Measurements of Higgs boson properties in the diphoton decay channel with $36\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of $pp$ collision data at $\sqrt{s}=13\text{ }\text{ }\mathrm{TeV}$ with the ATLAS detector

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Measurements of Higgs boson properties in the diphoton decay channel with $36 {fb}^{- 1}$ of $p p$ collision data at $\sqrt{s} = 13 TeV$ with the ATLAS detector

M. Aaboud et al. (ATLAS Collaboration)

Phys. Rev. D 98, 052005 – Published 18 September 2018

Abstract

Properties of the Higgs boson are measured in the two-photon final state using $36.1 {fb}^{- 1}$ of proton–proton collision data recorded at $\sqrt{s} = 13 TeV$ by the ATLAS experiment at the Large Hadron Collider. Cross-section measurements for the production of a Higgs boson through gluon–gluon fusion, vector-boson fusion, and in association with a vector boson or a top-quark pair are reported. The signal strength, defined as the ratio of the observed to the expected signal yield, is measured for each of these production processes as well as inclusively. The global signal strength measurement of $0.99 \pm 0.14$ improves on the precision of the ATLAS measurement at $\sqrt{s} = 7$ and 8 TeV by a factor of two. Measurements of gluon–gluon fusion and vector-boson fusion productions yield signal strengths compatible with the Standard Model prediction. Measurements of simplified template cross sections, designed to quantify the different Higgs boson production processes in specific regions of phase space, are reported. The cross section for the production of the Higgs boson decaying to two isolated photons in a fiducial region closely matching the experimental selection of the photons is measured to be $55 \pm 10 fb$ , which is in good agreement with the Standard Model prediction of $64 \pm 2 fb$ . Furthermore, cross sections in fiducial regions enriched in Higgs boson production in vector-boson fusion or in association with large missing transverse momentum, leptons or top-quark pairs are reported. Differential and double-differential measurements are performed for several variables related to the diphoton kinematics as well as the kinematics and multiplicity of the jets produced in association with a Higgs boson. These differential cross sections are sensitive to higher order QCD corrections and properties of the Higgs boson, such as its spin and $C P$ quantum numbers. No significant deviations from a wide array of Standard Model predictions are observed. Finally, the strength and tensor structure of the Higgs boson interactions are investigated using an effective Lagrangian, which introduces additional $C P$ -even and $C P$ -odd interactions. No significant new physics contributions are observed.

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Received 14 February 2018

DOI:https://doi.org/10.1103/PhysRevD.98.052005

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

Physics Subject Headings (PhySH)

Higgs bosons Photons

Particle properties

Particle data analysis

Particles & Fields

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Vol. 98, Iss. 5 — 1 September 2018

