Search for heavy resonances decaying into a $Z$ or $W$ boson and a Higgs boson in final states with leptons and $b$-jets in $139~$fb$^{-1}$ of $pp$ collisions at $\sqrt{s}=13~$TeV with the ATLAS detector

The ATLAS collaboration
CERN-EP-2022-115, 2022.

Abstract (data abstract)
This article presents a search for new resonances decaying into a $Z$ or $W$ boson and a $125$ GeV Higgs boson $h$, and it targets the $\nu\bar{\nu}b\bar{b}$, $\ell^+\ell^-b\bar{b}$, or $\ell^{\pm}{\nu}b\bar{b}$ final states, where $\ell=e$ or $\mu$, in proton--proton collisions at $\sqrt{s}=$13 TeV. The data used correspond to a total integrated luminosity of $139 fb^{-1}$ collected by the ATLAS detector during Run 2 of the LHC at CERN. The search is conducted by examining the reconstructed invariant or transverse mass distributions of $Z$h or $Wh$ candidates for evidence of a localised excess in the mass range from $220$ GeV to 5 TeV. No significant excess is observed and $95$ % confidence-level upper limits between 1.3 pb, and 0.3 fb are placed on the production cross section times branching fraction of neutral and charged spin-1 resonances and CP-odd scalar bosons. These limits are converted into constraints on the parameter space of the Heavy Vector Triplet model and the two-Higgs-doublet model.

  • Table 1

    data from Figure 2a

    10.17182/hepdata.111122.v2/t1

    Acceptance * reconstruction efficiency for the P P --> Zprime --> Zh --> vvbb/cc signals in the 0-lepton channel.

  • Table 2

    data from Figure 2b

    10.17182/hepdata.111122.v2/t2

    Acceptance * reconstruction efficiency for the P P --> Zprime --> Zh --> llbb/cc signals in the 2-lepton channel.

  • Table 3

    data from Figure 2c

    10.17182/hepdata.111122.v2/t3

    Acceptance * reconstruction efficiency for the P P --> bbA --> Zh --> vvbb signals in the 0-lepton channel.

  • Table 4

    data from Figure 2d

    10.17182/hepdata.111122.v2/t4

    Acceptance * reconstruction efficiency for the P P --> bbA --> Zh --> llbb signals in the 2-lepton channel.

  • Table 5

    data from Figure 2e

    10.17182/hepdata.111122.v2/t5

    Acceptance * reconstruction efficiency for the P P --> Wprime --> Zh --> lvbb/cc signals in the 0-lepton channel.

  • Table 6

    data from Figure 2f

    10.17182/hepdata.111122.v2/t6

    Acceptance * reconstruction efficiency for the P P --> Wprime --> Zh --> lvbb/cc signals in the 1-lepton channel.

  • Table 7

    data from figure 3a

    10.17182/hepdata.111122.v2/t7

    Event distributions of $m_{T,Vh}$ for the 0-lepton channel in the resolved 1 b-tag signal region. The background prediction is shown...

  • Table 8

    data from figure 3b

    10.17182/hepdata.111122.v2/t8

    Event distributions of $m_{T,Vh}$ for the 0-lepton channel in the resolved 2 b-tag signal region. The background prediction is shown...

  • Table 9

    data from figure 3c

    10.17182/hepdata.111122.v2/t9

    Event distributions of $m_{Vh}$ for the 2-lepton channel in the resolved 1 b-tag signal region. The background prediction is shown...

  • Table 10

    data from figure 3d

    10.17182/hepdata.111122.v2/t10

    Event distributions of $m_{Vh}$ for the 2-lepton channel in the resolved 2 b-tag signal region. The background prediction is shown...

  • Table 11

    data from figure 4a

    10.17182/hepdata.111122.v2/t11

    Event distributions of $m_{T,Vh}$ for the 0-lepton channel in the merged 1 b-tag signal region. The background prediction is shown...

  • Table 12

    data from figure 4b

    10.17182/hepdata.111122.v2/t12

    Event distributions of $m_{T,Vh}$ for the 0-lepton channel in the merged 2 b-tag signal region. The background prediction is shown...

  • Table 13

    data from figure 4c

    10.17182/hepdata.111122.v2/t13

    Event distributions of $m_{Vh}$ for the 2-lepton channel in the merged 1 b-tag signal region. The background prediction is shown...

  • Table 15

    data from figure 4d

    10.17182/hepdata.111122.v2/t14

    Event distributions of $m_{Vh}$ for the 2-lepton channel in the merged 2 b-tag signal region. The background prediction is shown...

