Figure | Caption |
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Figure 1a : Diagram for the production of the heavier top-squark t ̃_{2} pairs, where t ̃_{2} → H t ̃_{1} and the lightest top squark subsequently decays t ̃_{1} → tχ ̃^{0}. The symbol * denotes charge conjugation. | |
Figure 1b : Diagram for the production of the heavier top-squark t ̃_{2} pairs, where t ̃_{2} → Z t ̃_{1} and the lightest top squark subsequently decays t ̃_{1} → tχ ̃^{0}. The symbol * denotes charge conjugation. | |
Figure 1c : Diagram for the production of the heavier top-squark t ̃_{2} pairs for the case of a mixed decay where one t ̃_{2} → H t ̃_{1} and the other t ̃_{2} → Z t ̃_{1}. In both cases, the lightest top squark subsequently decays t ̃_{1} → tχ ̃^{0}. The symbol * denotes charge conjugation. |
Table 1 summarizes the requirements that define the signal regions.
Caption | Table |
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Table 1 : Summary of the SR definitions for the different selections, specified by rows in the table. The SRs correspond to all possible combinations of requirements in each row, where different regions for the kinematic variables are separated by commas. There are 96 SRs in total. |
Tables 2,3, and 4 compare the event yields in the various Signal Regions with the event counts in the data. Figures 2, 3, and 4 show the main kinematic distributions used to define Signal Regions.
Caption | Table |
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Table 2 : Selection with one lepton or two OS leptons: background predictions and observed data yields. The uncertainties on the total background predictions include both the statistical and systematic components. | |
Table 3 : Same-sign dilepton selection: predicted total background and observed data yields as a function of the jet multiplicity, b-jet multiplicity, E_{T}^{miss}, and H_{T} requirements, for the low-p_{T} and high-p_{T} regions. The uncertainties in the total background predictions contain the statistical and systematic components. | |
Table 4 : Selection with at least three leptons: predicted total background and observed data yields as a function of the jet multiplicity, b-jet multiplicity, E_{T}^{miss}, and H_{T} requirements, for events with at least three leptons, with (on-Z) and without (off-Z) a Z boson candidate present. The uncertainties in the total background predictions include both the statistical and systematic components. |
Figure | Caption |
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Figure 2a : Selection with one lepton: Comparison of the m_{T} distributions for events with one lepton in data and MC simulation satisfying the 3b (left) and ≥ 4b (right) SR requirements. The vertical dashed lines indicate the corresponding signal region requirement. The semileptonic tt and dileptonic tt components represent simulated events characterized by the presence of one or two W bosons decaying to e, μ or τ. The yields of the tt simulated samples are adjusted so that the total SM prediction is normalized to the data in the samples obtained by inverting the SR requirements. The distribution for the model t ̃_{2} → H t ̃_{1} where m(t ̃_{2})=450 GeV and m(t ̃_{1})=200 GeV is displayed on top of the backgrounds. The last bin contains the overflow events. The uncertainties in the background predictions are derived for the total yields in the signal regions and are listed in Table 2. | |
Figure 2b : Selection with two OS leptons: Comparison of the m_{bb} distributions for events with two OS leptons in data and MC simulation satisfying the 3b (left) and ≥ 4b (right) SR requirements. The vertical dashed lines indicate the corresponding signal region requirement. The semileptonic tt and dileptonic tt components represent simulated events characterized by the presence of one or two W bosons decaying to e, μ or τ. The yields of the tt simulated samples are adjusted so that the total SM prediction is normalized to the data in the samples obtained by inverting the SR requirements. The distribution for the model t ̃_{2} → H t ̃_{1} where m(t ̃_{2})=450 GeV and m(t ̃_{1})=200 GeV is displayed on top of the backgrounds. The last bin contains the overflow events. The uncertainties in the background predictions are derived for the total yields in the signal regions and are listed in Table 2. | |
Figure 3a: Selection with two SS leptons (high-p_{T} analysis): Data and predicted SM background for the event sample with two SS leptons as a function of number of b jets, number of jets, and E_{T}^{miss} for events satisfying the high-p_{T} selection. The shaded bands correspond to the total estimated uncertainty in the background prediction. The distribution for the model t ̃_{2} → H t ̃_{1} where m(t ̃_{2})=400 GeV and m(t ̃_{1})=200 GeV is displayed on top of the backgrounds. The last bin in the histograms includes overflow events. | |
