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CMS-HIG-13-004 ; CERN-PH-EP-2014-001
Evidence for the 125 GeV Higgs boson decaying to a pair of τ leptons
J. High Energy Phys. 05 (2014) 104
Abstract: A search for a standard model Higgs boson decaying into a pair of tau leptons is performed using events recorded by the CMS experiment at the LHC in 2011 and 2012. The dataset corresponds to an integrated luminosity of 4.9 fb1 at a centre-of-mass energy of 7 TeV, and 19.7 fb1 at 8 TeV. Each tau lepton decays hadronically or leptonically to an electron or a muon, leading to six different final states for the tau-lepton pair, all considered in this analysis. An excess of events is observed over the expected background contributions, with a local significance larger than 3 standard deviations for mH values between 115 and 130 GeV. The best fit of the observed Hττ signal cross section for mH = 125 GeV is 0.78 ± 0.27 times the standard model expectation. These observations constitute evidence for the 125 GeV Higgs boson decaying to a pair of tau leptons.
Figures CMS Publications
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Figure 1-a:
Leading-order Feynman diagrams for Higgs boson production through gluon-gluon fusion (a), vector boson fusion (b), and the associated production with a W or a Z boson (c).

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Figure 1-b:
Leading-order Feynman diagrams for Higgs boson production through gluon-gluon fusion (a), vector boson fusion (b), and the associated production with a W or a Z boson (c).

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Figure 1-c:
Leading-order Feynman diagrams for Higgs boson production through gluon-gluon fusion (a), vector boson fusion (b), and the associated production with a W or a Z boson (c).

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Figure 2:
Observed and predicted distributions for the visible τh mass, mvisτh, in the μτh channel after the baseline selection described in section Event Selection. The yields predicted for the Zττ, Zμμ, electroweak, t¯t, and QCD multijet background contributions correspond to the result of the final fit presented in Section Results. The Zττ contribution is then split according to the decay mode reconstructed by the hadron-plus-strips algorithm as shown in the legend. The mass distribution of the τh built from one charged hadron and photons peaks near the mass of the intermediate ρ(770) resonance; the mass distribution of the τh built from three charged hadrons peaks around the mass of the intermediate a1(1260) resonance. The τh built from one charged hadron and no photons are reconstructed with the π± mass, assigned to all charged hadrons by the PF algorithm, and constitute the main contribution to the third bin of this histogram. The first two bins correspond to τ± leptons decaying into e±νν and μ±νν, respectively, and for which the electron or muon is misidentified as a τh. The electroweak background contribution is dominated by W+jets production. In most selected W+jets, t¯t, and QCD multijet events, a jet is misidentified as a τh. The ``bkg. uncertainty'' band represents the combined statistical and systematic uncertainty in the background yield in each bin. The expected contribution from the SM Higgs signal is negligible.

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Figure 3-a:
Normalized distributions obtained in the μτh channel after the baseline selection for (a) the invariant mass, mvis, of the visible decay products of the two τ leptons, and (b) the \textsc {svfit} mass, mττ. The distribution obtained for a simulated sample of Zττ events (shaded histogram) is compared to the one obtained for a signal sample with a SM Higgs boson of mass mH = 125 GeV (open histogram).

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Figure 3-b:
Normalized distributions obtained in the μτh channel after the baseline selection for (a) the invariant mass, mvis, of the visible decay products of the two τ leptons, and (b) the \textsc {svfit} mass, mττ. The distribution obtained for a simulated sample of Zττ events (shaded histogram) is compared to the one obtained for a signal sample with a SM Higgs boson of mass mH = 125 GeV (open histogram).

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Figure 4:
Event categories for the LL channels. The pTττ variable is the transverse momentum of the Higgs boson candidate. In the definition of the VBF-tagged categories, |Δηjj| is the difference in pseudorapidity between the two highest-pT jets, and mjj their invariant mass. In the μμ and ee channels, events with two or more jets are not required to fulfil any additional VBF tagging criteria. For the analysis of the 7 TeV eτh and μτh data, the loose and tight VBF-tagged categories are merged into a single VBF-tagged category. In the eτh channel, the EmissT is required to be larger than 30 GeV in the 1-jet category. Therefore, the high-pTτh category is not used and is accordingly crossed out. The term ``baseline'' refers to the baseline selection described in section Event Selection.

