Abstract (data abstract)

CERN-LHC. A search for Higgs boson pair ($hh$) production in association with a vector boson ($W\; {\textrm or}\; Z$) is presented, using 139 $fb^{-1}$ of proton--proton collision data at $\sqrt{s}=13\,\text{TeV}$ recorded with the ATLAS detector at the Large Hadron Collider. The search is performed in final states in which the vector boson decays leptonically ($W\to\ell\nu,\, Z\to\ell\ell,\nu\nu$ with $\ell=e, \mu$) and the Higgs bosons each decay into a pair of $b$-quarks. It targets $Vhh$ signals from both non-resonant $hh$ production, present in the Standard Model (SM), and resonant $hh$ production, as predicted in some SM extensions. For the resonant search, upper limits on the production cross-sections are derived for two specific models: one is the production of a vector boson along with a neutral heavy scalar resonance $H$, in the mass range 260--1000 GeV, that decays into $hh$, and the other is the production of a heavier neutral pseudoscalar resonance $A$ that decays into a $Z$ boson and $H$ boson, where the $A$ boson mass is 360--800 GeV and the $H$ boson mass is 260--400 GeV. Constraints are also derived in the parameter space of two-Higgs-doublet models.

Table 1

Data from Auxiliary Figure 11a

10.17182/hepdata.131626.v2/t1

Acceptance times efficiency as a function of resonant mass for each event selection step in the search for a neutral...
Table 2

Data from Figure 3b

10.17182/hepdata.131626.v2/t2

Acceptance times efficiency as a function of resonant mass for each event selection step in the search for a neutral...
Table 3

Data from Auxiliary Figure 11b

10.17182/hepdata.131626.v2/t3

Acceptance times efficiency as a function of resonant mass for each event selection step in the search for a neutral...
Table 4

Data from Auxiliary Figure 12a

10.17182/hepdata.131626.v2/t4

Acceptance times efficiency as a function of pseudoscalar resonant mass for each event selection step in the search for a...
Table 5

Data from Auxiliary Figure 13a

10.17182/hepdata.131626.v2/t5

Acceptance times efficiency as a function of pseudoscalar resonant mass for each event selection step in the search for a...
Table 6

Data from Auxiliary Figure 14a

10.17182/hepdata.131626.v2/t6

Acceptance times efficiency as a function of pseudoscalar resonant mass for each event selection step in the search for a...
Table 7

Data from Figure 3a

10.17182/hepdata.131626.v2/t7

Acceptance times efficiency as a function of pseudoscalar resonant mass for each event selection step in the search for a...
Table 8

Data from Auxiliary Figure 13c

10.17182/hepdata.131626.v2/t8

Acceptance times efficiency as a function of pseudoscalar resonant mass for each event selection step in the search for a...
Table 9

Data from Auxiliary Figure 14c

10.17182/hepdata.131626.v2/t9

Acceptance times efficiency as a function of pseudoscalar resonant mass for each event selection step in the search for a...
Table 10

Data from Auxiliary Figure 12b

10.17182/hepdata.131626.v2/t10

Acceptance times efficiency as a function of pseudoscalar resonant mass for each event selection step in the search for a...
Table 11

Data from Auxiliary Figure 13b

10.17182/hepdata.131626.v2/t11

Acceptance times efficiency as a function of pseudoscalar resonant mass for each event selection step in the search for a...
Table 12

Data from Auxiliary Figure 14b

10.17182/hepdata.131626.v2/t12

Acceptance times efficiency as a function of pseudoscalar resonant mass for each event selection step in the search for a...
Table 13

Data from Auxiliary Figure 12c

10.17182/hepdata.131626.v2/t13

Acceptance times efficiency as a function of pseudoscalar resonant mass for each event selection step in the search for a...
Table 14

Data from Auxiliary Figure 13d

10.17182/hepdata.131626.v2/t14

Acceptance times efficiency as a function of pseudoscalar resonant mass for each event selection step in the search for a...
Table 15

Data from Auxiliary Figure 14d

10.17182/hepdata.131626.v2/t15

Acceptance times efficiency as a function of pseudoscalar resonant mass for each event selection step in the search for a...
Table 16

Data from Figure 9a

10.17182/hepdata.131626.v2/t16

Expected and observed 95% CL upper limits on the cross-section of resonant $H\to 4b$ production in association with a W...
Table 17

Data from Figure 9b

10.17182/hepdata.131626.v2/t17

Expected and observed 95% CL upper limits on the cross-section of resonant $H\to 4b$ production in association with a Z...
Table 18

Data from Figure 10a

10.17182/hepdata.131626.v2/t18

Expected 95% CL upper limits on the cross-section of a heavy narrow-width pseudoscalar resonance decaying to a Z boson and...
Table 19

Data from Figure 10b

10.17182/hepdata.131626.v2/t19

Observed 95% CL upper limits on the cross-section of a heavy narrow-width pseudoscalar resonance decaying to a Z boson and...
Table 20

Data from Figure 10c

10.17182/hepdata.131626.v2/t20

Expected 95% CL upper limits on the cross-section of a heavy large-width pseudoscalar resonance decaying to a Z boson and...
Table 21

Data from Figure 10d

10.17182/hepdata.131626.v2/t21

Observed 95% CL upper limits on the cross-section of a heavy large-width pseudoscalar resonance decaying to a Z boson and...
Table 22

Data from Figure 8b

10.17182/hepdata.131626.v2/t22

Data and post-fit signal and background from S+B fit for 315 GeV resonant $H\to 4b$ production in association with a...
Table 23

Data from Auxiliary Figure 7a

10.17182/hepdata.131626.v2/t23

Data and post-fit signal and background from S+B fit for 400 GeV resonant $H\to 4b$ production in association with a...
Table 24

Data from Auxiliary Figure 6a

10.17182/hepdata.131626.v2/t24

Data and post-fit signal and background from S+B fit for 550 GeV resonant $H\to 4b$ production in association with a...
Table 25

Data from Auxiliary Figure 7b

10.17182/hepdata.131626.v2/t25

Data and post-fit signal and background from S+B fit for 400 GeV resonant $H\to 4b$ production in association with a...
Table 26

Data from Auxiliary Figure 6b

10.17182/hepdata.131626.v2/t26

Data and post-fit signal and background from S+B fit for a 790 GeV narrow-width pseudoscalar resonance decaying to a Z...
Table 27

Data from Figure 8c

10.17182/hepdata.131626.v2/t27

Data and post-fit signal and background from S+B fit for a 420 GeV large-width pseudoscalar resonance decaying to a Z...
Table 28

Data from Auxiliary Figure 7c

10.17182/hepdata.131626.v2/t28

Data and post-fit signal and background from S+B fit for a 700 GeV large-width pseudoscalar resonance decaying to a Z...
Table 29

Data from Figure 8a

10.17182/hepdata.131626.v2/t29

Data and post-fit signal and background from S+B fit for SM VHH production, with each Higgs boson decaying to $2b$.

Table 1

Table 2

Table 3

Table 4

Table 5

Table 6

Table 7

Table 8

Table 9

Table 10

Table 11

Table 12

Table 13

Table 14

Table 15

Table 16

Table 17

Table 18

Table 19

Table 20

Table 21

Table 22

Table 23

Table 24

Table 25

Table 26

Table 27

Table 28

Table 29

JSON

YAML

YODA

ROOT

CSV

Visualize

Ask a Question