Search for dark matter produced in association with a single top quark or a top quark pair in proton-proton collisions at $ \sqrt{s}=13 $ TeV

The CMS collaboration
JHEP 1903 (2019) 141, 2019

Abstract (data abstract)
A search for dark matter produced in association with top quarks in proton-proton collisions at a center-of-mass energy of 13 TeV is presented. The data set used corresponds to an integrated luminosity of 35.9 fb-1 recorded with the CMS detector at the LHC. Whereas previous searches for neutral scalar or pseudoscalar mediators considered dark matter production in association with a top quark pair only, this analysis also includes production modes with a single top quark. The results are derived from the combination of multiple selection categories that are defined to target either the single top quark or the top quark pair signature. No significant deviations with respect to the standard model predictions are observed. The results are interpreted in the context of a simplified model in which a scalar or pseudoscalar mediator particle couples to a top quark and subsequently decays into dark matter particles. Scalar and pseudoscalar mediator particles with masses below 290 and 300 GeV, respectively, are excluded at 95% confidence level, assuming a dark matter particle mass of 1 GeV and mediator couplings to fermions and dark matter particles equal to unity.

  • $p_{T}^{miss}$ in the SL $1\mu$ W CR

    Figure_002-a

    10.17182/hepdata.88882.v1/t1

    Background-only post-fit $p_{T}^{miss}$ distributions for the CRs of the SL selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the SL $1e$ W CR

    Figure_002-b

    10.17182/hepdata.88882.v1/t2

    Background-only post-fit $p_{T}^{miss}$ distributions for the CRs of the SL selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the SL $1e1\mu$ top CR

    Figure_002-c

    10.17182/hepdata.88882.v1/t3

    Background-only post-fit $p_{T}^{miss}$ distributions for the CRs of the SL selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the SL $2e$ top CR

    Figure_002-d

    10.17182/hepdata.88882.v1/t4

    Background-only post-fit $p_{T}^{miss}$ distributions for the CRs of the SL selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the SL $2\mu$ top CR

    Figure_002-e

    10.17182/hepdata.88882.v1/t5

    Background-only post-fit $p_{T}^{miss}$ distributions for the CRs of the SL selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the AH $1\mu$ top CR

    Figure_003-a

    10.17182/hepdata.88882.v1/t6

    Background-only post-fit $p_{T}^{miss}$ distributions for the CRs of the AH selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the AH $1e$ top CR

    Figure_003-b

    10.17182/hepdata.88882.v1/t7

    Background-only post-fit $p_{T}^{miss}$ distributions for the CRs of the AH selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the AH $1e$ W CR

    Figure_003-c

    10.17182/hepdata.88882.v1/t8

    Background-only post-fit $p_{T}^{miss}$ distributions for the CRs of the AH selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the AH $1\mu$ W CR

    Figure_003-d

    10.17182/hepdata.88882.v1/t9

    Background-only post-fit $p_{T}^{miss}$ distributions for the CRs of the AH selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the AH $2e$ Z CR

    Figure_003-e

    10.17182/hepdata.88882.v1/t10

    Background-only post-fit $p_{T}^{miss}$ distributions for the CRs of the AH selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the AH $2\mu$ Z CR

    Figure_003-f

    10.17182/hepdata.88882.v1/t11

    Background-only post-fit $p_{T}^{miss}$ distributions for the CRs of the AH selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the SL $1e$ 0 forward jets SR

    Figure_004-a

    10.17182/hepdata.88882.v1/t12

    Background-only post-fit $p_{T}^{miss}$ distributions for the SRs of the SL selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the SL $1\mu$ 0 forward jets SR

    Figure_004-b

    10.17182/hepdata.88882.v1/t13

    Background-only post-fit $p_{T}^{miss}$ distributions for the SRs of the SL selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the SL $1\mu$ 1 forward jet SR

    Figure_004-c

    10.17182/hepdata.88882.v1/t14

    Background-only post-fit $p_{T}^{miss}$ distributions for the SRs of the SL selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the SL $1e$ 1 forward jet SR

    Figure_004-d

    10.17182/hepdata.88882.v1/t15

    Background-only post-fit $p_{T}^{miss}$ distributions for the SRs of the SL selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the SL $1e$ 2 b tag SR

    Figure_004-e

    10.17182/hepdata.88882.v1/t16

    Background-only post-fit $p_{T}^{miss}$ distributions for the SRs of the SL selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the SL $1\mu$ 2 b tag SR

    Figure_004-f

    10.17182/hepdata.88882.v1/t17

    Background-only post-fit $p_{T}^{miss}$ distributions for the SRs of the SL selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the AH 0 forward jets SR

    Figure_005-a

    10.17182/hepdata.88882.v1/t18

    Background-only post-fit $p_{T}^{miss}$ distributions for the SRs of the AH selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the AH 1 forward jet SR

    Figure_005-b

    10.17182/hepdata.88882.v1/t19

    Background-only post-fit $p_{T}^{miss}$ distributions for the SRs of the AH selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • $p_{T}^{miss}$ in the AH 2 b tag SR

    Figure_005-c

    10.17182/hepdata.88882.v1/t20

    Background-only post-fit $p_{T}^{miss}$ distributions for the SRs of the AH selection. The total theory signal (t/t+DM and tt+DM summed together)...

  • Limits scalar

    Figure_006-a

    10.17182/hepdata.88882.v1/t21

    The expected and observed 95% CL limits on the DM production cross sections, relative to the theory predictions, shown for...

  • Limits pseudoscalar

    Figure_006-b

    10.17182/hepdata.88882.v1/t22

    The expected and observed 95% CL limits on the DM production cross sections, relative to the theory predictions, shown for...

  • Cross sections, scalar mediator

    Additional material

    10.17182/hepdata.88882.v1/t23

    Cross sections of the t+DM and tt+DM processes, for different mediator and dark matter masses. The scalar hypothesis is considered....

  • Cross sections, pseudoscalar mediator

    Additional material

    10.17182/hepdata.88882.v1/t24

    Cross sections of the t+DM and tt+DM processes, for different mediator and dark matter masses. The pseudoscalar hypothesis is considered....

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