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Figure 5-a:
Observed and predicted distributions in the μτh channel after the baseline selection, for (a) the transverse momentum of the Higgs boson candidates and (b) the transverse momentum of the τh. The yields predicted for the various background contributions correspond to the result of the final fit presented in Section {sec:results}. The electroweak background contribution includes events from W+jets, diboson, and single-top-quark production. The ``bkg. uncertainty'' band represents the combined statistical and systematic uncertainty in the background yield in each bin. In each plot, the bottom inset shows the ratio of the observed and predicted numbers of events. The expected contribution from the SM Higgs signal is negligible.

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Figure 5-b:
Observed and predicted distributions in the μτh channel after the baseline selection, for (a) the transverse momentum of the Higgs boson candidates and (b) the transverse momentum of the τh. The yields predicted for the various background contributions correspond to the result of the final fit presented in Section {sec:results}. The electroweak background contribution includes events from W+jets, diboson, and single-top-quark production. The ``bkg. uncertainty'' band represents the combined statistical and systematic uncertainty in the background yield in each bin. In each plot, the bottom inset shows the ratio of the observed and predicted numbers of events. The expected contribution from the SM Higgs signal is negligible.

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Figure 6:
Observed and predicted mT distribution in the 8 TeV μτh analysis after the baseline selection but before applying the mT< 30 GeV requirement, illustrated as a dotted vertical line. The dashed line delimits the high-mT control region that is used to normalize the yield of the W+jets contribution in the analysis as described in the text. The yields predicted for the various background contributions correspond to the result of the final fit presented in Section {sec:results}. The electroweak background contribution includes events from W+jets, diboson, and single-top-quark production. The ``bkg. uncertainty'' band represents the combined statistical and systematic uncertainty in the background yield in each bin. The bottom inset shows the ratio of the observed and predicted numbers of events. The expected contribution from a SM Higgs signal is negligible.

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Figure 7:
Observed and predicted distribution for the number of jets in the 8 TeV eμ analysis after the baseline selection described in section Event Selection. The yields predicted for the various background contributions correspond to the result of the final fit presented in Section Results. The electroweak background contribution includes events from diboson and single-top-quark production. The ``bkg. uncertainty'' band represents the combined statistical and systematic uncertainty in the background yield in each bin. The bottom inset shows the ratio of the observed and predicted numbers of events. The expected contribution from a SM Higgs signal is negligible.

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Figure 8-a:
Observed and predicted mττ distributions in the 8 TeV μτh (a, c, e) and eτh (b, d, f) channels, and for the 1-jet high-pTτh boosted (a, b), loose VBF tag (c, d), and tight VBF tag (e, f) categories. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 8-b:
Observed and predicted mττ distributions in the 8 TeV μτh (a, c, e) and eτh (b, d, f) channels, and for the 1-jet high-pTτh boosted (a, b), loose VBF tag (c, d), and tight VBF tag (e, f) categories. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 8-c:
Observed and predicted mττ distributions in the 8 TeV μτh (a, c, e) and eτh (b, d, f) channels, and for the 1-jet high-pTτh boosted (a, b), loose VBF tag (c, d), and tight VBF tag (e, f) categories. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 8-d:
Observed and predicted mττ distributions in the 8 TeV μτh (a, c, e) and eτh (b, d, f) channels, and for the 1-jet high-pTτh boosted (a, b), loose VBF tag (c, d), and tight VBF tag (e, f) categories. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 8-e:
Observed and predicted mττ distributions in the 8 TeV μτh (a, c, e) and eτh (b, d, f) channels, and for the 1-jet high-pTτh boosted (a, b), loose VBF tag (c, d), and tight VBF tag (e, f) categories. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 8-f:
Observed and predicted mττ distributions in the 8 TeV μτh (a, c, e) and eτh (b, d, f) channels, and for the 1-jet high-pTτh boosted (a, b), loose VBF tag (c, d), and tight VBF tag (e, f) categories. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 9-a:
Observed and predicted mττ distributions in the 8 TeV τhτh (a, c, e) channel for the 1-jet boosted (a, b), 1-jet highly-boosted (c, d), and VBF-tagged (bottom) categories, and in the 8 TeV eμ (e, f) channel for the 1-jet high-pTμ (a, b), loose VBF tag (c, d) and tight VBF tag (e, f) categories. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. In the eμ channel, the expected contribution from HWW decays is shown separately. The signal and background histograms are stacked.

