CMS-HIG-13-023 ; CERN-PH-EP-2013-221 | ||
Measurement of Higgs boson production and properties in the WW decay channel with leptonic final states | ||
CMS Collaboration | ||
4 December 2013 | ||
J. High Energy Phys. 01 (2014) 096 | ||
Abstract: A search for the standard model Higgs boson decaying to a W-boson pair at the LHC is reported. The event sample corresponds to an integrated luminosity of 4.9 and 19.4 fb−1 collected with the CMS detector in pp collisions at √s = 7 and 8 TeV, respectively. The Higgs boson candidates are selected in events with two or three charged leptons. An excess of events above background is observed, consistent with the expectation from the standard model Higgs boson with a mass of around 125 GeV. The probability to observe an excess equal or larger than the one seen, under the background-only hypothesis, corresponds to a significance of 4.3 standard deviations for mH = 125.6 GeV. The observed signal cross section times the branching fraction to WW for mH = 125.6 GeV is 0.72 +0.20−0.18 times the standard model expectation. The spin-parity JP=0+ hypothesis is favored against a narrow resonance with JP=2+ or JP=0− that decays to a W-boson pair. This result provides strong evidence for a Higgs-like boson decaying to a W-boson pair. | ||
Links: e-print arXiv:1312.1129 [hep-ex] (PDF) ; CDS record ; inSPIRE record ; Public twiki page ; CADI line (restricted) ; |
Figures | |
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Figure 1-a:
Distributions of the dilepton invariant mass in the 0-jet category (a), and in the 1-jet category (b), in the eμ final state for the main backgrounds (stacked histograms), and for a SM Higgs boson signal with mH = 125 (superimposed and stacked open histogram) at the WW selection level. The last bin of the histograms includes overflows. |
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Figure 1-b:
Distributions of the dilepton invariant mass in the 0-jet category (a), and in the 1-jet category (b), in the eμ final state for the main backgrounds (stacked histograms), and for a SM Higgs boson signal with mH = 125 (superimposed and stacked open histogram) at the WW selection level. The last bin of the histograms includes overflows. |
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Figure 2-a:
Distributions of the pseudorapidity separation between two highest pT jets (a) and the dijet invariant mass (b) in the 2-jet category for the main backgrounds (stacked histograms), and for a SM Higgs boson signal with mH = 125 GeV (superimposed histogram) at the WW selection level. The signal contributions are multiplied by 100. All three final states, ee, μμ, and eμ, are included. The last bin of the histograms includes overflows. |
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Figure 2-b:
Distributions of the pseudorapidity separation between two highest pT jets (a) and the dijet invariant mass (b) in the 2-jet category for the main backgrounds (stacked histograms), and for a SM Higgs boson signal with mH = 125 GeV (superimposed histogram) at the WW selection level. The signal contributions are multiplied by 100. All three final states, ee, μμ, and eμ, are included. The last bin of the histograms includes overflows. |
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Figure 3-a:
Two-dimensional (mT, mℓℓ) distributions for 8 TeV data in the 0-jet category for the mH = 125 GeV SM Higgs boson signal hypothesis (a), the 2+min hypothesis (b), the background processes (c), and the data (d). The distributions are restricted to the signal region expected for a low mass Higgs boson, that is: mℓℓ [12--100] GeV and mT [60--120] GeV . |
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Figure 3-b:
Two-dimensional (mT, mℓℓ) distributions for 8 TeV data in the 0-jet category for the mH = 125 GeV SM Higgs boson signal hypothesis (a), the 2+min hypothesis (b), the background processes (c), and the data (d). The distributions are restricted to the signal region expected for a low mass Higgs boson, that is: mℓℓ [12--100] GeV and mT [60--120] GeV . |
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Figure 3-c:
Two-dimensional (mT, mℓℓ) distributions for 8 TeV data in the 0-jet category for the mH = 125 GeV SM Higgs boson signal hypothesis (a), the 2+min hypothesis (b), the background processes (c), and the data (d). The distributions are restricted to the signal region expected for a low mass Higgs boson, that is: mℓℓ [12--100] GeV and mT [60--120] GeV . |
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Figure 3-d:
