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<!-- * Set CDS = http://cdsweb.cern.ch/record/1376643?ln=en --> ---+ Combination of Higgs Searches (Lepton Photon 2011) This is a condensed description with plots for the analysis [[http://cdsweb.cern.ch/record/1376643?ln=en][LINK TO CDS]] ---++ Abstract <div style="max-width: 66em;"> The overall combination is presented of eight standard model (SM) Higgs boson searches performed by the CMS Collaboration using the following Higgs boson decay signatures: <nobr>H → γγ</nobr>, <nobr>H → ττ</nobr>, <nobr>H → bb</nobr>, <nobr>H → WW → 2l2ν</nobr>, <nobr>H → ZZ → 4l</nobr>, <nobr>H → ZZ → 2l2τ</nobr>, <nobr>H → ZZ → 2l2ν</nobr>, and <nobr>H → ZZ → 2l2q</nobr>. Depending on the analysis, the amount of data used corresponds to 1.1-1.7 fb<sup>−1</sup> of integrated luminosity. The SM Higgs boson is excluded at 95% C.L. in three mass ranges 145-216, 226-288, and 310-400 !GeV/c². The expected exclusion in the absence of a signal is 130-440 !GeV/c². The largest excursion of the observed data from the expected has a probability of 0.4 after taking into account the look-elsewhere effect. At 90% C.L., we exclude the SM Higgs boson in the continuous mass range from 144-440 !GeV/c². The reported limits were obtained using the modified frequentist construction known as the CLs method. </div> ---++ Plots <div style="max-width: 99em;"> | *Figure set* | *Description* | *Variants* | | <!-- ========================================================================================================================================== --> \ <img src="http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/smcls_comb_logx.png" height="300" /> \ | *The CLs value for the standard model Higgs hypothesis as a function of the Higgs \ boson mass in the range 110-600 !GeV/c²*. %BR% The observed values are shown by a solid line. The \ dashed black line indicates the median expected CLs value for the background-only hypothesis, \ while the green/yellow bands indicate the ranges that are expected to contain 68%/95% of all \ observed limit excursions from the median. The three red horizontal lines show confidence \ levels of 90%, 95%, and 99% defined as (1 - CLs). \ | linear x ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/smcls_comb.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/smcls_comb.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/smcls_comb.pdf][pdf]])%BR% \ log x ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/smcls_comb_logx.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/smcls_comb_logx.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/smcls_comb_logx.pdf][pdf]])%BR% \ low mass ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/smcls_comb_zoom.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/smcls_comb_zoom.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/smcls_comb_zoom.pdf][pdf]]) | | <!-- ========================================================================================================================================== --> \ <img src="http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_comb_logx.png" height="300" /> \ | *The combined 95% C.L. upper limits on the signal strength modifier <nobr>μ = σ/σ<sub>SM</sub></nobr>, \ as a function of the SM Higgs boson mass in the range 110-600 !GeV/c²*. %BR% The observed limits \ are shown by the solid symbols and the black line. The dashed line indicates the median \ expected limit on m for the background-only hypothesis, while the green/yellow bands indicate \ the ranges that are expected to contain 68%/95% of all observed limit excursions from the \ median. \ | linear x ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_comb.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_comb.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_comb.pdf][pdf]])%BR% \ log x ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_comb_logx.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_comb_logx.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_comb_logx.pdf][pdf]])%BR% \ low mass ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_comb_zoom.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_comb_zoom.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_comb_zoom.pdf][pdf]]) | | <!-- ========================================================================================================================================== --> \ <img src="http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/lte_cls_comb_logx.png" height="300" /> \ | *The combined 95% C.L. upper limits on the signal strength modifier <nobr>μ = σ/σ<sub>SM</sub></nobr>, \ as a function of the SM Higgs boson mass in the range 110-600 !GeV/c²*. %BR% The observed limits \ are shown by the solid symbols and the black line. The dashed line indicates the median \ expected limit on m for the background-only hypothesis, while the green/yellow bands indicate \ the ranges that are expected to contain 68%/95% of all observed limit excursions from the \ median. The mass ranges excluded by LEP, by Tevatron and by this result are shown as hatched areas. \ | linear x ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/lte_cls_comb.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/lte_cls_comb.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/lte_cls_comb.pdf][pdf]])%BR% \ log x ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/lte_cls_comb_logx.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/lte_cls_comb_logx.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/lte_cls_comb_logx.pdf][pdf]])%BR% \ low mass ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/lte_cls_comb_zoom.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/lte_cls_comb_zoom.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/lte_cls_comb_zoom.pdf][pdf]]) | | <!-- ========================================================================================================================================== --> \ <img src="http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/CMS_LP11_vs_TEV_EPS11.png" height="300" /> \ | *The combined 95% C.L. upper limits on the signal strength modifier <nobr>μ = σ/σ<sub>SM</sub></nobr>, \ as a function of the SM Higgs boson mass in the range 110-600 !GeV/c²*. %BR% The observed limits \ are shown by the solid symbols and the black line. The dashed line indicates the median \ expected limit on m for the background-only hypothesis, while the green/yellow bands indicate \ the ranges that are expected to contain 68%/95% of all observed limit excursions from the \ median. The Tevatron observed and expected limits are also shown. \ | [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/CMS_LP11_vs_TEV_EPS11.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/CMS_LP11_vs_TEV_EPS11.pdf][pdf]] | | <!