auxiliary material Figure 5

    10.17182/hepdata.136030.v1/t38

    The particle-level acceptance for the high-mass signal regions, shown as a function of higgsino mass. For each higgsino mass, the...

  • Cutflow for low-mass 130 GeV sample

    Data from auxiliary material Table 2

    10.17182/hepdata.136030.v1/t39

    Cutflow for the low-mass channel for a representative 130 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for low-mass 150 GeV sample

    Data from auxiliary material Table 3

    10.17182/hepdata.136030.v1/t40

    Cutflow for the low-mass channel for a representative 150 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for low-mass 200 GeV sample

    Data from auxiliary material Table 4

    10.17182/hepdata.136030.v1/t41

    Cutflow for the low-mass channel for a representative 200 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for low-mass 250 GeV sample

    Data from auxiliary material Table 5

    10.17182/hepdata.136030.v1/t42

    Cutflow for the low-mass channel for a representative 250 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for low-mass 300 GeV sample

    Data from auxiliary material Table 6

    10.17182/hepdata.136030.v1/t43

    Cutflow for the low-mass channel for a representative 300 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for low-mass 400 GeV sample

    Data from auxiliary material Table 7

    10.17182/hepdata.136030.v1/t44

    Cutflow for the low-mass channel for a representative 400 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for low-mass 500 GeV sample

    Data from auxiliary material Table 8

    10.17182/hepdata.136030.v1/t45

    Cutflow for the low-mass channel for a representative 500 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for low-mass 600 GeV sample

    Data from auxiliary material Table 9

    10.17182/hepdata.136030.v1/t46

    Cutflow for the low-mass channel for a representative 600 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for low-mass 700 GeV sample

    Data from auxiliary material Table 10

    10.17182/hepdata.136030.v1/t47

    Cutflow for the low-mass channel for a representative 700 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for low-mass 800 GeV sample

    Data from auxiliary material Table 11

    10.17182/hepdata.136030.v1/t48

    Cutflow for the low-mass channel for a representative 800 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for low-mass 900 GeV sample

    Data from auxiliary material Table 12

    10.17182/hepdata.136030.v1/t49

    Cutflow for the low-mass channel for a representative 900 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for low-mass 1000 GeV sample

    Data from auxiliary material Table 13

    10.17182/hepdata.136030.v1/t50

    Cutflow for the low-mass channel for a representative 1000 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for low-mass 1100 GeV sample

    Data from auxiliary material Table 14

    10.17182/hepdata.136030.v1/t51

    Cutflow for the low-mass channel for a representative 1100 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for high-mass 200 GeV sample

    Data from auxiliary material Table 15

    10.17182/hepdata.136030.v1/t52

    Cutflow for the high-mass channel for a representative 200 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for high-mass 250 GeV sample

    Data from auxiliary material Table 16

    10.17182/hepdata.136030.v1/t53

    Cutflow for the high-mass channel for a representative 250 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for high-mass 300 GeV sample

    Data from auxiliary material Table 17

    10.17182/hepdata.136030.v1/t54

    Cutflow for the high-mass channel for a representative 300 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for high-mass 400 GeV sample

    Data from auxiliary material Table 18

    10.17182/hepdata.136030.v1/t55

    Cutflow for the high-mass channel for a representative 400 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for high-mass 500 GeV sample

    Data from auxiliary material Table 19

    10.17182/hepdata.136030.v1/t56

    Cutflow for the high-mass channel for a representative 500 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for high-mass 600 GeV sample

    Data from auxiliary material Table 20

    10.17182/hepdata.136030.v1/t57

    Cutflow for the high-mass channel for a representative 600 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for high-mass 700 GeV sample

    Data from auxiliary material Table 21

    10.17182/hepdata.136030.v1/t58

    Cutflow for the high-mass channel for a representative 700 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for high-mass 800 GeV sample

    Data from auxiliary material Table 22

    10.17182/hepdata.136030.v1/t59

    Cutflow for the high-mass channel for a representative 800 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for high-mass 900 GeV sample

    Data from auxiliary material Table 23

    10.17182/hepdata.136030.v1/t60

    Cutflow for the high-mass channel for a representative 900 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for high-mass 1000 GeV sample

    Data from auxiliary material Table 24

    10.17182/hepdata.136030.v1/t61

    Cutflow for the high-mass channel for a representative 1000 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for high-mass 1100 GeV sample

    Data from auxiliary material Table 25

    10.17182/hepdata.136030.v1/t62

    Cutflow for the high-mass channel for a representative 1100 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for high-mass 1200 GeV sample

    Data from auxiliary material Table 26

    10.17182/hepdata.136030.v1/t63

    Cutflow for the high-mass channel for a representative 1200 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for high-mass 1300 GeV sample

    Data from auxiliary material Table 27

    10.17182/hepdata.136030.v1/t64

    Cutflow for the high-mass channel for a representative 1300 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for high-mass 1400 GeV sample

    Data from auxiliary material Table 28

    10.17182/hepdata.136030.v1/t65

    Cutflow for the high-mass channel for a representative 1400 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

  • Cutflow for high-mass 1500 GeV sample

    Data from auxiliary material Table 29

    10.17182/hepdata.136030.v1/t66

    Cutflow for the high-mass channel for a representative 1500 GeV signal. The preselection requires 4 or more jets with $p_\text{T}>25$...

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