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Figure 9-b:
Observed and predicted mττ distributions in the 8 TeV τhτh (a, c, e) channel for the 1-jet boosted (a, b), 1-jet highly-boosted (c, d), and VBF-tagged (bottom) categories, and in the 8 TeV eμ (e, f) channel for the 1-jet high-pTμ (a, b), loose VBF tag (c, d) and tight VBF tag (e, f) categories. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. In the eμ channel, the expected contribution from HWW decays is shown separately. The signal and background histograms are stacked.

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Figure 9-c:
Observed and predicted mττ distributions in the 8 TeV τhτh (a, c, e) channel for the 1-jet boosted (a, b), 1-jet highly-boosted (c, d), and VBF-tagged (bottom) categories, and in the 8 TeV eμ (e, f) channel for the 1-jet high-pTμ (a, b), loose VBF tag (c, d) and tight VBF tag (e, f) categories. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. In the eμ channel, the expected contribution from HWW decays is shown separately. The signal and background histograms are stacked.

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Figure 9-d:
Observed and predicted mττ distributions in the 8 TeV τhτh (a, c, e) channel for the 1-jet boosted (a, b), 1-jet highly-boosted (c, d), and VBF-tagged (bottom) categories, and in the 8 TeV eμ (e, f) channel for the 1-jet high-pTμ (a, b), loose VBF tag (c, d) and tight VBF tag (e, f) categories. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. In the eμ channel, the expected contribution from HWW decays is shown separately. The signal and background histograms are stacked.

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Figure 9-e:
Observed and predicted mττ distributions in the 8 TeV τhτh (a, c, e) channel for the 1-jet boosted (a, b), 1-jet highly-boosted (c, d), and VBF-tagged (bottom) categories, and in the 8 TeV eμ (e, f) channel for the 1-jet high-pTμ (a, b), loose VBF tag (c, d) and tight VBF tag (e, f) categories. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. In the eμ channel, the expected contribution from HWW decays is shown separately. The signal and background histograms are stacked.

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Figure 9-f:
Observed and predicted mττ distributions in the 8 TeV τhτh (a, c, e) channel for the 1-jet boosted (a, b), 1-jet highly-boosted (c, d), and VBF-tagged (bottom) categories, and in the 8 TeV eμ (e, f) channel for the 1-jet high-pTμ (a, b), loose VBF tag (c, d) and tight VBF tag (e, f) categories. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. In the eμ channel, the expected contribution from HWW decays is shown separately. The signal and background histograms are stacked.

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Figure 10-a:
Observed and predicted distributions for the final discriminator D in the 8 TeV μμ (a, c, e) and ee (b, d, f) channels, and for the 0-jet high-pT (a, b), 1-jet high-pT (c, d), and 2-jet (e, f) categories. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 10-b:
Observed and predicted distributions for the final discriminator D in the 8 TeV μμ (a, c, e) and ee (b, d, f) channels, and for the 0-jet high-pT (a, b), 1-jet high-pT (c, d), and 2-jet (e, f) categories. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 10-c:
Observed and predicted distributions for the final discriminator D in the 8 TeV μμ (a, c, e) and ee (b, d, f) channels, and for the 0-jet high-pT (a, b), 1-jet high-pT (c, d), and 2-jet (e, f) categories. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 10-d:
Observed and predicted distributions for the final discriminator D in the 8 TeV μμ (a, c, e) and ee (b, d, f) channels, and for the 0-jet high-pT (a, b), 1-jet high-pT (c, d), and 2-jet (e, f) categories. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 10-e:
Observed and predicted distributions for the final discriminator D in the 8 TeV μμ (a, c, e) and ee (b, d, f) channels, and for the 0-jet high-pT (a, b), 1-jet high-pT (c, d), and 2-jet (e, f) categories. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 10-f:
Observed and predicted distributions for the final discriminator D in the 8 TeV μμ (a, c, e) and ee (b, d, f) channels, and for the 0-jet high-pT (a, b), 1-jet high-pT (c, d), and 2-jet (e, f) categories. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 11:
Combined observed and predicted mττ distributions for the μτh, eτh, τhτh, and eμ channels. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction (μ=1). The distributions obtained in each category of each channel are weighted by the ratio between the expected signal and signal-plus-background yields in the category, obtained in the central mττ interval containing 68% of the signal events. The inset shows the corresponding difference between the observed data and expected background distributions, together with the signal distribution for a SM Higgs boson at mH = 125 GeV. The distribution from SM Higgs boson events in the WW decay channel does not significantly contribute to this plot.