Figure 3b : Selection with two SS leptons (low-p_{T} analysis): Data and predicted SM background for the event sample with two SS leptons as a function of number of b jets, number of jets, and E_{T}^{miss} for events satisfying the low-p_{T} selection. The shaded bands correspond to the total estimated uncertainty in the background prediction. The distribution for the model t ̃_{2} → H t ̃_{1} where m(t ̃_{2})=400 GeV and m(t ̃_{1})=200 GeV is displayed on top of the backgrounds. The last bin in the histograms includes overflow events. | |
Figure 4a : Selection with at least three leptons (off-Z analysis): Data and predicted SM background for the event sample with at least three leptons as a function of number of b jets, number of jets, and E_{T}^{miss} for events that do not contain (off-Z) an OS same-flavor pair that is a Z boson candidate. The shaded bands correspond to the total estimated uncertainty in the background prediction. The distribution for the model t ̃_{2} → H t ̃_{1} where m(t ̃_{2})=450 GeV and m(t ̃_{1})=200 GeV is displayed on top of the backgrounds. The last bin in the histograms includes overflow events. | |
Figure 4b : Selection with at least three leptons (on-Z analysis): Data and predicted SM background for the event sample with at least three leptons as a function of number of b jets, number of jets, and E_{T}^{miss} for events that contain (on-Z) an OS same-flavor pair that is a Z boson candidate. The shaded bands correspond to the total estimated uncertainty in the background prediction. The distribution for the model t ̃_{2} → Z t ̃_{1} where m(t ̃_{2})=600 GeV and m(t ̃_{1})=200 GeV is displayed on top of the backgrounds. The last bin in the histograms includes overflow events. |
Table 5 shows the breakdown of the systematic uncertainties on the signal.
Caption | Table |
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Table 5 : Relative systematic uncertainties (in percent) in the signal yields for the different event selections: one lepton (1 l), two OS leptons (2 OS l), two SS leptons (2 SS l), and at least three leptons (≥3l). The range indicates the variation in the systematic uncertainty for the different decay channels and SRs considered. |
Figures 5 (a)-(b) show the limits in the m( t ̃_{1}) vs. m( t ̃_{2}) plane. These limits are obtained using models where m(t ̃_{1}) - m(χ ̃^{0}) = 175 GeV. Figure 6 shows how the limits of Figure 5 would change under different branching fraction assumptions.
Figure | Caption |
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Figure 5a (left) : Interpretation of the results in SUSY simplified model parameter space, m(t ̃_{1}) vs. m(t ̃_{2}), with the neutralino mass constrained by the relation m(t ̃_{1}) - m(χ ̃^{0}) = 175 GeV. The shaded map shows the upper limit (95% CL) on the cross section times branching fraction at each point in the m(t ̃_{1}) vs. m(t ̃_{2}) plane for the process pp → t ̃_{2}t ̃_{2}^{*}, with t ̃_{2} → H t ̃_{1} and t ̃_{1} → tχ ̃^{0}. In this plot, the results from all channels are combined. The excluded region in the m(t ̃_{1}) vs. m(t ̃_{2}) parameter space is obtained by comparing the cross section times branching fraction upper limit at each model point with the corresponding NLO+NLL cross section for the process, assuming that B(t ̃_{2} → H t ̃_{1}) = 100%. The solid (dashed) curves define the boundary of the observed (expected) excluded region. The ±1 standard deviation (σ) bands are indicated by the finer contours. The cross section limits are available in electronic format here: tarred file. |
Figure 5a (right) : Interpretation of the results in SUSY simplified model parameter space, m(t ̃_{1}) vs. m(t ̃_{2}), with the neutralino mass constrained by the relation m(t ̃_{1}) - m(χ ̃^{0}) = 175 GeV. The figure shows the observed (expected) exclusion contours, which are indicated by the solid (dashed) curves for the contributing channels. The excluded region in the m(t ̃_{1}) vs. m(t ̃_{2}) parameter space is obtained by comparing the cross section times branching fraction upper limit at each model point with the corresponding NLO+NLL cross section for the process, assuming that B(t ̃_{2} → H t ̃_{1}) = 100%. As indicated in the legends, the thinner curves show the results from each of the contributing channels, while the thicker curve shows their combination. The four event categories for the t ̃_{2} → H t ̃_{1} study are shown. The cross section limits are available in electronic format here: tarred file. | |
