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Combination of searches for Higgs boson pairs in $pp$ collisions at $\sqrt{s} = $13 TeV with the ATLAS detector

The ATLAS collaboration
2019.

Abstract (data abstract)
This letter presents a combination of searches for Higgs boson pair production using up to 36.1 fb-1 of proton-proton collision data at a centre-of-mass energy $\sqrt{s}$ = 13 TeV recorded with the ATLAS detector at the LHC. The combination is performed using six analyses searching for Higgs boson pairs decaying into the bbbb, bbWW, bb$\tau\tau$, WWWW, bb$\gamma\gamma$ and WW$\gamma\gamma$ final states. Results are presented for non-resonant and resonant Higgs boson pair production modes. The combined observed limit at 95% confidence level on the non-resonant Higgs boson pair production cross-section is 6.9 times the predicted Standard Model cross-section. Limits are also set on the ratio ($\kappa_{\lambda}$) of the Higgs boson self-coupling to its Standard Model value. This ratio is constrained at 95% confidence level to -5.0$<\kappa_{\lambda}<$12.0. In addition, limits are set on the production of narrow scalar resonances and spin-2 Kaluza-Klein Randall-Sundrum gravitons. Exclusion regions are also provided in the parameter space of the habemus Minimal Supersymmetric Standard Model and the Electroweak Singlet Model.

  • Signal acceptance times efficiency

    Data from Figs. 4 (a)

    10.17182/hepdata.90521.v1/t1

    Signal acceptance times efficiency as a function of &kappa;<sub>&lambda;</sub> for the $b\bar{b}b\bar{b}$, $b\bar{b}\tau^{+}\tau^{-}$ and $b\bar{b}\gamma\gamma$ analyses. The $b\bar{b}b\bar{b}$ curve is...

  • Cross-section upper limits at fixed &kappa;<sub>&lambda;</sub>

    Data from Figs. 4 (b)

    10.17182/hepdata.90521.v1/t2

    Upper limits at 95% CL on the cross-section of the ggF non-resonant SM HH production as a function of &kappa;<sub>&lambda;</sub>....

  • Spin-0 cross-section upper limits of bbbb

    Data from Figs. 5 (a)

    10.17182/hepdata.90521.v1/t3

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-0 heavy scalar

  • Spin-0 cross-section upper limits of bbtautau

    Data from Figs. 5 (a)

    10.17182/hepdata.90521.v1/t4

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-0 heavy scalar

  • Spin-0 cross-section upper limits of bbWW

    Data from Figs. 5 (a)

    10.17182/hepdata.90521.v1/t5

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-0 heavy scalar

  • Spin-0 cross-section upper limits of bbgammagamma

    Data from Figs. 5 (a)

    10.17182/hepdata.90521.v1/t6

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-0 heavy scalar

  • Spin-0 cross-section upper limits of WWWW

    Data from Figs. 5 (a)

    10.17182/hepdata.90521.v1/t7

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-0 heavy scalar

  • Spin-0 cross-section upper limits of WWgammagamma

    Data from Figs. 5 (a)

    10.17182/hepdata.90521.v1/t8

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-0 heavy scalar

  • Spin-0 cross-section upper limits of combination in low mass

    Data from Figs. 5 (a)

    10.17182/hepdata.90521.v1/t9

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-0 heavy scalar

  • Spin-0 cross-section upper limits of combination in mid mass

    Data from Figs. 5 (a)

    10.17182/hepdata.90521.v1/t10

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-0 heavy scalar

  • Spin-0 cross-section upper limits of combination in high mass

    Data from Figs. 5 (a)

    10.17182/hepdata.90521.v1/t11

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-0 heavy scalar

  • Spin-2 c1 cross-section upper limits of bbbb

    Data from Figs. 5 (b)

    10.17182/hepdata.90521.v1/t12

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-2 KK graviton...

  • Spin-2 c1 cross-section upper limits of bbtautau

    Data from Figs. 5 (b)

    10.17182/hepdata.90521.v1/t13

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-2 KK graviton...

  • Spin-2 c1 cross-section upper limits of bbWW

    Data from Figs. 5 (b)

    10.17182/hepdata.90521.v1/t14

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-2 KK graviton...

  • Spin-2 c1 cross-section upper limits of combination in low mass

    Data from Figs. 5 (b)

    10.17182/hepdata.90521.v1/t15

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-2 KK graviton...

  • Spin-2 c1 cross-section upper limits of combination in mid mass

    Data from Figs. 5 (b)

    10.17182/hepdata.90521.v1/t16

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-2 KK graviton...

  • Spin-2 c1 cross-section upper limits of combination in high mass

    Data from Figs. 5 (b)

    10.17182/hepdata.90521.v1/t17

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-2 KK graviton...

  • Spin-2 c2 cross-section upper limits of bbbb

    Data from Figs. 5 (c)

    10.17182/hepdata.90521.v1/t18

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-2 KK graviton...

  • Spin-2 c2 cross-section upper limits of bbtautau

    Data from Figs. 5 (c)

    10.17182/hepdata.90521.v1/t19

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-2 KK graviton...

  • Spin-2 c2 cross-section upper limits of bbWW

    Data from Figs. 5 (c)

    10.17182/hepdata.90521.v1/t20

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-2 KK graviton...

  • Spin-2 c2 cross-section upper limits of combination in low mass

    Data from Figs. 5 (c)

    10.17182/hepdata.90521.v1/t21

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-2 KK graviton...

  • Spin-2 c2 cross-section upper limits of combination in mid mass

    Data from Figs. 5 (c)

    10.17182/hepdata.90521.v1/t22

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-2 KK graviton...