  • Table 16

    data from figure 5a

    10.17182/hepdata.111122.v2/t15

    Event distributions of $m_{T,Vh}$ for the 1-lepton channel in the resolved 1 b-tag signal region. The background prediction is shown...

  • Table 17

    data from figure 5b

    10.17182/hepdata.111122.v2/t16

    Event distributions of $m_{T,Vh}$ for the 1-lepton channel in the resolved 2 b-tag signal region. The background prediction is shown...

  • Table 18

    data from figure 5c

    10.17182/hepdata.111122.v2/t17

    Event distributions of $m_{T,Vh}$ for the 1-lepton channel in the merged 1 b-tag signal region. The background prediction is shown...

  • Table 19

    data from figure 5d

    10.17182/hepdata.111122.v2/t18

    Event distributions of $m_{T,Vh}$ for the 1-lepton channel in the merged 2 b-tag signal region. The background prediction is shown...

  • Table 20

    data from figure 6a

    10.17182/hepdata.111122.v2/t19

    Event distributions of $m_{T,Vh}$ for the 0-lepton channel in the resolved 3+ b-tag signal region. The background prediction is shown...

  • Table 21

    data from figure 6b

    10.17182/hepdata.111122.v2/t20

    Event distributions of $m_{Vh}$ for the 2-lepton channel in the resolved 3+ b-tag signal region. The background prediction is shown...

  • Table 22

    data from figure 6c

    10.17182/hepdata.111122.v2/t21

    Event distributions of $m_{T,Vh}$ for the 0-lepton channel in the merged 2 b-tag signal region with additional b-tagged track jets...

  • Table 23

    data from figure 6d

    10.17182/hepdata.111122.v2/t22

    Event distributions of $m_{Vh}$ for the 2-lepton channel in the merged 1+2 b-tag signal region with additional b-tagged track jets...

  • Table 24

    data from figure 7a

    10.17182/hepdata.111122.v2/t23

    Event distributions of $m_{T,Vh}$ for the 0-lepton channel in the resolved 1 b-tag sideband control region. The background prediction is...

  • Table 25

    data from figure 7a

    10.17182/hepdata.111122.v2/t24

    Event distributions of $m_{T,Vh}$ for the 0-lepton channel in the resolved 2 b-tag sideband control region. The background prediction is...

  • Table 26

    data from figure 7a

    10.17182/hepdata.111122.v2/t25

    Event distributions of $m_{T,Vh}$ for the 1-lepton channel in the resolved 1 b-tag sideband control region. The background prediction is...

  • Table 27

    data from figure 7a

    10.17182/hepdata.111122.v2/t26

    Event distributions of $m_{T,Vh}$ for the 1-lepton channel in the resolved 2 b-tag sideband control region. The background prediction is...

  • Table 28

    data from figure 7b

    10.17182/hepdata.111122.v2/t27

    Event distributions of $m_{T,Vh}$ for the 0-lepton channel in the merged 1 b-tag sideband control region. The background prediction is...

  • Table 29

    data from figure 7b

    10.17182/hepdata.111122.v2/t28

    Event distributions of $m_{T,Vh}$ for the 0-lepton channel in the merged 2 b-tag sideband control region. The background prediction is...

  • Table 30

    data from figure 7b

    10.17182/hepdata.111122.v2/t29

    Event distributions of $m_{T,Vh}$ for the 1-lepton channel in the merged 1 b-tag sideband control region. The background prediction is...

  • Table 31

    data from figure 7b

    10.17182/hepdata.111122.v2/t30

    Event distributions of $m_{T,Vh}$ for the 1-lepton channel in the merged 2 b-tag sideband control region. The background prediction is...

  • Table 32

    data from figure 7c

    10.17182/hepdata.111122.v2/t31

    Event distributions of $m_{T,Vh}$ for the 0-lepton channel in the resolved 1 b-tag sideband control region. The background prediction is...

  • Table 33

    data from figure 7c

    10.17182/hepdata.111122.v2/t32

    Event distributions of $m_{T,Vh}$ for the 0-lepton channel in the resolved 2 b-tag sideband control region. The background prediction is...

  • Table 34

    data from figure 7c

    10.17182/hepdata.111122.v2/t33

    Event distributions of $m_{Vh}$ for the 2-lepton channel in the resolved top control region. The background prediction is shown after...