Figure 5b (left) : Interpretation of the results in SUSY simplified model parameter space, m(t ̃_{1}) vs. m(t ̃_{2}), with the neutralino mass constrained by the relation m(t ̃_{1}) - m(χ ̃^{0}) = 175 GeV. The shaded map shows the upper limit (95% CL) on the cross section times branching fraction at each point in the m(t ̃_{1}) vs. m(t ̃_{2}) plane for the process pp → t ̃_{2}t ̃_{2}^{*}, with t ̃_{2} → Z t ̃_{1} and t ̃_{1} → tχ ̃^{0}. In this plot, the results from all channels are combined. The excluded region in the m(t ̃_{1}) vs. m(t ̃_{2}) parameter space is obtained by comparing the cross section times branching fraction upper limit at each model point with the corresponding NLO+NLL cross section for the process, assuming that B(t ̃_{2} → Z t ̃_{1}) = 100%. The solid (dashed) curves define the boundary of the observed (expected) excluded region. The ±1 standard deviation (σ) bands are indicated by the finer contours. The cross section limits are available in electronic format here: tarred file. | |
Figure 5b (right) : Interpretation of the results in SUSY simplified model parameter space, m(t ̃_{1}) vs. m(t ̃_{2}), with the neutralino mass constrained by the relation m(t ̃_{1}) - m(χ ̃^{0}) = 175 GeV. The on-Z and off-Z categories for events with at least three leptons are shown. The figure shows the observed (expected) exclusion contours, which are indicated by the solid (dashed) curves for the contributing channels. The excluded region in the m(t ̃_{1}) vs. m(t ̃_{2}) parameter space is obtained by comparing the cross section times branching fraction upper limit at each model point with the corresponding NLO+NLL cross section for the process, assuming that B(t ̃_{2} → Z t ̃_{1}) = 100%. As indicated in the legends, the thinner curves show the results from each of the contributing channels, while the thicker curve shows their combination. The cross section limits are available in electronic format here: tarred file. | |
Figure 6 : Upper limits on the cross section for t ̃_{2} pair production for different branching fractions of t ̃_{2} → H t ̃_{1} and t ̃_{2} → Z t ̃_{1}, assuming that B(t ̃_{2} → H t ̃_{1}) + B(t ̃_{2} → Z t ̃_{1}) = 100%. The t ̃_{1} squark is assumed to always decay to a top quark and a neutralino χ ̃^{0} with m(t ̃_{1}) - m(χ ̃^{0}) = m(t). The decay t ̃_{2} → H t ̃_{1} is only considered when the H boson production is kinematically allowed, m(t ̃_{1}) - m(t ̃_{2}) > m(H). The cross section limits are available in electronic format here: tarred file. |
Additional tables 6-8 show the signal region naming convention.
Caption | Table |
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Additional Table 1 : Selection with one lepton or two OS leptons: Summary of the signal region definitions. | |
Additional Table 2 : Selection with two SS leptons: Summary of the signal region definitions for the high-p_{T} selection. The definitions for the low-p_{T} selection is the same except that the lower H_{T} bin is defined as 250 GeV < H_{T} < 400 GeV. The signal regions without a b tag are not included in this analysis, but are listed to indicate the numbering convention which follows that of the separate publication for the analysis with two SS leptons (see this link here). | |
Additional Table 3 : Selection with at least three leptons: Summary of the signal region definitions for the selection. Signal regions 30-59 are the same as 0-29 except that the off-Z dilepton mass requirement is inverted. |
Caption | Table |
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Additional Table 4 : Selection with one lepton or two OS leptons: Background predictions and data counts indicating the separate background contributions with the statistical uncertainty only. The uncertainties on the total background predictions contain the statistical and systematic components. |
Caption | Table |
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Additional Table 5 : Selection with two SS leptons (high-p_{T} analysis): Background predictions and data counts indicating the separate background contributions with the total uncertainty. Machine-readable files are available: 2lSS_highPT.txt. | |
Additional Table 6 : Selection with two SS leptons (low-p_{T} analysis): Background predictions and data counts indicating the separate background contributions with the total uncertainty. Machine-readable files are available: 2lSS_lowPT.txt. |
Caption | Table |
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Additional Table 7 : Selection with at least three leptons (off-Z analysis): Background predictions and data counts indicating the separate background contributions with the total uncertainty. Machine-readable files are available: 3l_offZ.txt. | |
Additional Table 8 : Selection with at least three leptons (on-Z analysis): Background predictions and data counts indicating the separate background contributions with the total uncertainty. Machine-readable files are available: 3l_onZ.txt. |
The following plots show the signal region with the best expected sensitivity for each of the signal models considered.
