TWiki> CMSPublic Web>HiggsZZ2l2nu2012Summer>Hig12023TWiki (2012-07-06, PetraMerkel) EditAttachPDF

Search for the Higgs boson in the H → ZZ → 2l2ν channel in 10 fb−1 at 7 and 8 TeV

This is a condensed description with plots for the analysis CMS-HIG-12-023.

Abstract

A search for the Higgs boson in pp collisions at the LHC is presented. The results are based on a data sample corresponding to an integrated luminosity of 5 fb−1 at 7 TeV and 5 fb−1 at 8 TeV recorded by the CMS experiment. The search is conducted in the decay channel H → ZZ → 2l2ν. No excess above the expected event yields is observed. Limits are set on the production of a Standard Model Higgs boson.

Main Results

We find no evidence of Standard Model Higgs boson production. We measure the 95% mean expected and observed C.L. upper limits on the cross section σ × BR( H → ZZ → 2l 2ν) for masses in the range 200 − 600 GeV/c2 . Results are obtained using a CLs approach with a flat prior for the cross section, for 10 fb−1 . We also measure the ratio R of the 95% C.L. cross section upper limit σ to the SM cross section, σSM as a function of the Higgs mass mH. With 10 fb−1 , the Standard Model Higgs with masses in the range 273 − 600 GeV/c2 can be excluded at 95% CL.