  • Table 35

    data from figure 7c

    10.17182/hepdata.111122.v2/t34

    Event distributions of $m_{T,Vh}$ for the 0-lepton channel in the merged 1 b-tag sideband control region. The background prediction is...

  • Table 36

    data from figure 7c

    10.17182/hepdata.111122.v2/t35

    Event distributions of $m_{T,Vh}$ for the 0-lepton channel in the merged 2 b-tag sideband control region. The background prediction is...

  • Table 37

    data from figure 8a

    10.17182/hepdata.111122.v2/t36

    Upper limits on Zprime to Z h production cross section times branching fraction in pb.

  • Table 38

    data from figure 8b

    10.17182/hepdata.111122.v2/t37

    Upper limits on Wprime to W h production cross section times branching fraction in pb.

  • Table 39

    data from figure 9a

    10.17182/hepdata.111122.v2/t38

    Upper limits on ggA to Z h production cross section times branching fraction in pb.

  • Table 40

    data from figure 9c

    10.17182/hepdata.111122.v2/t39

    Upper limits on bbA to Z h production cross section times branching fraction in pb.

  • Table 41

    data from figure 11

    10.17182/hepdata.111122.v2/t40

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 42

    data from figure 11

    10.17182/hepdata.111122.v2/t41

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 43

    data from figure 11

    10.17182/hepdata.111122.v2/t42

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 44

    data from figure 11

    10.17182/hepdata.111122.v2/t43

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 45

    data from figure 11

    10.17182/hepdata.111122.v2/t44

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 46

    data from figure 11

    10.17182/hepdata.111122.v2/t45

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 47

    data from figure 11

    10.17182/hepdata.111122.v2/t46

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 48

    data from figure 11

    10.17182/hepdata.111122.v2/t47

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 49

    data from figure 11

    10.17182/hepdata.111122.v2/t48

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 50

    data from figure 11

    10.17182/hepdata.111122.v2/t49

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 51

    data from figure 11

    10.17182/hepdata.111122.v2/t50

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 52

    data from figure 11

    10.17182/hepdata.111122.v2/t51

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 53

    data from figure 11

    10.17182/hepdata.111122.v2/t52

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 54

    data from figure 11

    10.17182/hepdata.111122.v2/t53

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 55

    data from figure 11

    10.17182/hepdata.111122.v2/t54

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 56

    data from figure 11

    10.17182/hepdata.111122.v2/t55

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 57

    data from figure 11

    10.17182/hepdata.111122.v2/t56

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 58

    data from figure 11

    10.17182/hepdata.111122.v2/t57

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 59

    data from figure 11

    10.17182/hepdata.111122.v2/t58

    Expected and observed two-dimensional likelihood scans of the b-associated production cross section times branching fraction vs the gluon-fusion production cross...

  • Table 60

    data from Figure 14a

    10.17182/hepdata.111122.v2/t59

    Acceptance * reconstruction efficiency for the P P --> A --> Zh --> vvbb signal in the 0-lepton channel.

  • Table 61

    data from Figure 14b

    10.17182/hepdata.111122.v2/t60

    Acceptance * reconstruction efficiency for the P P --> A --> Zh --> llbb signal in the 2-lepton channel.

  • Table 62

    data from figure 16a

    10.17182/hepdata.111122.v2/t61

    Event distributions of $m_{T,Vh}$ for the 0-lepton channel in the resolved 1 b-tag signal region. The background prediction is shown...

  • Table 63

    data from figure 16b

    10.17182/hepdata.111122.v2/t62

    Event distributions of $m_{T,Vh}$ for the 0-lepton channel in the resolved 2 b-tag signal region. The background prediction is shown...

  • Table 64

    data from figure 16c

    10.17182/hepdata.111122.v2/t63

    Event distributions of $m_{T,Vh}$ for the 0-lepton channel in the merged 1 b-tag signal region. The background prediction is shown...

  • Table 65

    data from figure 16d

    10.17182/hepdata.111122.v2/t64

    Event distributions of $m_{T,Vh}$ for the 0-lepton channel in the merged 2 b-tag signal region. The background prediction is shown...

  • Table 66

    data from figure 19a

    10.17182/hepdata.111122.v2/t65

    Distributions of expected upper limits at 95% confidence level on the cross section of P P --> A --> Zh...

  • Table 67

    data from figure 19b

    10.17182/hepdata.111122.v2/t66

    Distributions of observed upper limits at 95% confidence level on the cross section of P P --> A --> Zh...

Version 2 modifications: Minor revisions to ensure consistency to the figures and captions from the journal publication.

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