Figure | Caption |
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Additional Figure 1 : Selection with one lepton or two OS leptons: Most sensitive search region in the t ̃_{2} → H t ̃_{1} model based on the expected upper limit. | |
Additional Figure 2 : Selection with two high pt SS leptons: Most sensitive search region in the t ̃_{2} → H t ̃_{1} model based on the expected upper limit. | |
Additional Figure 3 : Selection with at least three leptons: Most sensitive search region in the t ̃_{2} → H t ̃_{1} model based on the expected upper limit. |
Figure | Caption |
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Additional Figure 4 : Selection with one lepton or two OS leptons: Most sensitive search region in the t ̃_{2} → Z t ̃_{1} model based on the expected upper limit. | |
Additional Figure 5 : Selection with two SS leptons: Most sensitive search region in the t ̃_{2} → Z t ̃_{1} model based on the expected upper limit. To facilitate the comparison between high and low pt seach regions, the low pt search got an extra 100 added to their search region number. | |
Additional Figure 6 : Selection with at least three leptons: Most sensitive search region in the t ̃_{2} → Z t ̃_{1} model based on the expected upper limit. |
Figure | Caption |
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Additional Figure 7 : Selection with one lepton or two OS leptons: Most sensitive search region in the t ̃_{2} → H/Z t ̃_{1} model based on the expected upper limit. | |
Additional Figure 8 : Selection with two SS leptons: Most sensitive search region in the t ̃_{2} → H/Z t ̃_{1} model based on the expected upper limit. To facilitate the comparison between high and low pt seach regions, the low pt search got an extra 100 added to their search region number. | |
Additional Figure 9 : Selection with at least three leptons: Most sensitive search region in the t ̃_{2} → H/Z t ̃_{1} model based on the expected upper limit. |
Figure | Caption |
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Additional Figure 10 : Selection with one lepton or two OS leptons: The distributions show the 95% CL upper limits (UL) on the cross section times branching fraction of t ̃2 pair production in the decay mode t ̃2 → H t ̃1 in the plane of m(t ̃1) versus m(t ̃2) assuming NLO+NLL cross section. The t ̃1 is decayed to top plus neutralino assuming m(t ̃1) - m(χ ̃0) = m(t). A branching fraction of unity is assumed for each decay mode. The black (red) curves indicate the observed (expected) exclusion contours. The ±1 standard deviation (σ) bands are indicated by the finer contours. | |
Additional Figure 11 : Selection with two SS leptons: The distributions show the 95% CL upper limits (UL) on the cross section times branching fraction of t ̃2 pair production in the decay mode t ̃2 → H t ̃1 in the plane of m(t ̃1) versus m(t ̃2) assuming NLO+NLL cross section. The t ̃1 is decayed to top plus neutralino assuming m(t ̃1) - m(χ ̃0) = m(t). A branching fraction of unity is assumed for each decay mode. The black (red) curves indicate the observed (expected) exclusion contours. The ±1 standard deviation (σ) bands are indicated by the finer contours. | |
Additional Figure 12 : Selection with at least three leptons: The distributions show the 95% CL upper limits (UL) on the cross section times branching fraction of t ̃2 pair production in the decay mode t ̃2 → H t ̃1 in the plane of m(t ̃1) versus m(t ̃2) assuming NLO+NLL cross section. The t ̃1 is decayed to top plus neutralino assuming m(t ̃1) - m(χ ̃0) = m(t). A branching fraction of unity is assumed for each decay mode. The black (red) curves indicate the observed (expected) exclusion contours. The ±1 standard deviation (σ) bands are indicated by the finer contours. | |
Additional Figure 13 : The distributions show the observed (expected) exclusion contours indicated by the solid (dashed) curves for the contributing analyses for the different decay modes and the combination in the t ̃_{2} → H t ̃_{1} model. |
Figure | Caption |