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Figure 1
Efficiency for both photons to fulfill the isolation requirement as a function of the number of primary vertex candidates in each event, determined with a sample of simulated Higgs bosons with $m_{H} = 125 GeV$ , produced in gluon–gluon fusion and decaying into two photons. Events are required to satisfy the kinematic selection described in Sec. 5b for the 8 TeV (violet squares) and 13 TeV (blue circles) simulated sample. The error bars show the statistical uncertainty of the generated samples. The Run 2 (Run 1) isolation requirement is based on the transverse energy deposited in the calorimeter in a $Δ R = 0.2$ ( $Δ R = 0.4$ ) cone around the photon candidates. Both the Run 1 and Run 2 algorithms also use tracking information in a $Δ R = 0.2$ cone around the photon candidates.
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Figure 2
The diphoton mass signal shapes of two gluon–gluon fusion categories that are later introduced in Sec. 8a are shown: ggH 0J Fwd aims to select gluon–gluon fusion events with no additional jet and at least one photon in the pseudorapidity region $| η | > 0.95$ ; ggH 0J Cen applies a similar selection, but requires both photons to have $| η | \leq 0.95$ in order to have a better energy resolution. The simulated sample (labeled as MC) is compared to the fit model and contains simulated events from all Higgs boson production processes described in Sec. 4 with $m_{H} = 125 GeV$ .
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Figure 3
The data-driven determination of (a) event yields and (b) event fractions for $γ γ$ , $γ j$ , and $j j$ events as a function of $m_{γ γ}$ after the final selection outlined in Sec. 5. The event fractions for two differential observables, (c) $p_{T}^{γ γ}$ and (d) $N_{jet}$ defined for jets with a $p_{T} > 30 GeV$ are shown as well. The shaded regions show the total uncertainty of the measured yield and fraction, and the error bars show the statistical uncertainties.
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Figure 4
The normalized distributions for the expected background of two kinematic variables used for the selection of the hadronic $t \bar{t} H$ categories: (a) $H_{T}$ and (b) $m_{all jets}$ for events after the first step of the selection (see text) for simulated $H \to γ γ$ events produced via $t \bar{t} H$ (blue) and gluon–gluon fusion (red), for the expected background derived from the data control region (green) described in the text and events from data with $105 GeV < m_{γ γ} < 120 GeV$ or $130 GeV < m_{γ γ} < 160 GeV$ (black dots with error bars showing the statistical uncertainty).
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Figure 5
The normalized distributions of two kinematic variables used for the selection of the $V H$ hadronic categories: (a) $m_{j j}$ and (b) $p_{Tt}^{γ γ}$ for events after the first step of the $V H$ hadronic category preselection (see text) for simulated $H \to γ γ$ events produced in association with hadronically decaying vector bosons (blue) or through ggH, VBF or $t \bar{t} H$ processes (red), for the expected background from data ( $γ j$ , $j j$ ) and simulation ( $γ γ$ , $V γ γ$ ) control samples (green, purple), and for events from data with $105 GeV < m_{γ γ} < 120 GeV$ or $130 GeV < m_{γ γ} < 160 GeV$ (black dots with error bars showing the statistical uncertainty).
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Figure 6
The normalized distributions for the expected background of two kinematic variables used for the selection of the VBF categories: (a) $| Δ η_{j j} |$ and (b) $| Δ ϕ_{γ γ, j j} |$ for events after the first step of the selection (see text) for simulated $H \to γ γ$ events produced via vector-boson fusion (blue) and gluon–gluon fusion (red), for the expected background from data ( $γ j$ , $j j$ ) and simulation ( $γ γ$ ) control samples (green), and for events from data with $105 GeV < m_{γ γ} < 120 GeV$ or $130 GeV < m_{γ γ} < 160 GeV$ (black dots with error bars showing the statistical uncertainty).
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Figure 7
The fraction of signal events assigned to each reconstructed category ( $x$ axis and listed in Table 4) and originating from a given region (listed in Table 1) of the stage-1 simplified template cross section framework ( $y$ axis). The black lines separate the $t \bar{t} H$ and $t H$ , $V H$ leptonic, $V H$ hadronic and VBF enriched, and untagged categories, along with the simplified template cross-section regions they are most sensitive to. The color shows the purity of the region per category.
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Figure 8
The expected composition of the selected Higgs boson events, in terms of the different production modes, for each reconstructed category.
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Figure 9