Physics Analysis Summary

A note summarizing the analysis and the results can be found here: PAS

Figures

All public plots and tables from this analysis are collected here. Click on a figure to enlarge it, then double click to go to normal size again.
FIGURE Description
met_7TeV.png met_7TeV_vbf.png Missing transverse energy distribution combining the ee and mumu channels for 5.0 fb−1 of 7TeV data - left: non-VBF channels, right: VBF.
met_8TeV.png met_8TeV_vbf.png Missing transverse energy distribution combining the ee and mumu channels for 5.0 fb−1 of 8TeV data - left: non-VBF channels, right: VBF.
final_eeeq0jets_met_met_7TeV.png final_eeeq1jets_met_met_7TeV.png final_eegeq2jets_met_met_7TeV.png final_eevbf_met_met_7TeV.png Missing transverse energy distribution for the ee channel for 5.0 fb−1 of 7TeV data - from left to right: 0jets, 1jet, >=2jets, VBF.
final_eeeq0jets_met_met.png final_eeeq1jets_met_met.png final_eegeq2jets_met_met.png final_eevbf_met_met.png Missing transverse energy distribution for the ee channel for 5.0 fb−1 of 8TeV data - from left to right: 0jets, 1jet, >=2jets, VBF.
final_eeeq0jets_mt_7TeV.png final_eeeq1jets_mt_7TeV.png final_eegeq2jets_mt_7TeV.png final_eevbf_mt_7TeV.png Transverse mass distribution for the ee channel for 5.0 fb−1 of 7TeV data - from left to right: 0jets, 1jet, >=2jets, VBF.
final_eeeq0jets_mt.png final_eeeq1jets_mt.png final_eegeq2jets_mt.png final_eevbf_mt.png Transverse mass distribution for the ee channel for 5.0 fb−1 of 8TeV data - from left to right: 0jets, 1jet, >=2jets, VBF.
final_mumueq0jets_met_met_7TeV.png final_mumueq1jets_met_met_7TeV.png final_mumugeq2jets_met_met_7TeV.png final_mumuvbf_met_met_7TeV.png Missing transverse energy distribution for the mumu channel for 5.0 fb−1 of 7TeV data - from left to right: 0jets, 1jet, >=2jets, VBF.
final_mumueq0jets_met_met.png final_mumueq1jets_met_met.png final_mumugeq2jets_met_met.png final_mumuvbf_met_met.png Missing transverse energy distribution for the mumu channel for 5.0 fb−1 of 8TeV data - from left to right: 0jets, 1jet, >=2jets, VBF.
final_mumueq0jets_mt_7TeV.png final_mumueq1jets_mt_7TeV.png final_mumugeq2jets_mt_7TeV.png final_mumuvbf_mt_7TeV.png Transverse mass distribution for the mumu channel for 5.0 fb−1 of 7TeV data - from left to right: 0jets, 1jet, >=2jets, VBF.
final_mumueq0jets_mt_8TeV.png final_mumueq1jets_mt_8TeV.png final_mumugeq2jets_mt_8TeV.png final_mumuvbf_mt_8TeV.png Transverse mass distribution for the mumu channel for 5.0 fb−1 of 8TeV data - from left to right: 0jets, 1jet, >=2jets, VBF.
limit_7TeV.png limit_8TeV.png limit_combined.png Exclusion limits for a Standard Model Higgs boson in the H-->ZZ-->2l2nu channel - from left to right: using 5.0 fb−1 of 7TeV data, using 5.0 fb−1 of 8TeV data, 7 and 8TeV data combined.
FinalYields_7TeV.png Final event yields for backgrounds and expected Standard Model Higgs boson signal for 5.0 fb−1 of 7TeV data in the H-->ZZ-->2l2nu channel.
FinalYields_8TeV.png Final event yields for backgrounds and expected Standard Model Higgs boson signal for 5.0 fb−1 of 8TeV data in the H-->ZZ-->2l2nu channel.
FinalYields_PAS.png Final event yields for backgrounds and expected Standard Model Higgs boson signal for 10 fb−1 of 7 and 8TeV data in the H-->ZZ-->2l2nu channel.
ee_eventflow_7TeV.png ee_eventflow.png Event counts in the ee channel in data and background Monte Carlo at each of the pre-selection cuts for 5.0 fb−1 of 7TeV data (left) and 5.0 fb−1 of 8TeV data (right).
mumu_eventflow_7TeV.png mumu_eventflow.png Event counts in the mumu channel in data and background Monte Carlo at each of the pre-selection cuts for 5.0 fb−1 of 7TeV data (left) and 5.0 fb−1 of 8TeV data (right).
ee_pfvbfcandjeteta_gamma.png final_ee_pfvbfcandjetdeta.png Delta eta between two jets for VBF candidate events in the ee channel for 5.0 fb−1 of 7TeV data (left) and for 5.0 fb−1 of 8TeV data (right).
ee_pfvbfmjj_gamma.png final_ee_pfvbfmjj.png Invariant di-jet mass for VBF candidate events in the ee channel for 5.0 fb−1 of 7TeV data (left) and for 5.0 fb−1 of 8TeV data (right).
mumu_pfvbfcandjeteta_gamma.png final_mumu_pfvbfcandjetdeta.png Delta eta between two jets for VBF candidate events in the mumu channel for 5.0 fb−1 of 7TeV data (left) and for 5.0 fb−1 of 8TeV data (right).
mumu_pfvbfmjj_gamma.png final_mumu_pfvbfmjj.png Invariant di-jet mass for VBF candidate events in the mumu channel for 5.0 fb−1 of 7TeV data (left) and for 5.0 fb−1 of 8TeV data (right).
qt_eq0jets.png qt_eq1jets.png qt_eq2jets.png qt_vbf.png Photon pt distribution after reweighting for 5.0 fb−1 of 7TeV data - from left to right: 0jets, 1jet, >=2jets, VBF channels.
vbf7tev_rhophi.png vbf7tev_3d.png Rho-phi (left) and 3D (right) views of a VBF candidate ee event in the 7TeV dataset.

