Measurement of Higgs boson decay into $b$-quarks in associated production with a top-quark pair in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

The collaboration
JHEP 06 (2022) 097, 2022.

Abstract (data abstract)
The associated production of a Higgs boson and a top-quark pair is measured in events characterised by the presence of one or two electrons or muons. The Higgs boson decay into a $b$-quark pair is used. The analysed data, corresponding to an integrated luminosity of 139 fb$^{-1}$, were collected in proton--proton collisions at the Large Hadron Collider between 2015 and 2018 at a centre-of-mass energy of $\sqrt{s}=13$ TeV. The measured signal strength, defined as the ratio of the measured signal yield to that predicted by the Standard Model, is $0.35^{+0.36}_{-0.34}$. This result is compatible with the Standard Model prediction and corresponds to an observed (expected) significance of 1.0 (2.7) standard deviations. The signal strength is also measured differentially in bins of the Higgs boson transverse momentum in the simplified template cross-section framework, including a bin for specially selected boosted Higgs bosons with transverse momentum above 300 GeV.

• Figure 2a

Data from Figure 2a

10.17182/hepdata.114360.v2/t1

Comparison between data and prediction for the DNN $P(H)$ output for the Higgs boson candidate prior to any fit to...

• Figure 2b

Data from Figure 2b

10.17182/hepdata.114360.v2/t2

Comparison between data and prediction for the DNN $P(H)$ output for the Higgs boson candidate prior to any fit to...

• Figure 3

Data from Figure 3

10.17182/hepdata.114360.v2/t3

Performance of the Higgs boson reconstruction algorithms. For each row of truth' ${\hat{p}_{{T}}^{H}}$, the matrix shows (in percentages) the fraction...

• Figure 4a

Data from Figure 4a

10.17182/hepdata.114360.v2/t4

Pre-fit distribution of the reconstructed Higgs boson candidate $p_T^H$ for the dilepton $SR^{\geq 4j}_{\geq 4b}$ signal region. The dashed line...

• Figure 4b

Data from Figure 4b

10.17182/hepdata.114360.v2/t5

Pre-fit distribution of the reconstructed Higgs boson candidate $p_T^H$ for the single-lepton resolved $SR^{\geq 6j}_{\geq 4b}$ signal region. The dashed...

• Figure 4c

Data from Figure 4c

10.17182/hepdata.114360.v2/t6

Pre-fit distribution of the reconstructed Higgs boson candidate $p_T^H$ for the single-lepton boosted ${{SR}_{{boosted}}}$ signal region. The dashed line shows...

• Figure 5a

Data from Figure 5a

10.17182/hepdata.114360.v2/t7

Comparison of predicted and observed event yields in each of the control and signal regions in the dilepton channel after...

• Figure 5b

Data from Figure 5b

10.17182/hepdata.114360.v2/t8

Comparison of predicted and observed event yields in each of the control and signal regions in the single-lepton channels after...

• Figure 6a

Data from Figure 6a

10.17182/hepdata.114360.v2/t9

Comparison between data and prediction for the BDT discriminant in the dilepton SRs after the inclusive fit to the data...

• Figure 6b

Data from Figure 6b

10.17182/hepdata.114360.v2/t10

Comparison between data and prediction for the BDT discriminant in the dilepton SRs after the inclusive fit to the data...

• Figure 6c

Data from Figure 6c

10.17182/hepdata.114360.v2/t11

Comparison between data and prediction for the BDT discriminant in the dilepton SRs after the inclusive fit to the data...

• Figure 6d

Data from Figure 6d

10.17182/hepdata.114360.v2/t12

Comparison between data and prediction for the BDT discriminant in the dilepton SRs after the inclusive fit to the data...

• Figure 7a

Data from Figure 7a

10.17182/hepdata.114360.v2/t13

Comparison between data and prediction for the BDT discriminant in the single-lepton resolved SRs after the inclusive fit to the...

• Figure 7b

Data from Figure 7b

10.17182/hepdata.114360.v2/t14

Comparison between data and prediction for the BDT discriminant in the single-lepton resolved SRs after the inclusive fit to the...

• Figure 7c

Data from Figure 7c

10.17182/hepdata.114360.v2/t15

Comparison between data and prediction for the BDT discriminant in the single-lepton resolved SRs after the inclusive fit to the...

• Figure 7d

Data from Figure 7d

10.17182/hepdata.114360.v2/t16

Comparison between data and prediction for the BDT discriminant in the single-lepton resolved SRs after the inclusive fit to the...

• Figure 7e

Data from Figure 7e

10.17182/hepdata.114360.v2/t17

Comparison between data and prediction for the BDT discriminant in the single-lepton resolved SRs after the inclusive fit to the...

• Figure 7f

Data from Figure 7f

10.17182/hepdata.114360.v2/t18

Comparison between data and prediction for the BDT discriminant in the single-lepton boosted SRs after the inclusive fit to the...

• Figure 7g

Data from Figure 7g

10.17182/hepdata.114360.v2/t19

Comparison between data and prediction for the BDT discriminant in the single-lepton boosted SRs after the inclusive fit to the...

• Figure 8a

Data from Figure 8a

10.17182/hepdata.114360.v2/t20

Comparison between data and prediction for ${\Delta R^{{avg}}_{bb}}$ after the inclusive fit to the data in the single-lepton $CR^{5j}_{{\geq}4b\ lo}$...

• Figure 8b

Data from Figure 8b

10.17182/hepdata.114360.v2/t21

Comparison between data and prediction for ${\Delta R^{{avg}}_{bb}}$ after the inclusive fit to the data in the single-lepton $CR^{5j}_{{\geq}4b\ hi}$...

