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Search for higgsinos decaying to two Higgs bosons and missing transverse momentum in proton-proton collisions at $\sqrt{s}$ = 13 TeV

The CMS collaboration
CMS-SUS-20-004, 2022.

Abstract (data abstract)
Results are presented from a search for physics beyond the standard model in proton-proton collisions at $\sqrt{s}=13$ TeV in channels with two Higgs bosons, each decaying via the process H$\to b\overline{b}$, and large missing transverse momentum. The search uses a data sample corresponding to an integrated luminosity of 137 fb$^{-1}$ collected by the CMS experiment at the CERN LHC. The search is motivated by models of supersymmetry that predict the production of neutralinos, the neutral partners of the electroweak gauge and Higgs bosons. The observed event yields in the signal regions are found to be consistent with the standard model background expectations. The results are interpreted using simplified models of supersymmetry. For the electroweak production of nearly degenerate higgsinos, each of whose decay chains yields a neutralino ($\widetilde{\chi}^0_1$) that in turn decays to a massless goldstino and a Higgs boson, $\widetilde{\chi}^0_1$ masses in the range 175 to 1025 GeV are excluded at 95\% confidence level. For the strong production of gluino pairs decaying via a slightly lighter $\widetilde{\chi}^0_2$ to H and a light $\widetilde{\chi}^0_1$, gluino masses below 2330 GeV are excluded.

  • Results

    Data from Figure 10

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    Predicted background and observed yields vs bin index

  • Xsec limits, TChiHH-G

    Data from Figure 11

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    Cross section 95% CL upper limit vs m($\widetilde{\chi}^0_1$) for SMS model TChiHH-G.

  • TChiHH-G_th

    Data from Figure 11

    10.17182/hepdata.114414.v1/t3

    Theory cross sections vs m($\widetilde{\chi}^0_1$) for SMS model TChiHH-G.

  • TChiHH-G_th_N1N2

    Data from Figure 11

    10.17182/hepdata.114414.v1/t4

    Theory cross sections vs m($\widetilde{\chi}^0_1$) for SMS model TChiHH-G, $\widetilde{\chi}^0_1, \widetilde{\chi}^0_2$ NLSPs only.

  • Xsec limits, TChiHH

    Data from Figure 13.

    10.17182/hepdata.114414.v1/t5

    The 95% CL observed and expected upper limits on the production cross sections of the TChiHH signal model as a...

  • TChiHH observed mass limit curve

    Data from Figure 13.

    10.17182/hepdata.114414.v1/t6

    Exclusion limits assuming the approximate-NNLO+NNLL cross sections

  • TChiHH observed + 1 s.d.(theory) mass limit curve

    Data from Figure 13.

    10.17182/hepdata.114414.v1/t7

    Exclusion limits assuming the approximate-NNLO+NNLL cross sections

  • TChiHH expected mass limit curve

    Data from Figure 13.

    10.17182/hepdata.114414.v1/t8

    Exclusion limits assuming the approximate-NNLO+NNLL cross sections

  • TChiHH expected + 1 s.d. mass limit curve

    Data from Figure 13.

    10.17182/hepdata.114414.v1/t9

    Exclusion limits assuming the approximate-NNLO+NNLL cross sections

  • TChiHH expected + 2 s.d. mass limit curve

    Data from Figure 13.

    10.17182/hepdata.114414.v1/t10

    Exclusion limits assuming the approximate-NNLO+NNLL cross sections

  • TChiHH expected - 1 s.d. mass limit curve

    Data from Figure 13.

    10.17182/hepdata.114414.v1/t11

    Exclusion limits assuming the approximate-NNLO+NNLL cross sections

  • Xsec limits, T5HH

    Data from Figure 14

    10.17182/hepdata.114414.v1/t12

    Cross section, 95% CL upper limit plus theory vs m($\widetilde{g}$) for SMS model T5HH.

  • Covariance matrix

    Data from Additional Figure 6-a.

    10.17182/hepdata.114414.v1/t13

    Pre-fit background covariance matrix $\sigma_{xy}$ for the 22 analysis bins, ordered as in Fig. 10.

  • Correlation matrix

    Data from Additional Figure 6-b.

    10.17182/hepdata.114414.v1/t14

    Pre-fit background correlation matrix $\rho_{xy}$ for the 22 analysis bins, ordered as in Fig. 10.

  • Significance, TChiHH

    Data from Additional Figure 2a

    10.17182/hepdata.114414.v1/t15

    Significance vs $(m(\widetilde{\chi}^0_2), m(\widetilde{\chi}^0_1))$ for SMS model TChiHH.

  • Significance, T5HH

    Data from Additional Figure 2b

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    Significance vs $m(\widetilde{g})$ for SMS model T5HH.

  • Efficiency, TChiHH-G

    Data from Additional Figure 3a

    10.17182/hepdata.114414.v1/t17

    Efficiency vs $m(\widetilde{\chi}^0_1)$ for SMS model TChiHH-G, $\mathcal{B}(\mathrm{H}$-->$\mathrm{b}\overline{\mathrm{b}})=100\%$.

  • Efficiency, T5HH

    Data from Additional Figure 3b

    10.17182/hepdata.114414.v1/t18

    Efficiency vs $m(\widetilde{g})$ for SMS model T5HH.

  • Efficiency, TChiHH

    Data from Additional Figure 4c

    10.17182/hepdata.114414.v1/t19

    Efficiency vs $(m(\widetilde{\chi}^0_2), m(\widetilde{\chi}^0_1))$ for SMS model TChiHH.

  • Signal and control region yields for resolved signature

    Data from Additional Table 3

    10.17182/hepdata.114414.v1/t20

    Signal and control region populations for the resolved signature.

  • Signal and control region yields for boosted signature

    Data from Additional Table 4

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    Signal and control region populations for the boosted signature.

  • Cut flow for resolved signature, TChHH-G and TChiHH models

    Data from Additional Table 5

    10.17182/hepdata.114414.v1/t22

    Cut flow table for the resolved topology showing expected event yields at 137 fb$^{-1}$ for selected signal models as successive...

  • Cut flow for boosted signature, T5HH model

    Data from Additional Table 6

    10.17182/hepdata.114414.v1/t23

    Cut flow table for the boosted topology showing expected event yields at 137 fb$^{-1}$ for selected signal model points as...

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