Attachments Attachments
Topic attachments
I Attachment History Action Size Date Who Comment
PNGpng FinalYields_7TeV.png r1 manage 141.5 K 2012-07-02 - 10:26 PetraMerkel Final yields table for 7TeV data
PNGpng FinalYields_8TeV.png r1 manage 136.9 K 2012-07-02 - 10:30 PetraMerkel Final yields table for 8TeV data
PNGpng FinalYields_PAS.png r1 manage 201.8 K 2012-07-02 - 10:32 PetraMerkel Final yields table for 7TeV and 8TeV data combined as shown in PAS
PNGpng ee_eventflow.png r1 manage 28.8 K 2012-06-28 - 18:42 PetraMerkel cut based event flow in ee channel for 8TeV data
PNGpng ee_eventflow_7TeV.png r1 manage 28.4 K 2012-06-28 - 18:43 PetraMerkel cut based event flow in ee channel for 7TeV data
PNGpng ee_pfvbfcandjeteta_gamma.png r1 manage 30.2 K 2012-06-28 - 18:31 PetraMerkel VBF deta distribution in ee channel at 7TeV
PNGpng ee_pfvbfmjj_gamma.png r1 manage 33.5 K 2012-06-28 - 18:32 PetraMerkel VBF m(jj) distribution in ee channel at 7TeV
PNGpng final_ee_pfvbfcandjetdeta.png r1 manage 30.5 K 2012-06-28 - 18:32 PetraMerkel VBF deta distribution in ee channel at 8TeV
PNGpng final_ee_pfvbfmjj.png r1 manage 34.0 K 2012-06-28 - 18:33 PetraMerkel VBF m(jj) distribution in ee channel at 8TeV
PNGpng final_eeeq0jets_met_met.png r1 manage 125.7 K 2012-07-02 - 10:38 PetraMerkel MET distribution for ee channel in 0jets bin at 8TeV
PNGpng final_eeeq0jets_met_met_7TeV.png r1 manage 136.0 K 2012-07-02 - 10:40 PetraMerkel MET distribution for ee channel in 0jets bin at 7TeV
PNGpng final_eeeq0jets_mt.png r1 manage 128.3 K 2012-07-02 - 10:41 PetraMerkel MT distribution for ee channel in 0jets bin at 8TeV
PNGpng final_eeeq0jets_mt_7TeV.png r1 manage 134.0 K 2012-07-02 - 10:41 PetraMerkel MT distribution for ee channel in 0jets bin at 7TeV
PNGpng final_eeeq1jets_met_met.png r1 manage 132.7 K 2012-07-02 - 10:42 PetraMerkel MET distribution for ee channel in 1jets bin at 8TeV
PNGpng final_eeeq1jets_met_met_7TeV.png r1 manage 137.7 K 2012-07-02 - 10:43 PetraMerkel MET distribution for ee channel in 1jets bin at 7TeV
PNGpng final_eeeq1jets_mt.png r1 manage 133.2 K 2012-07-02 - 10:44 PetraMerkel MT distribution for ee channel in 1jet bin at 8TeV
PNGpng final_eeeq1jets_mt_7TeV.png r1 manage 133.0 K 2012-07-02 - 10:45 PetraMerkel MT distribution for ee channel in 1jet bin at 7TeV
PNGpng final_eegeq2jets_met_met.png r1 manage 142.3 K 2012-07-02 - 10:45 PetraMerkel MET distribution for ee channel in 2jets bin at 8TeV
PNGpng final_eegeq2jets_met_met_7TeV.png r1 manage 128.8 K 2012-07-02 - 10:46 PetraMerkel MET distribution for ee channel in 2jets bin at 7TeV
PNGpng final_eegeq2jets_mt.png r1 manage 124.6 K 2012-07-02 - 10:47 PetraMerkel MT distribution for ee channel in 2jets bin at 8TeV
PNGpng final_eegeq2jets_mt_7TeV.png r1 manage 119.9 K 2012-07-02 - 10:48 PetraMerkel MT distribution for ee channel in 2jets bin at 7TeV
PNGpng final_eevbf_met_met.png r1 manage 121.7 K 2012-07-02 - 10:50 PetraMerkel MET distribution for ee channel in VBF bin at 8TeV