Weighted diphoton invariant mass spectrum observed in the 2015 and 2016 data at 13 TeV. Each event is weighted by the $\ln (1 + S_{90} / B_{90})$ ratio of the expected signal ( $S_{90}$ ) and background ( $B_{90}$ ) of the 90% signal quantile in the category to which it belongs to. The values of $S_{90}$ and $B_{90}$ used for each category are shown in Table 27 of Appendix pp5. The error bars represent 68% confidence intervals of the weighted sums. The solid red curve shows the fitted signal-plus-background model when the Higgs boson mass is constrained to be $125.09 \pm 0.24 GeV$ . The background component of the fit is shown with the dotted blue curve. The signal component of the fit is shown with the solid black curve. Both the signal-plus-background and background-only curves reported here are obtained from the sum of the individual curves in each category weighted by the logarithm of unity plus the signal-to-background ratio. The bottom plot shows the residuals between the data and the background component of the fitted model.
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Figure 10
Weighted diphoton invariant mass spectra observed in the 13 TeV data for events belonging to: (a) “untagged” categories and the “jet BSM” category, in which the expected signal is produced mainly through gluon–gluon fusion, (b) VBF categories, (c) $V H$ categories and (d) $t \bar{t} H$ categories. Each event is weighted by the $\ln (1 + S_{90} / B_{90})$ ratio of the expected signal ( $S_{90}$ ) and background ( $B_{90}$ ) of the 90% signal quantile in the category it belongs to. The values of $S_{90}$ and $B_{90}$ used for each category are shown in Table 27 of Appendix pp5. The error bars represent 68% confidence intervals of the weighted sums. The solid red curve shows the fitted signal-plus-background model when the Higgs boson mass is constrained to be $125.09 \pm 0.24 GeV$ . The background component of the fit is shown with the dotted blue curve. The signal component of the fit is shown with the solid black curve. Both the signal-plus-background and background-only curves reported here are obtained from the sum of the individual curves in each category weighted by the logarithm of unity plus the signal-to-background ratio. The bottom plot shows the residuals between the data and the background component of the fitted model.
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Figure 11
Observed negative log-profile likelihood $Λ$ of the global signal strength $μ$ . The three likelihood contours shown correspond to all theory and experimental nuisance parameters fixed (Stat.), all experimental nuisance parameters fixed (Theo.), and with all nuisance parameters floating (Total). The intersections of the solid curves and horizontal lines at $Λ = 1$ and $Λ = 4$ indicate the 1 and $2 σ$ confidence intervals of the corresponding result.
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Figure 12
Summary of the signal strengths measured for the different production processes (ggH, VBF, $V H$ and top) and globally ( $μ_{Run - 2}$ ), compared to the global signal strength measured at 7 and 8 TeV ( $μ_{Run - 1}$ ) [76]. The black and orange error bars show the total and statistical uncertainties. The signal strength $μ_{Run - 1}$ was derived assuming the Higgs production-mode cross section based on Refs. [17, 111]. Uncertainties smaller than 0.05 are displayed as 0.0. In the more recent theoretical predictions used in this analysis [7, 32], the gluon–gluon fusion production-mode cross section is larger by approximately 10%. In this measurement, the $b \bar{b} H$ contributions are scaled with ggH ( $μ_{bbH} = μ_{ggH}$ ), and the $t H$ and $t \bar{t} H$ productions are measured together ( $μ_{top} = μ_{ttH + tH}$ ). Associated production with $Z$ or $W$ bosons is assumed to be scaled by a single signal strength parameter ( $μ_{VH} = μ_{ZH} = μ_{WH}$ ).
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Figure 13
Summary of asymptotic limits for the signal strengths of the associated production processes ( $V H$ and top).
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Figure 14
Summary plot of the measured production-mode cross sections times the Higgs to diphoton branching ratio. For illustration purposes the central values have been divided by their SM expectations but no additional theory uncertainties have been added to the uncertainty of the ratio. The uncertainties in the predicted SM cross sections are shown in gray bands in the plot. The fitted value of $σ_{top}$ corresponds to the sum of $t \bar{t} H$ , $t H q$ , and $t H W$ production-mode cross sections under the assumption that their relative ratios are as predicted by the SM. The $V H$ production mode cross-section values are determined under the assumption that the ratio of the $W H$ and $Z H$ production-mode cross sections is as predicted by the SM and includes production from both the quark and gluon initial states. The $b \bar{b} H$ contributions are merged with ggH.
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Figure 15
Likelihood contours in the ( $σ_{ggH} \times B (H \to γ γ)$ , $σ_{VBF} \times B (H \to γ γ)$ ) plane, compared to the Standard Model prediction (red cross) for a Higgs boson mass $m_{H} = 125.09 GeV$ .
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Figure 16
Summary plot of the measured simplified template cross sections times the Higgs to diphoton branching ratio. For illustration purposes the central values have been divided by their SM expectations but no additional theory uncertainties have been included in the uncertainty of the ratio due to this. The uncertainties in the predicted SM cross sections are shown in gray in the plot. The definition of the measured regions can be found in Table 1. The fitted value of $σ (top)$ corresponds to the sum of $t \bar{t} H$ and $t H$ production-mode cross sections under the assumption that their relative ratios are as predicted by the SM. The $σ (VH, leptonic)$ cross-section values are determined under the assumption that the ratio of the $W H$ and $Z H$ production mode cross sections is as predicted by the SM and includes production from both the quark and gluon initial states. The $b \bar{b} H$ contributions are merged with ggH.