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Figure 12:
Local p-value and significance in number of standard deviations as a function of the SM Higgs boson mass hypothesis for the LL channels. The observation (solid line) is compared to the expectation (dashed line) for a SM Higgs boson with mass mH. The background-only hypothesis includes the ppH(125 GeV)WW process for every value of mH.

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Figure 13-a:
Observed and predicted mvis distributions in the +τh channel in the low-LT (a) and high-LT (b) categories, each for the 8 TeV dataset, and in the +τhτh channel (c); observed and predicted mττ distributions in the +LL channel (d). The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction (μ=1). The signal and background histograms are stacked.

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Figure 13-b:
Observed and predicted mvis distributions in the +τh channel in the low-LT (a) and high-LT (b) categories, each for the 8 TeV dataset, and in the +τhτh channel (c); observed and predicted mττ distributions in the +LL channel (d). The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction (μ=1). The signal and background histograms are stacked.

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Figure 13-c:
Observed and predicted mvis distributions in the +τh channel in the low-LT (a) and high-LT (b) categories, each for the 8 TeV dataset, and in the +τhτh channel (c); observed and predicted mττ distributions in the +LL channel (d). The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction (μ=1). The signal and background histograms are stacked.

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Figure 13-d:
Observed and predicted mvis distributions in the +τh channel in the low-LT (a) and high-LT (b) categories, each for the 8 TeV dataset, and in the +τhτh channel (c); observed and predicted mττ distributions in the +LL channel (d). The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction (μ=1). The signal and background histograms are stacked.

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Figure 14-a:
Combined observed 95% CL upper limit on the signal strength parameter μ, together with the expected limit obtained in the background-only hypothesis (a), and the signal-plus-background hypothesis for a SM Higgs boson with mH = 125 GeV (b). The background-only hypothesis includes the ppH(125 GeV)WW process for every value of mH. The bands show the expected one- and two-standard-deviation probability intervals around the expected limit.

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Figure 14-b:
Combined observed 95% CL upper limit on the signal strength parameter μ, together with the expected limit obtained in the background-only hypothesis (a), and the signal-plus-background hypothesis for a SM Higgs boson with mH = 125 GeV (b). The background-only hypothesis includes the ppH(125 GeV)WW process for every value of mH. The bands show the expected one- and two-standard-deviation probability intervals around the expected limit.

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Figure 15:
Local p-value and significance in number of standard deviations as a function of the SM Higgs boson mass hypothesis for the combination of all decay channels. The observation (solid line) is compared to the expectation (dashed line) for a SM Higgs boson with mass mH. The background-only hypothesis includes the ppH(125 GeV)WW process for every value of mH.

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Figure 16-a:
Best-fit signal strength values, for independent channels (a) and categories (b), for mH = 125 GeV. The combined value for the Hττ analysis in both plots corresponds to ˆμ = 0.78 ± 0.27, obtained in the global fit combining all categories of all channels. The dashed line corresponds to the best-fit μ value. The contribution from the ppH(125 GeV)WW process is treated as background normalized to the SM expectation.

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Figure 16-b:
Best-fit signal strength values, for independent channels (a) and categories (b), for mH = 125 GeV. The combined value for the Hττ analysis in both plots corresponds to ˆμ = 0.78 ± 0.27, obtained in the global fit combining all categories of all channels. The dashed line corresponds to the best-fit μ value. The contribution from the ppH(125 GeV)WW process is treated as background normalized to the SM expectation.

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Figure 17:
Combined observed and predicted distributions of the decimal logarithm log(S/(S+B)) in each bin of the final mττ, mvis, or discriminator distributions obtained in all event categories and decay channels, with S/(S+B) denoting the ratio of the predicted signal and signal-plus-background event yields in each bin. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction (μ=1). The inset shows the corresponding difference between the observed data and expected background distributions, together with the signal distribution for a SM Higgs boson at mH = 125 GeV. The distribution from SM Higgs boson events in the WW decay channel does not significantly contribute to this plot.

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Figure 18-a:
Scan of the negative log-likelihood difference, 2ΔlnL, as a function of mH (a) and as a function of κV and κf (b). For each point, all nuisance parameters are profiled. For the likelihood scan as a function of mH, the background-only hypothesis includes the ppH(125 GeV)WW process for every value of mH. The observation (solid line) is compared to the expectation (dashed line) for a SM Higgs boson with mass mH = 125 GeV. For the likelihood scan as a function of κV and κf, the HWW contribution is treated as a signal process.