  • Spin-2 c2 cross-section upper limits of combination in high mass

    Data from Figs. 5 (c)

    10.17182/hepdata.90521.v1/t23

    Upper limits at 95% CL on the cross-section of the resonant Higgs boson pair production for a spin-2 KK graviton...

  • Expected EWK-singlet exclusion with tan&beta;=1

    Data from Figs. 6 (a)

    10.17182/hepdata.90521.v1/t24

    Expected exclusion regions for the EWK-singlet model for tan &beta; = 1. The theoretical contour points with width over mass...

  • Observed EWK-singlet exclusion with tan&beta;=1

    Data from Figs. 6 (a)

    10.17182/hepdata.90521.v1/t25

    Observed exclusion regions for the EWK-singlet model for tan &beta; = 1. The theoretical contour points with width over mass...

  • Expected EWK-singlet exclusion with tan&beta;=2

    Data from Figs. 6 (b)

    10.17182/hepdata.90521.v1/t26

    Expected exclusion regions for the EWK-singlet model for tan &beta; = 2. The theoretical contour points with width over mass...

  • Observed EWK-singlet exclusion with tan&beta;=2

    Data from Figs. 6 (b)

    10.17182/hepdata.90521.v1/t27

    Observed exclusion regions for the EWK-singlet model for tan &beta; = 2. The theoretical contour points with width over mass...

  • Expected EWK-singlet exclusion with mS=260GeV

    Data from Figs. 7 (a)

    10.17182/hepdata.90521.v1/t28

    Expected exclusion regions in the EWK-singlet model for m<sub>S</sub>= 260 GeV. The theoretical contour points with width over mass of...

  • Observed EWK-singlet exclusion with mS=260GeV

    Data from Figs. 7 (a)

    10.17182/hepdata.90521.v1/t29

    Observed exclusion regions in the EWK-singlet model for m<sub>S</sub>= 260 GeV. The theoretical contour points with width over mass of...

  • Expected hMSSM exclusion

    Data from Figs. 7 (b)

    10.17182/hepdata.90521.v1/t30

    Expected exclusion regions in the hMSSM model

  • Expected hMSSM exclusion (-1 sigma band)

    Data from Figs. 7 (b)

    10.17182/hepdata.90521.v1/t31

    Expected exclusion regions (-1 sigma band) in the hMSSM model

  • Expected hMSSM exclusion (+1 sigma band)

    Data from Figs. 7 (b)

    10.17182/hepdata.90521.v1/t32

    Expected exclusion regions (+1 sigma band) in the hMSSM model

  • Observed hMSSM exclusion

    Data from Figs. 7 (b)

    10.17182/hepdata.90521.v1/t33

    Observed exclusion regions in the hMSSM model

  • Cross-section limits at fixed &kappa;<sub>&lambda;</sub> (stat)

    Data from Figs. 4 in auxiliary materials on https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2018-58/

    10.17182/hepdata.90521.v1/t34

    Upper limits at 95% CL on the signal cross-section of the ggF non-resonant Higgs boson pair production as a function...

  • Expected EWK-singlet exclusion with tan&beta;=5

    Data from Figs. 5 (a) in auxiliary materials on https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2018-58/

    10.17182/hepdata.90521.v1/t35

    Expected exclusion regions for the EWK-singlet model with tan &beta; = 5.0. The theoretical contour points with width over mass...

  • Observed EWK-singlet exclusion with tan&beta;=5

    Data from Figs. 5 (a) in auxiliary materials on https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2018-58/

    10.17182/hepdata.90521.v1/t36

    Observed exclusion regions for the EWK-singlet model with tan &beta; = 5.0. The theoretical contour points with width over mass...

  • Expected EWK-singlet exclusion with mS=300GeV

    Data from Figs. 5 (b) in auxiliary materials on https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2018-58/

    10.17182/hepdata.90521.v1/t37

    Expected exclusion regions for the EWK-singlet model with m<sub>S</sub> = 300 GeV. The theoretical contour points with width over mass...

  • Observed EWK-singlet exclusion with mS=300GeV

    Data from Figs. 5 (b) in auxiliary materials on https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2018-58/

    10.17182/hepdata.90521.v1/t38

    Observed exclusion regions for the EWK-singlet model with m<sub>S</sub> = 300 GeV. The theoretical contour points with width over mass...

  • Expected EWK-singlet exclusion with mS=400GeV

    Data from Figs. 5 (c) in auxiliary materials on https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2018-58/

    10.17182/hepdata.90521.v1/t39

    Expected exclusion regions for the EWK-singlet model with m<sub>S</sub> = 400 GeV. The theoretical contour points with width over mass...

  • Observed EWK-singlet exclusion with mS=400GeV

    Data from Figs. 5 (c) in auxiliary materials on https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2018-58/

    10.17182/hepdata.90521.v1/t40

    Observed exclusion regions for the EWK-singlet model with m<sub>S</sub> = 400 GeV. The theoretical contour points with width over mass...

  • Expected EWK-singlet exclusion with mS=500GeV

    Data from Figs. 5 (d) in auxiliary materials on https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2018-58/

    10.17182/hepdata.90521.v1/t41

    Expected exclusion regions for the EWK-singlet model with m<sub>S</sub> = 500 GeV. The theoretical contour points with width over mass...

  • Observed EWK-singlet exclusion with mS=500GeV

    Data from Figs. 5 (d) in auxiliary materials on https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2018-58/

    10.17182/hepdata.90521.v1/t42

    Observed exclusion regions for the EWK-singlet model with m<sub>S</sub> = 500 GeV. The theoretical contour points with width over mass...

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