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Figure 17
Observed correlations between the measured simplified template cross sections, including both the statistical and systematic uncertainties. The color indicates the size of the correlation.
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Figure 18
Likelihood contours in (a) the $(κ_{g}, κ_{γ})$ plane, and (b) the $(κ_{V}, κ_{F})$ plane, compared to the Standard Model prediction (red star) for a Higgs boson mass $m_{H} = 125.09 GeV$ . In (a), all coupling-strength modifiers other than $κ_{g}$ and $κ_{γ}$ are fixed to their SM value. In (b), the $g g \to H$ and $H \to γ γ$ loops are resolved in terms of two universal coupling-strength modifiers $κ_{F}$ and $κ_{V}$ , under the assumption that $κ_{V} = κ_{W} = κ_{Z}$ and $κ_{F} = κ_{t} = κ_{b} = κ_{τ} = κ_{μ}$ .
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Figure 19
The profile of negative log-likelihood $Λ$ of the observed and expected coupling-strength modifier ratio $λ_{t g} = κ_{t} / κ_{g}$ . The parameters $κ_{g γ}$ and $λ_{V g}$ are also profiled within the fit. The intersections of the solid and dashed curves with the horizontal dashed line at $Λ = 1$ and $Λ = 4$ indicate the 1 and $2 σ$ confidence intervals of the observed and expected results, respectively.
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Figure 20
The observed statistical correlations between $p_{T}^{γ γ}$ , $N_{jet}$ , $m_{j j}$ , $| Δ ϕ_{j j} |$ , and $p_{T}^{j_{1}}$ are shown. These correlations were determined from an ensemble of 100,000 bootstrapped data sets which are each reanalyzed using an unbinned maximum-likelihood fit of the diphoton invariant mass spectrum to extract the correlations.
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Figure 21
The expected composition of Higgs boson events in each fiducial region (a) after the reconstruction and (b) at particle-level. Details about the reconstruction can be found in Sec. 5 and the definition of the particle-level fiducial volume is given in Sec. 9a.
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Figure 22
Diphoton invariant mass $m_{γ γ}$ spectrum observed in the 2015 and 2016 data at $\sqrt{s} = 13 TeV$ for events in the diphoton fiducial region. The solid red curve shows the fitted signal-plus-background model when the Higgs boson mass is constrained to be $125.09 \pm 0.24 GeV$ . The background component of the fit is shown with the dotted blue curve. The signal component of the fit is shown with the solid black curve. The bottom plot shows the residuals between the data and the background component of the fitted model.
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Figure 23
Diphoton invariant mass $m_{γ γ}$ spectra observed in the 2015 and 2016 data at $\sqrt{s} = 13 TeV$ for events in the (a) VBF-enhanced, (b) $N_{lepton} \geq 1$ , (c) high $E_{T}^{miss}$ , and (d) $t \bar{t} H$ -enhanced fiducial regions. The solid red curve shows the fitted signal-plus-background model when the Higgs boson mass is constrained to be $125.09 \pm 0.24 GeV$ . The background component of the fit is shown with the dotted blue curve. The signal component of the fit is shown with the solid black curve. The bottom plot shows the residuals between the data and the background component of the fitted model.
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Figure 24
The measured cross sections or cross-section upper limits of the diphoton, VBF-enhanced, $N_{lepton} \geq 1$ , high $E_{T}^{miss}$ , and $t \bar{t} H$ -enhanced fiducial regions are shown. The intervals on the vertical axis each represent one of these fiducial regions. The data are shown as filled (black) circles. The error bar on each measured cross section represents the total uncertainty in the measurement, with the systematic uncertainty shown as a dark gray rectangle. Each cross section limit is shown at the 95% confidence level. The measured cross sections are compared to a range of predictions and a detailed description of each prediction can be found in the text. All comparisons include the SM predictions arising from VBF, $V H$ , $t \bar{t} H$ , and $b \bar{b} H$ , which are collectively labeled as $X H$ .
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Figure 25
Cross sections for $p p \to H \to γ γ$ as a function of inclusive and exclusive jet multiplicities for jets with (a) $p_{T} > 30 GeV$ and (b) $p_{T} > 50 GeV$ . The data are shown as filled (black) circles. The vertical error bar on each data point represents the total uncertainty in the measured cross section and the shaded (gray) band is the systematic component. The measured differential cross sections are compared to a range of predictions and details can be found in the text. The width of the bands of each prediction reflects the total theoretical uncertainty. The small contribution from VBF, $V H$ , $t \bar{t} H$ , and $b \bar{b} H$ is also shown as a (green) histogram and denoted by $X H$ .