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Figure 18-b:
Scan of the negative log-likelihood difference, 2ΔlnL, as a function of mH (a) and as a function of κV and κf (b). For each point, all nuisance parameters are profiled. For the likelihood scan as a function of mH, the background-only hypothesis includes the ppH(125 GeV)WW process for every value of mH. The observation (solid line) is compared to the expectation (dashed line) for a SM Higgs boson with mass mH = 125 GeV. For the likelihood scan as a function of κV and κf, the HWW contribution is treated as a signal process.

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Figure 19-a:
Observed and predicted mττ distributions in the μτh channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 19-b:
Observed and predicted mττ distributions in the μτh channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 19-c:
Observed and predicted mττ distributions in the μτh channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 19-d:
Observed and predicted mττ distributions in the μτh channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 19-e:
Observed and predicted mττ distributions in the μτh channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 19-f:
Observed and predicted mττ distributions in the μτh channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 20-a:
Observed and predicted mττ distributions in the μτh channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 20-b:
Observed and predicted mττ distributions in the μτh channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 20-c:
Observed and predicted mττ distributions in the μτh channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 20-d:
Observed and predicted mττ distributions in the μτh channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 20-e:
Observed and predicted mττ distributions in the μτh channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 20-f:
Observed and predicted mττ distributions in the μτh channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 20-g:
Observed and predicted mττ distributions in the μτh channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 21-a:
Observed and predicted mττ distributions in the eτh channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 21-b:
Observed and predicted mττ distributions in the eτh channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 21-c:
Observed and predicted mττ distributions in the eτh channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 21-d:
Observed and predicted mττ distributions in the eτh channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 21-e:
Observed and predicted mττ distributions in the eτh channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 22-a:
Observed and predicted mττ distributions in the eτh channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 22-b:
Observed and predicted mττ distributions in the eτh channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 22-c:
Observed and predicted mττ distributions in the eτh channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 22-d:
Observed and predicted mττ distributions in the eτh channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 22-e:
Observed and predicted mττ distributions in the eτh channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 22-f:
Observed and predicted mττ distributions in the eτh channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 23-a:
Observed and predicted mττ distributions in the eμ channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 23-b:
Observed and predicted mττ distributions in the eμ channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 23-c:
Observed and predicted mττ distributions in the eμ channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 23-d:
Observed and predicted mττ distributions in the eμ channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 23-e:
Observed and predicted mττ distributions in the eμ channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 24-a:
Observed and predicted mττ distributions in the eμ channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 24-b:
Observed and predicted mττ distributions in the eμ channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 24-c:
Observed and predicted mττ distributions in the eμ channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 24-d:
Observed and predicted mττ distributions in the eμ channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 24-e:
Observed and predicted mττ distributions in the eμ channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 24-f:
Observed and predicted mττ distributions in the eμ channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 25-a:
Observed and predicted D distributions in the μμ channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 25-b:
Observed and predicted D distributions in the μμ channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 25-c:
Observed and predicted D distributions in the μμ channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 25-d:
Observed and predicted D distributions in the μμ channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 25-e:
Observed and predicted D distributions in the μμ channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 26-a:
Observed and predicted D distributions in the μμ channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 26-b:
Observed and predicted D distributions in the μμ channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 26-c:
Observed and predicted D distributions in the μμ channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 26-d:
Observed and predicted D distributions in the μμ channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 26-e:
Observed and predicted D distributions in the μμ channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 27-a:
Observed and predicted D distributions in the ee channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 27-b:
Observed and predicted D distributions in the ee channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 27-c:
Observed and predicted D distributions in the ee channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 27-d:
Observed and predicted D distributions in the ee channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 27-e:
Observed and predicted D distributions in the ee channel, for all categories used in the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 28-a:
Observed and predicted D distributions in the ee channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 28-b:
Observed and predicted D distributions in the ee channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 28-c:
Observed and predicted D distributions in the ee channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 28-d:
Observed and predicted D distributions in the ee channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 28-e:
Observed and predicted D distributions in the ee channel, for all categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The open signal histogram is shown superimposed to the background histograms, which are stacked.