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Additional Figure 14 : Selection with one lepton or two OS leptons: The distributions show the 95% CL upper limits (UL) on the cross section times branching fraction of t ̃2 pair production in the decay mode t ̃2 → Z t ̃1 in the plane of m(t ̃1) versus m(t ̃2) assuming NLO+NLL cross section. The t ̃1 is decayed to top plus neutralino assuming m(t ̃1) - m(χ ̃0) = m(t). A branching fraction of unity is assumed for each decay mode. The black (red) curves indicate the observed (expected) exclusion contours. The ±1 standard deviation (σ) bands are indicated by the finer contours. | |
Additional Figure 15 : Selection with two SS leptons (high-p_{T} analysis): The distributions show the 95% CL upper limits (UL) on the cross section times branching fraction of t ̃2 pair production in the decay mode t ̃2 → Z t ̃1 in the plane of m(t ̃1) versus m(t ̃2) assuming NLO+NLL cross section. The t ̃1 is decayed to top plus neutralino assuming m(t ̃1) - m(χ ̃0) = m(t). A branching fraction of unity is assumed for each decay mode. The black (red) curves indicate the observed (expected) exclusion contours. The ±1 standard deviation (σ) bands are indicated by the finer contours. | |
Additional Figure 16 : Selection with two SS leptons (low-p_{T} analysis): The distributions show the 95% CL upper limits (UL) on the cross section times branching fraction of t ̃2 pair production in the decay mode t ̃2 → Z t ̃1 in the plane of m(t ̃1) versus m(t ̃2) assuming NLO+NLL cross section. The t ̃1 is decayed to top plus neutralino assuming m(t ̃1) - m(χ ̃0) = m(t). A branching fraction of unity is assumed for each decay mode. The black (red) curves indicate the observed (expected) exclusion contours. The ±1 standard deviation (σ) bands are indicated by the finer contours. | |
Additional Figure 17 : Selection with at least three leptons (on-Z analysis): The distributions show the 95% CL upper limits (UL) on the cross section times branching fraction of t ̃2 pair production in the decay mode t ̃2 → Z t ̃1 in the plane of m(t ̃1) versus m(t ̃2) assuming NLO+NLL cross section. The t ̃1 is decayed to top plus neutralino assuming m(t ̃1) - m(χ ̃0) = m(t). A branching fraction of unity is assumed for each decay mode. The black (red) curves indicate the observed (expected) exclusion contours. The ±1 standard deviation (σ) bands are indicated by the finer contours. | |
Additional Figure 18 : Selection with at least three leptons (off-Z analysis): The distributions show the 95% CL upper limits (UL) on the cross section times branching fraction of t ̃2 pair production in the decay mode t ̃2 → Z t ̃1 in the plane of m(t ̃1) versus m(t ̃2) assuming NLO+NLL cross section. The t ̃1 is decayed to top plus neutralino assuming m(t ̃1) - m(χ ̃0) = m(t). A branching fraction of unity is assumed for each decay mode. The black (red) curves indicate the observed (expected) exclusion contours. The ±1 standard deviation (σ) bands are indicated by the finer contours. | |
Additional Figure 19 : Selection with at least three leptons: The distributions show the 95% CL upper limits (UL) on the cross section times branching fraction of t ̃2 pair production in the decay mode t ̃2 → Z t ̃1 in the plane of m(t ̃1) versus m(t ̃2) assuming NLO+NLL cross section. The t ̃1 is decayed to top plus neutralino assuming m(t ̃1) - m(χ ̃0) = m(t). A branching fraction of unity is assumed for each decay mode. The black (red) curves indicate the observed (expected) exclusion contours. The ±1 standard deviation (σ) bands are indicated by the finer contours. | |
Additional Figure 20 : The distributions show the observed (expected) exclusion contours indicated by the solid (dashed) curves for the contributing analyses for the different decay modes and the combination in the t ̃_{2} → Z t ̃_{1} model. |
Figure | Caption |