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Figure 26
The differential cross sections for $p p \to H \to γ γ$ as a function of (a) $p_{T}^{γ γ}$ and (b) $| y_{γ γ} |$ are shown and compared to the SM expectations.
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Figure 27
The differential cross sections for $p p \to H \to γ γ$ as a function of (a) $p_{T}^{j_{1}}$ , (b) $| y_{j_{1}} |$ , (c) $p_{T}^{j_{2}}$ , and (d) $| y_{j_{2}} |$ are shown and compared to the SM expectations. The data and theoretical predictions are presented in the same way as in Fig. 26. In addition, the nnlojet and scetlib(stwz) predictions, the nnlojet prediction, and the Sherpa (Meps@Nlo) and GoSam predictions, described in the text, are displayed in (a), (b) and (c+d), respectively.
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Figure 28
The differential cross sections for $p p \to H \to γ γ$ as a function of (a) $| \cos θ^{*} |$ and (b) $Δ ϕ_{j j}$ are shown and compared to the SM expectations. The data and theoretical predictions are presented in the same way as in Fig. 26. In addition, the scetlib+mcfm8 prediction and the Sherpa (Meps@Nlo) and GoSam predictions, described in the text, are displayed in (a) and (b), respectively.
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Figure 29
The differential cross sections for $p p \to H \to γ γ$ as a function of (a) $| Δ y_{j j} |$ , (b) $π - | Δ ϕ_{γ γ, j j} |$ , and (c) $m_{j j}$ are shown and compared to the SM expectations. The data and theoretical predictions are presented in the same way as in Fig. 26. In addition, the Sherpa (Meps@Nlo) and GoSam predictions are shown for all three cross sections.
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Figure 30
The double-differential cross section for $p p \to H \to γ γ$ as a function of (a) $p_{T}^{γ γ}$ and $N_{jet}$ , for jets with $p_{T} > 30 GeV$ , and (b) $p_{T}^{γ γ}$ and $| \cos θ^{*} |$ separating the two regions of $| \cos θ^{*} | < 0.5$ and $| \cos θ^{*} | > 0.5$ from each other. The data and theoretical predictions are presented in the same way as in Fig. 26.
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Figure 31
The relative size of systematic uncertainties associated with the signal extraction, the correction factors (experimental and theoretical modeling) and the luminosity on the differential cross sections are shown as a function of (a) $p_{Tt}^{γ γ}$ and (b) $N_{jet}$ . The statistical uncertainty associated with the signal extraction is also shown as a gray band. For completeness, the relevant components of the uncertainties in the correction factors are shown as a function of (c) $p_{Tt}^{γ γ}$ and (d) $N_{jet}$ .
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Figure 32
(a) The ratio of the first moment (mean) of each differential distribution predicted by the Standard Model to that observed in the data. The SM moment is calculated by using the default MC distributions for gluon–gluon fusion and the other production mechanisms. (b) The ratio of the second moment (RMS) of each differential distribution predicted by the Standard Model to that observed in the data. The intervals on the vertical axes each represent one of the differential distributions. The band for the theoretical prediction represents the corresponding uncertainty in that prediction (see text for details). The error bar on the data represents the total uncertainty in the measurement, with the gray band representing only the systematic uncertainty.
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Figure 33
(a) The measured differential cross sections as a function of $p_{T}^{γ γ}$ , $N_{jet}$ , $m_{j j}$ , $| Δ ϕ_{j j} |$ , and $p_{T}^{j_{1}}$ are compared to the SM hypothesis and two non-SM hypotheses with ${\bar{c}}_{g} = 1 \times 10^{- 4}$ and ${\bar{c}}_{H W} = 0.05$ , respectively. (b) Ratios of differential cross sections, as predicted for specific choices of Wilson coefficient, to the differential cross sections predicted by the SM: the impact of non-zero ${\bar{c}}_{g}$ and ${\tilde{c}}_{g}$ is shown relative to the SM ggH prediction, while the impact of nonzero ${\bar{c}}_{H W}$ and ${\tilde{c}}_{H W}$ is shown relative to the SM $VBF + V H$ prediction.
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Figure 34
The observed 68% (dark) and 95% (light) confidence level regions from the simultaneous fit to the ${\bar{c}}_{H W}$ and ${\tilde{c}}_{H W}$ Wilson coefficients. The values of ${\bar{c}}_{H B}$ and ${\tilde{c}}_{H B}$ are set to be equal to ${\bar{c}}_{H W}$ and ${\tilde{c}}_{H W}$ , respectively, and all other Wilson coefficients are set to zero, except for ${\bar{c}}_{H B}$ and ${\tilde{c}}_{H B}$ which are set to be equal to ${\bar{c}}_{H W}$ and ${\tilde{c}}_{H W}$ , respectively. The SM expectation at (0,0) is also shown, together with the Run-1 confidence regions reported in Ref. [14].
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Figure 35