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Figure 29-a:
Observed and predicted mvis distributions in the μ+μτh (a, c, e) and e+μτh/μ+eτh (b, d, f) channels for the 7 TeV data analysis (a, b) and in the low-LT (c, d) and high-LT (e, f) categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 29-b:
Observed and predicted mvis distributions in the μ+μτh (a, c, e) and e+μτh/μ+eτh (b, d, f) channels for the 7 TeV data analysis (a, b) and in the low-LT (c, d) and high-LT (e, f) categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 29-c:
Observed and predicted mvis distributions in the μ+μτh (a, c, e) and e+μτh/μ+eτh (b, d, f) channels for the 7 TeV data analysis (a, b) and in the low-LT (c, d) and high-LT (e, f) categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 29-d:
Observed and predicted mvis distributions in the μ+μτh (a, c, e) and e+μτh/μ+eτh (b, d, f) channels for the 7 TeV data analysis (a, b) and in the low-LT (c, d) and high-LT (e, f) categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 29-e:
Observed and predicted mvis distributions in the μ+μτh (a, c, e) and e+μτh/μ+eτh (b, d, f) channels for the 7 TeV data analysis (a, b) and in the low-LT (c, d) and high-LT (e, f) categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 29-f:
Observed and predicted mvis distributions in the μ+μτh (a, c, e) and e+μτh/μ+eτh (b, d, f) channels for the 7 TeV data analysis (a, b) and in the low-LT (c, d) and high-LT (e, f) categories used in the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 30-a:
Observed and predicted mvis distributions in the μ+τhτh (a, c) and e+τhτh (b, d) channels for the 7 TeV data analysis (a, b) and the 8 TeV data analysis (c, d). The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 30-b:
Observed and predicted mvis distributions in the μ+τhτh (a, c) and e+τhτh (b, d) channels for the 7 TeV data analysis (a, b) and the 8 TeV data analysis (c, d). The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 30-c:
Observed and predicted mvis distributions in the μ+τhτh (a, c) and e+τhτh (b, d) channels for the 7 TeV data analysis (a, b) and the 8 TeV data analysis (c, d). The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 30-d:
Observed and predicted mvis distributions in the μ+τhτh (a, c) and e+τhτh (b, d) channels for the 7 TeV data analysis (a, b) and the 8 TeV data analysis (c, d). The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 31-a:
Observed and predicted mττ distributions for the four different LL final states of the ee+LL (a) and μμ+LL (b) channels for the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 31-b:
Observed and predicted mττ distributions for the four different LL final states of the ee+LL (a) and μμ+LL (b) channels for the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 31-c:
Observed and predicted mττ distributions for the four different LL final states of the ee+LL (a) and μμ+LL (b) channels for the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 31-d:
Observed and predicted mττ distributions for the four different LL final states of the ee+LL (a) and μμ+LL (b) channels for the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 31-e:
Observed and predicted mττ distributions for the four different LL final states of the ee+LL (a) and μμ+LL (b) channels for the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 31-f:
Observed and predicted mττ distributions for the four different LL final states of the ee+LL (a) and μμ+LL (b) channels for the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 31-g:
Observed and predicted mττ distributions for the four different LL final states of the ee+LL (a) and μμ+LL (b) channels for the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 31-h:
Observed and predicted mττ distributions for the four different LL final states of the ee+LL (a) and μμ+LL (b) channels for the 7 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 32-a:
Observed and predicted mττ distributions for the four different LL final states of the ee+LL (a) and μμ+LL (b) channels for the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 32-b:
Observed and predicted mττ distributions for the four different LL final states of the ee+LL (a) and μμ+LL (b) channels for the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 32-c:
Observed and predicted mττ distributions for the four different LL final states of the ee+LL (a) and μμ+LL (b) channels for the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 32-d:
Observed and predicted mττ distributions for the four different LL final states of the ee+LL (a) and μμ+LL (b) channels for the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 32-e:
Observed and predicted mττ distributions for the four different LL final states of the ee+LL (a) and μμ+LL (b) channels for the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 32-f:
Observed and predicted mττ distributions for the four different LL final states of the ee+LL (a) and μμ+LL (b) channels for the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 32-g:
Observed and predicted mττ distributions for the four different LL final states of the ee+LL (a) and μμ+LL (b) channels for the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.

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Figure 32-h:
Observed and predicted mττ distributions for the four different LL final states of the ee+LL (a) and μμ+LL (b) channels for the 8 TeV data analysis. The normalization of the predicted background distributions corresponds to the result of the global fit. The signal distribution, on the other hand, is normalized to the SM prediction. The signal and background histograms are stacked.
Compact Muon Solenoid
LHC, CERN