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Additional Figure 21 : Selection with one lepton or two OS leptons: The distributions show the 95% CL upper limits (UL) on the cross section times branching fraction of t ̃2 pair production in the T6ttHZ simplified model in the plane of m(t ̃1) versus m(t ̃2) assuming NLO+NLL cross section. The t ̃1 is decayed to top plus neutralino assuming m(t ̃1) - m(χ ̃0) = m(t). A branching fraction of unity is assumed for each decay mode. The black (red) curves indicate the observed (expected) exclusion contours. The ±1 standard deviation (σ) bands are indicated by the finer contours. | |
Additional Figure 22 : Selection with two SS leptons (high-p_{T} analysis): The distributions show the 95% CL upper limits (UL) on the cross section times branching fraction of t ̃2 pair production in the T6ttHZ simplified model in the plane of m(t ̃1) versus m(t ̃2) assuming NLO+NLL cross section. The t ̃1 is decayed to top plus neutralino assuming m(t ̃1) - m(χ ̃0) = m(t). A branching fraction of unity is assumed for each decay mode. The black (red) curves indicate the observed (expected) exclusion contours. The ±1 standard deviation (σ) bands are indicated by the finer contours. | |
Additional Figure 23 : Selection with two SS leptons (low-p_{T} analysis): The distributions show the 95% CL upper limits (UL) on the cross section times branching fraction of t ̃2 pair production in T6ttHZ simplified model in the plane of m(t ̃1) versus m(t ̃2) assuming NLO+NLL cross section. The t ̃1 is decayed to top plus neutralino assuming m(t ̃1) - m(χ ̃0) = m(t). A branching fraction of unity is assumed for each decay mode. The black (red) curves indicate the observed (expected) exclusion contours. The ±1 standard deviation (σ) bands are indicated by the finer contours. | |
Additional Figure 24 : Selection with at least three leptons (on-Z analysis): The distributions show the 95% CL upper limits (UL) on the cross section times branching fraction of t ̃2 pair production T6ttHZ simplified model in the plane of m(t ̃1) versus m(t ̃2) assuming NLO+NLL cross section. The t ̃1 is decayed to top plus neutralino assuming m(t ̃1) - m(χ ̃0) = m(t). A branching fraction of unity is assumed for each decay mode. The black (red) curves indicate the observed (expected) exclusion contours. The ±1 standard deviation (σ) bands are indicated by the finer contours. | |
Additional Figure 25 : Selection with at least three leptons (off-Z analysis): The distributions show the 95% CL upper limits (UL) on the cross section times branching fraction of t ̃2 pair production in T6ttHZ simplified model in the plane of m(t ̃1) versus m(t ̃2) assuming NLO+NLL cross section. The t ̃1 is decayed to top plus neutralino assuming m(t ̃1) - m(χ ̃0) = m(t). A branching fraction of unity is assumed for each decay mode. The black (red) curves indicate the observed (expected) exclusion contours. The ±1 standard deviation (σ) bands are indicated by the finer contours. | |
Additional Figure 26 : Selection with at least three leptons: The distributions show the 95% CL upper limits (UL) on the cross section times branching fraction of t ̃2 pair production in T6ttHZ simplified model in the plane of m(t ̃1) versus m(t ̃2) assuming NLO+NLL cross section. The t ̃1 is decayed to top plus neutralino assuming m(t ̃1) - m(χ ̃0) = m(t). A branching fraction of unity is assumed for each decay mode. The black (red) curves indicate the observed (expected) exclusion contours. The ±1 standard deviation (σ) bands are indicated by the finer contours. | |
Additional Figure 27 : The distributions show the observed (expected) exclusion contours indicated by the solid (dashed) curves for the contributing analyses for the different decay modes and the combination in the t ̃_{2} → H/Z t ̃_{1} model. |
Additional Figure 28 : Plots as in Fig. 2 (top). | ||
Additional Figure 29 : Plots as in Fig. 2 (bottom). |
Figures 5 (a)-(b) show the limits in the m( t ̃_{1}) vs. m( t ̃_{2}) plane. These limits are obtained using models where m(t ̃_{1}) - m(χ ̃^{0}) = 175 GeV. The difference with the plots in the paper is in the axis ranges which is set to be the same throughout all plots here.