Two-dimensional (mT, mℓℓ) distributions for 8 TeV data in the 0-jet category for the mH = 125 GeV SM Higgs boson signal hypothesis (a), the 2+min hypothesis (b), the background processes (c), and the data (d). The distributions are restricted to the signal region expected for a low mass Higgs boson, that is: mℓℓ [12--100] GeV and mT [60--120] GeV . |
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Figure 4-a:
Two-dimensional (mT, mℓℓ) distributions in the 1-jet category for the mH = 125 GeV SM Higgs boson signal hypothesis (a), the 2+min hypothesis (b), the background processes (c), and the data (d). The distributions are restricted to the signal region expected for a low mass Higgs boson, that is: mℓℓ [12--100] GeV and mT [60--120] GeV . |
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Figure 4-b:
Two-dimensional (mT, mℓℓ) distributions in the 1-jet category for the mH = 125 GeV SM Higgs boson signal hypothesis (a), the 2+min hypothesis (b), the background processes (c), and the data (d). The distributions are restricted to the signal region expected for a low mass Higgs boson, that is: mℓℓ [12--100] GeV and mT [60--120] GeV . |
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Figure 4-c:
Two-dimensional (mT, mℓℓ) distributions in the 1-jet category for the mH = 125 GeV SM Higgs boson signal hypothesis (a), the 2+min hypothesis (b), the background processes (c), and the data (d). The distributions are restricted to the signal region expected for a low mass Higgs boson, that is: mℓℓ [12--100] GeV and mT [60--120] GeV . |
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Figure 4-d:
Two-dimensional (mT, mℓℓ) distributions in the 1-jet category for the mH = 125 GeV SM Higgs boson signal hypothesis (a), the 2+min hypothesis (b), the background processes (c), and the data (d). The distributions are restricted to the signal region expected for a low mass Higgs boson, that is: mℓℓ [12--100] GeV and mT [60--120] GeV . |
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Figure 5-a:
Evolution of mR distribution with Higgs boson mass hypotheses (a), and distribution of mR for signal and different backgrounds (b), all normalized to unity, for the 0-jet category in the eμ final state. |
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Figure 5-b:
Evolution of mR distribution with Higgs boson mass hypotheses (a), and distribution of mR for signal and different backgrounds (b), all normalized to unity, for the 0-jet category in the eμ final state. |
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Figure 6-a:
Expected and observed 95% CL upper limits on the H→WW production cross section relative to the SM Higgs boson expectation using the counting analysis (a) and the shape-based template fit approach (b) in the 0-jet and 1-jet categories. The shape-based analysis results use a binned template fit to (mT, mℓℓ) for the eμ final state, combined with the counting analysis results for the ee/μμ final states. |
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Figure 6-b:
Expected and observed 95% CL upper limits on the H→WW production cross section relative to the SM Higgs boson expectation using the counting analysis (a) and the shape-based template fit approach (b) in the 0-jet and 1-jet categories. The shape-based analysis results use a binned template fit to (mT, mℓℓ) for the eμ final state, combined with the counting analysis results for the ee/μμ final states. |
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Figure 7-a:
The mT distribution in the eμ final state for the 0-jet and 1-jet categories combined for observed data superimposed on signal + background events and separately for the signal events alone (a) and background-subtracted data with best-fit signal component (b). The signal and background processes are normalized to the result of the template fit to the (mT, mℓℓ) distribution and weighted according to the observed S/(S+B) ratio in each bin of the mℓℓ distribution integrating over the mT variable. To better visualize a peak structure, an extended mT range including mT=[40,60] GeV is shown, with the normalization of signal and background events extrapolated from the fit result. |
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Figure 7-b:
The mT distribution in the eμ final state for the 0-jet and 1-jet categories combined for observed data superimposed on signal + background events and separately for the signal events alone (a) and background-subtracted data with best-fit signal component (b). The signal and background processes are normalized to the result of the template fit to the (mT, mℓℓ) distribution and weighted according to the observed S/(S+B) ratio in each bin of the mℓℓ distribution integrating over the mT variable. To better visualize a peak structure, an extended mT range including mT=[40,60] GeV is shown, with the normalization of signal and background events extrapolated from the fit result. |
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Figure 8-a:
The mℓℓ distribution in the eμ final state for the 0-jet and 1-jet categories combined for observed data superimposed on signal + background events, and separately for the signal events alone (a) and background-subtracted data with best-fit signal component (b). The signal and background processes are normalized to the result of the template fit to the (mT, mℓℓ) distribution and weighted according to the observed S/(S+B) ratio in each bin of the mT distribution integrating over the mℓℓ variable. |
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Figure 8-b:
The mℓℓ distribution in the eμ final state for the 0-jet and 1-jet categories combined for observed data superimposed on signal + background events, and separately for the signal events alone (a) and background-subtracted data with best-fit signal component (b). The signal and background processes are normalized to the result of the template fit to the (mT, mℓℓ) distribution and weighted according to the observed S/(S+B) ratio in each bin of the mT distribution integrating over the mℓℓ variable. |
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Figure 9-a:
Distributions of mR showing the composition of signal and backgrounds, superimposed on the signal events alone, in the eμ final state for the 0-jet (a) and 1-jet (b) categories for √s = 8 TeV. The signal and background processes are normalized to the result of the parametric fit to the (mR, ΔϕR) distribution. |
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Figure 9-b:
Distributions of mR showing the composition of signal and backgrounds, superimposed on the signal events alone, in the eμ final state for the 0-jet (a) and 1-jet (b) categories for √s = 8 TeV. The signal and background processes are normalized to the result of the parametric fit to the (mR, ΔϕR) distribution. |
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Figure 10-a:
The background-subtracted data distribution for mR (a) and ΔϕR (b) with the best-fit superimposed for the 0-jet and 1-jet categories combined for √s = 7 and 8 TeV. The signal and background processes are normalized to the result of the parametric fit to the (mR, ΔϕR) distribution. The events are weighted according to the observed S/(S+B) ratio of the second variable. |
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Figure 10-b:
The background-subtracted data distribution for mR (a) and ΔϕR (b) with the best-fit superimposed for the 0-jet and 1-jet categories combined for √s = 7 and 8 TeV. The signal and background processes are normalized to the result of the parametric fit to the (mR, ΔϕR) distribution. The events are weighted according to the observed S/(S+B) ratio of the second variable. |
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Figure 11-a:
Distributions of mT (a, c) and mℓℓ (b, d) extrapolated to the control regions CR1 (a, b) and CR2 (c, d) in the 0-jet bin category, after fitting the other control region. |
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Figure 11-b:
Distributions of mT (a, c) and mℓℓ (b, d) extrapolated to the control regions CR1 (a, b) and CR2 (c, d) in the 0-jet bin category, after fitting the other control region. |
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Figure 11-c:
Distributions of mT (a, c) and mℓℓ (b, d) extrapolated to the control regions CR1 (a, b) and CR2 (c, d) in the 0-jet bin category, after fitting the other control region. |
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Figure 11-d:
Distributions of mT (a, c) and mℓℓ (b, d) extrapolated to the control regions CR1 (a, b) and CR2 (c, d) in the 0-jet bin category, after fitting the other control region. |
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Figure 12-a:
Distributions of the dilepton mass (a) in the same-charge dilepton control region in the 0-jet category and the transverse mass (b) in the top-tagged control region in the 1-jet category of the eμ final state. |
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Figure 12-b:
Distributions of the dilepton mass (a) in the same-charge dilepton control region in the 0-jet category and the transverse mass (b) in the top-tagged control region in the 1-jet category of the eμ final state. |