• Figure 9

Data from Figure 9

10.17182/hepdata.114360.v2/t22

Post-fit yields of signal ($S$) and total background ($B$) as a function of $\log (S/B)$, compared with data. Final-discriminant bins...

• Figure 10a

Data from Figure 10a

10.17182/hepdata.114360.v2/t23

Comparison between data and prediction for the reconstruction BDT score for the Higgs boson candidate identified using Higgs boson information,...

• Figure 10b

Data from Figure 10b

10.17182/hepdata.114360.v2/t24

Comparison between data and prediction for the average $\Delta \eta$ between $b$-tagged jets, after the inclusive fit to the...

• Figure 11a

Data from Figure 11a

10.17182/hepdata.114360.v2/t25

Comparison between data and prediction for the likelihood discriminant, after the inclusive fit to the data in the single-lepton resolved...

• Figure 11b

Data from Figure 11b

10.17182/hepdata.114360.v2/t26

Comparison between data and prediction for the average $\Delta R$ for all possible combinations of $b$-tagged jet pairs, after the...

• Figure 12a

Data from Figure 12a

10.17182/hepdata.114360.v2/t27

Comparison between data and prediction for the DNN $P(H)$ output for the Higgs boson candidate after the inclusive fit to...

• Figure 12b

Data from Figure 12b

10.17182/hepdata.114360.v2/t28

Comparison between data and prediction for the DNN $P(H)$ output for the Higgs boson candidate after the inclusive fit to...

• Figure 13a

Data from Figure 13a

10.17182/hepdata.114360.v2/t29

Post-fit distribution of the reconstructed Higgs boson candidate mass for the dilepton $SR^{\geq 4j}_{\geq 4b}$ signal region. The ${t\bar {t}H}$...

• Figure 13b

Data from Figure 13b

10.17182/hepdata.114360.v2/t30

• Figure 17c

Data from Figure 17c

10.17182/hepdata.114360.v2/t42

Post-fit distribution of the reconstructed Higgs boson candidate $p_T^H$ for the single-lepton boosted ${{SR}_{{boosted}}}$ signal region. The ${t\bar {t}H}$ signal...

• Figure 18

Data from Figure 18

10.17182/hepdata.114360.v2/t43

Signal-strength measurements in the individual STXS ${\hat{p}_{{T}}^{H}}$ bins, as well as the inclusive signal strength.

• Figure 19

Data from Figure 19

10.17182/hepdata.114360.v2/t44

95% CL simplified template cross-section upper limits in the individual STXS ${\hat{p}_{{T}}^{H}}$ bins, as well as the inclusive limit. The...

• Figure 22

Data from Figure 22

10.17182/hepdata.114360.v2/t45

The ratios $S/B$ (black solid line, referring to the vertical axis on the left) and $S/\sqrt{B}$ (red dashed line, referring...

• Figure 23a

Data from Figure 23a

10.17182/hepdata.114360.v2/t46

Comparison between data and prediction for the $\Delta R$ between the Higgs candidate and the ${t\bar {t}}$ candidate system, after...

• Figure 23b

Data from Figure 23b

10.17182/hepdata.114360.v2/t47

Comparison between data and prediction for the number of $b$-tagged jet pairs with an invariant mass within 30 GeV of...

• Figure 24a

Data from Figure 24a

10.17182/hepdata.114360.v2/t48

Comparison between data and prediction for the reconstruction BDT score for the Higgs boson candidate identified using Higgs boson information,...

• Figure 24b

Data from Figure 24b

10.17182/hepdata.114360.v2/t49

Comparison between data and prediction for the $\Delta R$ between the two highest ${p_{{T}}}$ $b$-tagged jets, after the inclusive fit...

• Figure 25a

Data from Figure 25a

10.17182/hepdata.114360.v2/t50

Comparison between data and prediction for the sum of $b$-tagging discriminants of jets from Higgs, hadronic top and leptonic top...

• Figure 25b

Data from Figure 25b

10.17182/hepdata.114360.v2/t51

Comparison between data and prediction for the sum of $b$-tagging discriminants of jets from Higgs, hadronic top and leptonic top...

• Figure 25c

Data from Figure 25c

10.17182/hepdata.114360.v2/t52

Comparison between data and prediction for the hadronic top candidate invariant mass, after the inclusive fit to the data in...

• Figure 25d

Data from Figure 25d

10.17182/hepdata.114360.v2/t53

Comparison between data and prediction for the hadronic top candidate invariant mass, after the inclusive fit to the data in...

• Figure 25e

Data from Figure 25e

10.17182/hepdata.114360.v2/t54

Comparison between data and prediction for the fraction of the sum of $b$-tagging discriminants of all jets not associated to...

• Figure 25f

Data from Figure 25f

10.17182/hepdata.114360.v2/t55

Comparison between data and prediction for the fraction of the sum of $b$-tagging discriminants of all jets not associated to...

• Figure 26a

Data from Figure 26a

10.17182/hepdata.114360.v2/t56

• Figure 26c

Data from Figure 26c

10.17182/hepdata.114360.v2/t58

• Figure 26e

Data from Figure 26e

10.17182/hepdata.114360.v2/t60

• Table 16

Data from Table 16

10.17182/hepdata.114360.v2/t73

Number of expected signal events before the fit, after each selection requirement applied to enter the single-lepton channel resolved $SR^{\geq... • Table 17 Data from Table 17 10.17182/hepdata.114360.v2/t74 Number of expected signal events before the fit, after each selection requirement applied to enter the single-lepton channel boosted$SR_{boosted}\$...

Version 2 modifications: Updates to number labelling of tables to match that of the final paper (tables were moved due to changes introduced following peer-review)