Figure | Caption |
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Figure 5a (left) : Interpretation of the results in SUSY simplified model parameter space, m(t ̃_{1}) vs. m(t ̃_{2}), with the neutralino mass constrained by the relation m(t ̃_{1}) - m(χ ̃^{0}) = 175 GeV. The shaded map shows the upper limit (95% CL) on the cross section times branching fraction at each point in the m(t ̃_{1}) vs. m(t ̃_{2}) plane for the process pp → t ̃_{2}t ̃_{2}^{*}, with t ̃_{2} → H t ̃_{1} and t ̃_{1} → tχ ̃^{0}. In this plot, the results from all channels are combined. The excluded region in the m(t ̃_{1}) vs. m(t ̃_{2}) parameter space is obtained by comparing the cross section times branching fraction upper limit at each model point with the corresponding NLO+NLL cross section for the process, assuming that B(t ̃_{2} → H t ̃_{1}) = 100%. The solid (dashed) curves define the boundary of the observed (expected) excluded region. The ±1 standard deviation (σ) bands are indicated by the finer contours. The cross section limits are available in electronic format here: tarred file. |
Figure 5a (right) : Interpretation of the results in SUSY simplified model parameter space, m(t ̃_{1}) vs. m(t ̃_{2}), with the neutralino mass constrained by the relation m(t ̃_{1}) - m(χ ̃^{0}) = 175 GeV. The figure shows the observed (expected) exclusion contours, which are indicated by the solid (dashed) curves for the contributing channels. The excluded region in the m(t ̃_{1}) vs. m(t ̃_{2}) parameter space is obtained by comparing the cross section times branching fraction upper limit at each model point with the corresponding NLO+NLL cross section for the process, assuming that B(t ̃_{2} → H t ̃_{1}) = 100%. As indicated in the legends, the thinner curves show the results from each of the contributing channels, while the thicker curve shows their combination. The four event categories for the t ̃_{2} → H t ̃_{1} study are shown. The cross section limits are available in electronic format here: tarred file. | |
Figure 5b (left) : Interpretation of the results in SUSY simplified model parameter space, m(t ̃_{1}) vs. m(t ̃_{2}), with the neutralino mass constrained by the relation m(t ̃_{1}) - m(χ ̃^{0}) = 175 GeV. The shaded map shows the upper limit (95% CL) on the cross section times branching fraction at each point in the m(t ̃_{1}) vs. m(t ̃_{2}) plane for the process pp → t ̃_{2}t ̃_{2}^{*}, with t ̃_{2} → Z t ̃_{1} and t ̃_{1} → tχ ̃^{0}. In this plot, the results from all channels are combined. The excluded region in the m(t ̃_{1}) vs. m(t ̃_{2}) parameter space is obtained by comparing the cross section times branching fraction upper limit at each model point with the corresponding NLO+NLL cross section for the process, assuming that B(t ̃_{2} → Z t ̃_{1}) = 100%. The solid (dashed) curves define the boundary of the observed (expected) excluded region. The ±1 standard deviation (σ) bands are indicated by the finer contours. The cross section limits are available in electronic format here: tarred file. | |
Figure 5b (right) : Interpretation of the results in SUSY simplified model parameter space, m(t ̃_{1}) vs. m(t ̃_{2}), with the neutralino mass constrained by the relation m(t ̃_{1}) - m(χ ̃^{0}) = 175 GeV. The figure shows the observed (expected) exclusion contours, which are indicated by the solid (dashed) curves for the contributing channels. The excluded region in the m(t ̃_{1}) vs. m(t ̃_{2}) parameter space is obtained by comparing the cross section times branching fraction upper limit at each model point with the corresponding NLO+NLL cross section for the process, assuming that B(t ̃_{2} → Z t ̃_{1}) = 100%. As indicated in the legends, the thinner curves show the results from each of the contributing channels, while the thicker curve shows their combination. The on-Z and off-Z categories for events with at least three leptons are shown. The cross section limits are available in electronic format here: tarred file. |
-- VerenaMartinez - 21 Jan 2014