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Figure 13-a:
The mℓℓ distributions for the data and background predictions for 7 TeV (a) and 8 TeV (b) analyses in the different-flavor final state for the 2-jet category with VBF tag. Selection criteria correspond to a Higgs boson mass of 125 GeV for the shape-based analysis. The uncertainty bands correspond to the sum of the statistical and systematic uncertainties in the background processes. The expected contribution for a Higgs boson signal with mH = 125 GeV (red open histogram) is also shown, both separately and stacked with the background histograms. For illustration purposes the region between 250 and 600 GeV is not shown in the figures, but is used in the measurement. |
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Figure 13-b:
The mℓℓ distributions for the data and background predictions for 7 TeV (a) and 8 TeV (b) analyses in the different-flavor final state for the 2-jet category with VBF tag. Selection criteria correspond to a Higgs boson mass of 125 GeV for the shape-based analysis. The uncertainty bands correspond to the sum of the statistical and systematic uncertainties in the background processes. The expected contribution for a Higgs boson signal with mH = 125 GeV (red open histogram) is also shown, both separately and stacked with the background histograms. For illustration purposes the region between 250 and 600 GeV is not shown in the figures, but is used in the measurement. |
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Figure 14-a:
Expected and observed 95% CL upper limits on the H→WW production cross section relative to the SM Higgs boson expectation using the counting analysis (a), and shape-based template fit approach (b) in the 2-jet category with VBF tag. The shape-based analysis results use the one-dimensional binned template fit to mℓℓ distribution for the eμ final state, combined with counting analysis inputs for the ee/μμ final states. |
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Figure 14-b:
Expected and observed 95% CL upper limits on the H→WW production cross section relative to the SM Higgs boson expectation using the counting analysis (a), and shape-based template fit approach (b) in the 2-jet category with VBF tag. The shape-based analysis results use the one-dimensional binned template fit to mℓℓ distribution for the eμ final state, combined with counting analysis inputs for the ee/μμ final states. |
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Figure 15:
The mℓℓ distribution for mH = 125 GeV used as input to the template fit in the eμ final state for the VH analysis after the corresponding selection at √s=8TeV. |
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Figure 16-a:
Expected and observed 95% CL upper limits on the H→WW production cross section relative to the SM Higgs boson expectation using the counting analysis (a), and the shape-based template fit approach (b) in the VH category. The shape-based analysis results use the one-dimensional binned template fit to the mℓℓ distribution for the eμ final state, combined with counting analysis results for the ee/μμ final states. |
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Figure 16-b:
Expected and observed 95% CL upper limits on the H→WW production cross section relative to the SM Higgs boson expectation using the counting analysis (a), and the shape-based template fit approach (b) in the VH category. The shape-based analysis results use the one-dimensional binned template fit to the mℓℓ distribution for the eμ final state, combined with counting analysis results for the ee/μμ final states. |
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Figure 17-a:
The ΔRℓ+ℓ− distribution, after applying all other requirements for the WH→3ℓ3ν analysis, in the SSSF final state at 7 TeV (a), the OSSF final state at 7 TeV (b), the SSSF final state at 8 TeV (c), and the OSSF final state at 8 TeV (d). The legend entry labeled as ``non-prompt" is the combination of the backgrounds from Z+jets and top-quark decays. |
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Figure 17-b:
The ΔRℓ+ℓ− distribution, after applying all other requirements for the WH→3ℓ3ν analysis, in the SSSF final state at 7 TeV (a), the OSSF final state at 7 TeV (b), the SSSF final state at 8 TeV (c), and the OSSF final state at 8 TeV (d). The legend entry labeled as ``non-prompt" is the combination of the backgrounds from Z+jets and top-quark decays. |
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Figure 17-c:
The ΔRℓ+ℓ− distribution, after applying all other requirements for the WH→3ℓ3ν analysis, in the SSSF final state at 7 TeV (a), the OSSF final state at 7 TeV (b), the SSSF final state at 8 TeV (c), and the OSSF final state at 8 TeV (d). The legend entry labeled as ``non-prompt" is the combination of the backgrounds from Z+jets and top-quark decays. |
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Figure 17-d:
The ΔRℓ+ℓ− distribution, after applying all other requirements for the WH→3ℓ3ν analysis, in the SSSF final state at 7 TeV (a), the OSSF final state at 7 TeV (b), the SSSF final state at 8 TeV (c), and the OSSF final state at 8 TeV (d). The legend entry labeled as ``non-prompt" is the combination of the backgrounds from Z+jets and top-quark decays. |
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Figure 18-a:
Expected and observed 95% CL upper limits on the signal production cross section relative to the SM Higgs boson expectation using the counting analysis (left) and the shape-based template fit approach (right) in the WH→3ℓ3ν category. |
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Figure 18-b:
Expected and observed 95% CL upper limits on the signal production cross section relative to the SM Higgs boson expectation using the counting analysis (left) and the shape-based template fit approach (right) in the WH→3ℓ3ν category. |
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Figure 19-a:
The mℓν2jT distribution after all other requirements for the ZH→3ℓν+ 2 jets analysis at 7 TeV (a), and at 8 TeV (b). The signal yield (red open histogram) is multiplied by 10 with respect to the SM expectation. The legend entry labeled as ``non-prompt'' is the combination of the backgrounds from Z+jets and top-quark decays. |
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Figure 19-b:
The mℓν2jT distribution after all other requirements for the ZH→3ℓν+ 2 jets analysis at 7 TeV (a), and at 8 TeV (b). The signal yield (red open histogram) is multiplied by 10 with respect to the SM expectation. The legend entry labeled as ``non-prompt'' is the combination of the backgrounds from Z+jets and top-quark decays. |
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Figure 20-a:
Expected and observed 95% CL upper limits on the signal production cross section relative to the SM Higgs boson expectation using the counting analysis (left) and the shape-based template fit approach (right) in the ZH→3ℓν+ 2 jets category. |
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Figure 20-b:
Expected and observed 95% CL upper limits on the signal production cross section relative to the SM Higgs boson expectation using the counting analysis (left) and the shape-based template fit approach (right) in the ZH→3ℓν+ 2 jets category. |
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Figure 21-a:
Expected 95% CL upper limits on the H→WW production cross section relative to the SM expectation, shown as a function of the SM Higgs boson mass hypothesis, individually for each search category considered in the combination, and the combined result from all categories (top). Expected and observed results are shown with no assumptions on the presence of a Higgs boson (bottom left) and considering the SM Higgs boson with mH = 125.6 GeV as part of the background processes (bottom right). As expected, the excess observed on the bottom left distribution is reduced on the bottom right by considering the SM Higgs boson with mH = 125.6 GeV as part of the background processes. |
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Figure 21-b:
Expected 95% CL upper limits on the H→WW production cross section relative to the SM expectation, shown as a function of the SM Higgs boson mass hypothesis, individually for each search category considered in the combination, and the combined result from all categories (top). Expected and observed results are shown with no assumptions on the presence of a Higgs boson (bottom left) and considering the SM Higgs boson with mH = 125.6 GeV as part of the background processes (bottom right). As expected, the excess observed on the bottom left distribution is reduced on the bottom right by considering the SM Higgs boson with mH = 125.6 GeV as part of the background processes. |
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Figure 21-c:
Expected 95% CL upper limits on the H→WW production cross section relative to the SM expectation, shown as a function of the SM Higgs boson mass hypothesis, individually for each search category considered in the combination, and the combined result from all categories (top). Expected and observed results are shown with no assumptions on the presence of a Higgs boson (bottom left) and considering the SM Higgs boson with mH = 125.6 GeV as part of the background processes (bottom right). As expected, the excess observed on the bottom left distribution is reduced on the bottom right by considering the SM Higgs boson with mH = 125.6 GeV as part of the background processes. |
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Figure 22-a:
Expected significance as a function of the SM Higgs boson mass, individually for each search category considered in the combination, and the combined result from all categories (a). Expected and observed significance (b), and observed σ/σSM (c) as a function of the SM Higgs boson mass for the combination of all H→WW categories. The very large expected significance at mH∼ 160 GeV is due to the branching fraction to WW close to unity for those masses. |
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Figure 22-b:
Expected significance as a function of the SM Higgs boson mass, individually for each search category considered in the combination, and the combined result from all categories (a). Expected and observed significance (b), and observed σ/σSM (c) as a function of the SM Higgs boson mass for the combination of all H→WW categories. The very large expected significance at mH∼ 160 GeV is due to the branching fraction to WW close to unity for those masses. |
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Figure 22-c:
Expected significance as a function of the SM Higgs boson mass, individually for each search category considered in the combination, and the combined result from all categories (a). Expected and observed significance (b), and observed σ/σSM (c) as a function of the SM Higgs boson mass for the combination of all H→WW categories. The very large expected significance at mH∼ 160 GeV is due to the branching fraction to WW close to unity for those masses. |
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Figure 23:
Observed σ/σSM for mH = 125.6 GeV for each category used in the combination. The observed σ/σSM value in the ZH→3ℓν2 jets category is 6.41 +7.43−6.38. Given its relatively large uncertainty with respect to the other categories it is not shown individually, but it is used in the combination. |
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Figure 24-a:
Confidence intervals in the (σ/σSM, mH) plane using the parametric unbinned fit in (mR, ΔϕR) distribution (a) for the 0-jet and 1-jet categories in the eμ final states. Solid and dashed lines indicate the 68% and 95% CL contours, respectively. On Fig.24-b, the one-dimensional likelihood profile for σ/σSM = 1 is shown. The crossings with the horizontal line at −2ΔlnL = 1 (3.84) define the 68% (95%) CL interval. The SM Higgs boson production cross section uncertainties are considered. |
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Figure 24-b:
Confidence intervals in the (σ/σSM, mH) plane using the parametric unbinned fit in (mR, ΔϕR) distribution (a) for the 0-jet and 1-jet categories in the eμ final states. Solid and dashed lines indicate the 68% and 95% CL contours, respectively. On Fig.24-b, the one-dimensional likelihood profile for σ/σSM = 1 is shown. The crossings with the horizontal line at −2ΔlnL = 1 (3.84) define the 68% (95%) CL interval. The SM Higgs boson production cross section uncertainties are considered. |
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Figure 25:
Likelihood profiles on μggH and μVBF,VH at 68% (solid) and 95% CL (dotted). The expected (black) and observed (red) distributions for mH = 125.6 GeV are shown. |
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Figure 26-a:
Expected and observed likelihood profiles for mH = 125.6 GeV for the three production modes separately, ggH (a), VBF (b), and VH (c). In each case, the modifiers for the other productions modes are profiled. The crossings with the horizontal line at −2ΔlnL = 1 (3.84) define the 68% (95%) CL interval. |
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Figure 26-b:
Expected and observed likelihood profiles for mH = 125.6 GeV for the three production modes separately, ggH (a), VBF (b), and VH (c). In each case, the modifiers for the other productions modes are profiled. The crossings with the horizontal line at −2ΔlnL = 1 (3.84) define the 68% (95%) CL interval. |
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Figure 26-c:
Expected and observed likelihood profiles for mH = 125.6 GeV for the three production modes separately, ggH (a), VBF (b), and VH (c). In each case, the modifiers for the other productions modes are profiled. The crossings with the horizontal line at −2ΔlnL = 1 (3.84) define the 68% (95%) CL interval. |
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Figure 27-a:
The two-dimensional likelihood of the κV and κf parameters (a). The observed value (red) and the SM expectation (black) are shown, together with the 68% (solid) and 95% (dotted) CL contours. The likelihood scan versus BRBSM (b) for the observed data (solid) and the expectation (dashed) in the presence of the SM Higgs boson with mH = 125.6 GeV are shown. The crossing with the horizontal line at −2ΔlnL = 1 (3.84) defines the 68% (95%) CL. The parameters κV and κf are profiled in the scan of BRBSM, with κV≤1. |
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Figure 27-b:
The two-dimensional likelihood of the κV and κf parameters (a). The observed value (red) and the SM expectation (black) are shown, together with the 68% (solid) and 95% (dotted) CL contours. The likelihood scan versus BRBSM (b) for the observed data (solid) and the expectation (dashed) in the presence of the SM Higgs boson with mH = 125.6 GeV are shown. The crossing with the horizontal line at −2ΔlnL = 1 (3.84) defines the 68% (95%) CL. The parameters κV and κf are profiled in the scan of BRBSM, with κV≤1. |
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Figure 28-a:
Distributions of −2ln(L2+min/L0+), combining the 0-jet and 1-jet categories in the eμ final state, for the 0+ and 2+min hypotheses at mH = 125.6 GeV. The distributions are produced assuming σ/σSM=1 (a, c) and using the σ/σSM value determined from the fit to data (b, d). The distributions are shown for the case fq¯q=0% (a, b) and fq¯q=100% (c, d). The observed value is indicated by the red arrow. |
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Figure 28-b:
Distributions of −2ln(L2+min/L0+), combining the 0-jet and 1-jet categories in the eμ final state, for the 0+ and 2+min hypotheses at mH = 125.6 GeV. The distributions are produced assuming σ/σSM=1 (a, c) and using the σ/σSM value determined from the fit to data (b, d). The distributions are shown for the case fq¯q=0% (a, b) and fq¯q=100% (c, d). The observed value is indicated by the red arrow. |
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Figure 28-c:
Distributions of −2ln(L2+min/L0+), combining the 0-jet and 1-jet categories in the eμ final state, for the 0+ and 2+min hypotheses at mH = 125.6 GeV. The distributions are produced assuming σ/σSM=1 (a, c) and using the σ/σSM value determined from the fit to data (b, d). The distributions are shown for the case fq¯q=0% (a, b) and fq¯q=100% (c, d). The observed value is indicated by the red arrow. |
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Figure 28-d:
Distributions of −2ln(L2+min/L0+), combining the 0-jet and 1-jet categories in the eμ final state, for the 0+ and 2+min hypotheses at mH = 125.6 GeV. The distributions are produced assuming σ/σSM=1 (a, c) and using the σ/σSM value determined from the fit to data (b, d). The distributions are shown for the case fq¯q=0% (a, b) and fq¯q=100% (c, d). The observed value is indicated by the red arrow. |
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Figure 29-a:
Median test statistic for the 0+ and 2+min hypotheses, as a function of fq¯q of the 2+min particle, assuming σ/σSM=1 (a) and using the σ/σSM value determined from the fit to data (b). The observed values are also reported in the second case. |
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Figure 29-b:
Median test statistic for the 0+ and 2+min hypotheses, as a function of fq¯q of the 2+min particle, assuming σ/σSM=1 (a) and using the σ/σSM value determined from the fit to data (b). The observed values are also reported in the second case. |
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Figure 30-a:
Distributions of −2ln(L0−/L0+), combining the 0-jet and 1-jet categories in the eμ final state, for the 0+ and 0− hypotheses at mH =125.6 GeV. The distributions are produced assuming σ/σSM = 1 (a) and using the signal strength determined from the fit to data (b). The observed value is indicated by the red arrow. |
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Figure 30-b:
Distributions of −2ln(L0−/L0+), combining the 0-jet and 1-jet categories in the eμ final state, for the 0+ and 0− hypotheses at mH =125.6 GeV. The distributions are produced assuming σ/σSM = 1 (a) and using the signal strength determined from the fit to data (b). The observed value is indicated by the red arrow. |