Summary plot of the measured simplified template cross sections times the Higgs to diphoton branching ratio, as defined in Table 20. For illustration purposes, the central values have been divided by their SM expectations but no additional SM uncertainties have been folded into the measurement. The uncertainties in the SM predicted cross sections are shown in gray in the plot. The fitted value of $σ (top)$ corresponds to the sum of the $t \bar{t} H$ , $t H q$ , and $t H W$ production-mode cross sections under the assumption that their relative ratios are as predicted by the SM. The $σ (VH, leptonic)$ cross-section values are determined under the assumption that the ratio of the $W H$ and $Z H$ production mode cross sections is as predicted by the SM and includes production from both the quark and gluon initial states. The $b \bar{b} H$ contributions are merged with ggH.
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Figure 36
The differential cross sections for $p p \to H \to γ γ$ as a function of (a) $p_{Tt}^{γ γ}$ and (b) $| Δ y_{γ γ} |$ are shown and compared to the SM expectations. The data are shown as filled (black) circles. The vertical error bar on each data point represents the total uncertainty in the measured cross section and the shaded (gray) band is the systematic component. The SM prediction, defined using the Powheg nnlops prediction for gluon–gluon fusion and the default MC samples for the other production mechanisms, is presented as a hatched (blue) band, with the width of the band reflecting the total theoretical uncertainty (see text for details). The small contribution from VBF, $V H$ $t \bar{t} H$ and $b \bar{b} H$ is also shown as a (green) histogram and denoted by $X H$ . The default MC has been normalized with the $N^{3} LO$ prediction of Refs. [7, 24, 31, 32, 33, 34]. In addition, the Hres and scetlib+mcfm8 predictions, described in Sec. 9e, are displayed in (a) and (b), respectively.
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Figure 37
The differential cross sections for $p p \to H \to γ γ$ as a function of (a) $H_{T}$ , (b) $| Δ ϕ_{j j} |$ , and (c) $p_{T}^{γ γ j j}$ are shown and compared to the SM expectations. The data and theoretical predictions are presented in the same way as in Fig. 36. In addition, the NNLOJET prediction is displayed in (a), and the Sherpa and GoSam predictions are displayed in (b) and (c). More details of these predictions can be found in Sec. 9e1.
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Figure 38
The differential cross sections for $p p \to H \to γ γ$ as a function of (a) $τ_{C, j 1}$ and (b) $\sum τ_{C, j}$ are shown and compared to the SM expectations. The data and theoretical predictions are presented in the same way as in Fig. 36. In addition, the NNLOJET prediction is displayed in (b).
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Figure 39
(a) The ratio of the first moment (mean) of each differential distribution predicted by the Standard Model to that observed in the data. The SM moment is calculated by using the Powheg nnlops prediction for gluon–gluon fusion and the default MC samples for the other production mechanisms. (b) The ratio of the second moment (RMS) of each differential distribution predicted by the Standard Model to that observed in the data. The intervals on the vertical axes each represent one of the differential distributions. The band for the theoretical prediction represents the corresponding uncertainty in that prediction (see text for details). The error bar on the data represents the total uncertainty in the measurement, with the gray band representing only the systematic uncertainty.
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Figure 40
Observed (left) and expected (right) correlations between the measured simplified template cross sections, including both the statistical and systematic uncertainties. The color indicates the size of the correlation.
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Figure 41
Observed (left) and expected (right) correlations between the measured simplified template cross section ratios, including both the statistical and systematic uncertainties. The color indicates the size of the correlation.
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Figure 42
Observed (top) and expected (bottom) correlations between the measured simplified template cross sections, including both the statistical and systematic uncertainties. The color indicates the size of the correlation.
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Figure 43
Observed (top) and expected (bottom) correlations between the measured simplified template cross sections, including both the statistical and systematic uncertainties. The color indicates the size of the correlation.
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Physical Review D

covering particles, fields, gravitation, and cosmology

Measurements of Higgs boson properties in the diphoton decay channel with $36 {fb}^{- 1}$ of $p p$ collision data at $\sqrt{s} = 13 TeV$ with the ATLAS detector

M. Aaboud et al. (ATLAS Collaboration)

Phys. Rev. D 98, 052005 – Published 18 September 2018

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Physical Review D

covering particles, fields, gravitation, and cosmology

Measurements of Higgs boson properties in the diphoton decay channel with 36 fb−1 of pp collision data at s=13 TeV with the ATLAS detector

M. Aaboud et al. (ATLAS Collaboration)

Phys. Rev. D 98, 052005 – Published 18 September 2018

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Measurements of Higgs boson properties in the diphoton decay channel with $36 {fb}^{- 1}$ of $p p$ collision data at $\sqrt{s} = 13 TeV$ with the ATLAS detector