-- ========================================================================================================================================== --> \ <img src="http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all2_logx.png" height="300" /> \ | *The 95% C.L. upper limits on the signal strength modifier <nobr>μ = σ/σ<sub>SM</sub></nobr> \ as a function of the SM Higgs boson mass in the range 110-600 !GeV/c² for the eight major \ analyses and their combination*. %BR% The limits are obtained with the CLs method. The solid lines \ show the observed limits, while the dashed lines indicate the median expected assuming the \ _background-only_ hypothesis. \ | linear x ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all2.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all2.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all2.pdf][pdf]])%BR% \ log x ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all2_logx.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all2_logx.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all2_logx.pdf][pdf]])%BR% \ low mass ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all2_zoom.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all2_zoom.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all2_zoom.pdf][pdf]]) | | <!-- ========================================================================================================================================== --> \ <img src="http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all_logx.png" height="300" /> \ | *The observed 95% C.L. upper limits on the signal strength modifier <nobr>μ = σ/σ<sub>SM</sub></nobr> \ as a function of the SM Higgs boson mass in the range 110-600 !GeV/c² for the eight major \ analyses and their combination*. %BR% The limits are obtained with the CLs method. \ | linear x ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all.pdf][pdf]])%BR% \ log x ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all_logx.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all_logx.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all_logx.pdf][pdf]])%BR% \ low mass ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all_zoom.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all_zoom.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_all_zoom.pdf][pdf]]) | | <!-- ========================================================================================================================================== --> \ <img src="http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_allexp_logx.png" height="300" /> \ | *The expected 95% C.L. upper limits on the signal strength modifier <nobr>μ = σ/σ<sub>SM</sub></nobr> \ as a function of the SM Higgs boson mass in the range 110-600 !GeV/c² for the eight major \ analyses and their combination*. %BR% The limits are obtained with the CLs method. \ | linear x ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_allexp.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_allexp.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_allexp.pdf][pdf]])%BR% \ log x ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_allexp_logx.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_allexp_logx.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_allexp_logx.pdf][pdf]])%BR% \ low mass ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_allexp_zoom.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_allexp_zoom.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_allexp_zoom.pdf][pdf]]) | | <!-- ========================================================================================================================================== --> \ <img src="http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pval_ml_comb_liny.png" height="300" /> \ | *The _local_ <i>p</i>-values (top) and observed best-fit signal strength <nobr>μ̂ = σ/σ<sub>SM</sub></nobr> (bottom) \ vs Higgs boson mass.* %BR% The <i>p</i>-value is an estimated probability of upward background fluctuations \ as high or higher than the excesses observed in data. After taking into account the \ look-elsewhere effect (see text), the probability to see an excess at least as large as the one observed \ in data is ∼0.4. The μ̂ value indicates by what factor the SM Higgs cross section would \ have to be rescaled to best match the observed data. \ | linear y ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pval_ml_comb_liny.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pval_ml_comb_liny.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pval_ml_comb_liny.pdf][pdf]]) %BR% \ log y ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pval_ml_comb.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pval_ml_comb.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pval_ml_comb.pdf][pdf]]) %BR% \ low mass linear y ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pval_ml_comb_zoom_liny.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pval_ml_comb_zoom_liny.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pval_ml_comb_zoom_liny.pdf][pdf]]) %BR% \ low mass log y ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pval_ml_comb_zoom.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pval_ml_comb_zoom.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pval_ml_comb_zoom.pdf][pdf]]) | | <!-- ========================================================================================================================================== --> \ <img src="http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pvala_all_zoom.png" height="300" /> \ | *The overall combined _local_ <i>p</i>-values (solid black line) and contributions of individual \ channels entering the combination vs. Higgs boson mass.* %BR% The <i>p</i>-valuee is an estimated probability \ of upward background fluctuation as high or higher than the excesses observed in data. \ After taking into account the look-elsewhere effect (see text), the probability to see an excess at \ least as large as the one observed in data is ∼0.4. \ | linear x ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pvala_all.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pvala_all.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pvala_all.pdf][pdf]])%BR% \ log x ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pvala_all_logx.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pvala_all_logx.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pvala_all_logx.pdf][pdf]])%BR% \ low mass ([[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pvala_all_zoom.png][png]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pvala_all_zoom.eps][eps]], [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pvala_all_zoom.pdf][pdf]]) | </div> ---++ Tables The following tables are also available as individual files in text format: * [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/smcls_comb.txt][CLs of SM Higgs Hypothesis]] * [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/cls_comb.txt][CLs limit on μ = σ/σ<sub>SM</sub>]] * [[http://cms-higgs-results.web.cern.ch/cms-higgs-results/Comb/HIG-11-022/pvala_comb.txt][<i>Local p</i>-values]]
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Topic revision: r4 - 2011-11-15
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GiovanniPetrucciani
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