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Figure 31:
The mℓℓ mass distribution for opposite-sign muons after the Wγ∗ selection. The Wγ∗ contribution is normalized to match the data. |
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Figure 32-a:
The mℓℓ (a) and mT (b) distributions for the W+γ process in events passing the dilepton selection. The dots show the distribution from simulated events, while the histogram shows the distribution from a data sample with a lepton and a photon, which has about 200 times more events. |
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Figure 32-b:
The mℓℓ (a) and mT (b) distributions for the W+γ process in events passing the dilepton selection. The dots show the distribution from simulated events, while the histogram shows the distribution from a data sample with a lepton and a photon, which has about 200 times more events. |
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Figure 33-a:
The Rout/in values as a function of the multivariate Drell-Yan output variable in the 0-jet (a) and 1-jet (b) categories for the mH = 125 GeV counting analysis at √s = 8 TeV. High output values are signal-like events, while low output values are more likely to be Drell-Yan events. The vertical dashed line indicates the minimum threshold on the discriminant value used to select events for the analysis, which is 0.88 for the 0-jet and 0.84 for the 1-jet category. The dependence of the Rout/in ratio on the Drell--Yan discriminant value and the agreement between the data and the simulation are studied in the regions below this threshold. |
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Figure 33-b:
The Rout/in values as a function of the multivariate Drell-Yan output variable in the 0-jet (a) and 1-jet (b) categories for the mH = 125 GeV counting analysis at √s = 8 TeV. High output values are signal-like events, while low output values are more likely to be Drell-Yan events. The vertical dashed line indicates the minimum threshold on the discriminant value used to select events for the analysis, which is 0.88 for the 0-jet and 0.84 for the 1-jet category. The dependence of the Rout/in ratio on the Drell--Yan discriminant value and the agreement between the data and the simulation are studied in the regions below this threshold. |
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Figure 34-a:
The mℓℓ (a) and mT (b) distributions in the 0-jet category for top-tagged events in the different-flavor final state at the WW selection level for √s=8TeV data sample. The uncertainty band includes the statistical and systematic uncertainty of all background processes. |
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Figure 34-b:
The mℓℓ (a) and mT (b) distributions in the 0-jet category for top-tagged events in the different-flavor final state at the WW selection level for √s=8TeV data sample. The uncertainty band includes the statistical and systematic uncertainty of all background processes. |
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Figure 35-a:
The mℓℓ (a) and mT (b) distributions in the 1-jet category for top-tagged events in the different-flavor final state at the WW selection level for the √s = 8 TeV data sample. The uncertainty band includes the statistical and systematic uncertainty of all background processes. |
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Figure 35-b:
The mℓℓ (a) and mT (b) distributions in the 1-jet category for top-tagged events in the different-flavor final state at the WW selection level for the √s = 8 TeV data sample. The uncertainty band includes the statistical and systematic uncertainty of all background processes. |
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Figure 36-a:
The mℓℓ (a) and mT (b) distributions in the 2-jet category for top-tagged events after applying the WW and VBF-tag selections for the √s = 8 TeV data sample. The uncertainty band includes the statistical and systematic uncertainty for all background processes. |
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Figure 36-b:
The mℓℓ (a) and mT (b) distributions in the 2-jet category for top-tagged events after applying the WW and VBF-tag selections for the √s = 8 TeV data sample. The uncertainty band includes the statistical and systematic uncertainty for all background processes. |
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Compact Muon Solenoid LHC, CERN |
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