PNGpng final_eevbf_met_met_7TeV.png r1 manage 129.1 K 2012-07-02 - 10:50 PetraMerkel MET distribution for ee channel in VBF bin at 7TeV
PNGpng final_eevbf_mt.png r1 manage 128.6 K 2012-07-02 - 10:50 PetraMerkel MT distribution for ee channel in VBF bin at 8TeV
PNGpng final_eevbf_mt_7TeV.png r1 manage 123.8 K 2012-07-02 - 10:51 PetraMerkel MT distribution for ee channel in VBF bin at 7TeV
PNGpng final_mumu_pfvbfcandjetdeta.png r1 manage 30.7 K 2012-06-28 - 18:33 PetraMerkel VBF deta distribution in mumu channel at 8TeV
PNGpng final_mumu_pfvbfmjj.png r1 manage 35.2 K 2012-06-28 - 18:34 PetraMerkel VBF m(jj) distribution in mumu channel at 8TeV
PNGpng final_mumueq0jets_met_met.png r1 manage 128.1 K 2012-07-02 - 10:53 PetraMerkel MET distribution for mumu channel in 0jets bin at 8TeV
PNGpng final_mumueq0jets_met_met_7TeV.png r1 manage 139.6 K 2012-07-02 - 10:53 PetraMerkel MET distribution for mumu channel in 0jets bin at 7TeV
PNGpng final_mumueq0jets_mt_7TeV.png r1 manage 141.3 K 2012-07-02 - 10:54 PetraMerkel MT distribution for mumu channel in 0jets bin at 7TeV
PNGpng final_mumueq0jets_mt_8TeV.png r1 manage 130.8 K 2012-07-02 - 10:59 PetraMerkel MT distribution for mumu channel in 0jets bin at 8TeV
PNGpng final_mumueq1jets_met_met.png r1 manage 134.6 K 2012-07-02 - 11:01 PetraMerkel MET distribution for mumu channel in 1jets bin at 8TeV
PNGpng final_mumueq1jets_met_met_7TeV.png r1 manage 143.3 K 2012-07-02 - 11:01 PetraMerkel MET distribution for mumu channel in 1jets bin at 7TeV
PNGpng final_mumueq1jets_mt_7TeV.png r1 manage 139.4 K 2012-07-02 - 11:03 PetraMerkel MT distribution for mumu channel in 1jet bin at 7TeV
PNGpng final_mumueq1jets_mt_8TeV.png r1 manage 138.9 K 2012-07-02 - 11:02 PetraMerkel MT distribution for mumu channel in 1jet bin at 8TeV
PNGpng final_mumugeq2jets_met_met.png r1 manage 140.0 K 2012-07-02 - 11:05 PetraMerkel MET distribution for mumu channel in 2jets bin at 8TeV
PNGpng final_mumugeq2jets_met_met_7TeV.png r1 manage 149.7 K 2012-07-02 - 11:05 PetraMerkel MET distribution for mumu channel in 2jets bin at 7TeV
PNGpng final_mumugeq2jets_mt_7TeV.png r1 manage 127.7 K 2012-07-02 - 11:06 PetraMerkel MT distribution for mumu channel in 2jets bin at 7TeV
PNGpng final_mumugeq2jets_mt_8TeV.png r1 manage 135.0 K 2012-07-02 - 11:06 PetraMerkel MT distribution for mumu channel in 2jets bin at 8TeV
PNGpng final_mumuvbf_met_met.png r1 manage 139.7 K 2012-07-02 - 11:12 PetraMerkel MET distribution for mumu channel in VBF bin at 8TeV
PNGpng final_mumuvbf_met_met_7TeV.png r1 manage 128.9 K 2012-07-02 - 11:13 PetraMerkel MET distribution for mumu channel in VBF bin at 7TeV
PNGpng final_mumuvbf_mt_7TeV.png r1 manage 134.2 K 2012-07-02 - 11:13 PetraMerkel MT distribution for mumu channel in VBF bin at 7TeV
PNGpng final_mumuvbf_mt_8TeV.png r1 manage 136.0 K 2012-07-02 - 11:14 PetraMerkel MT distribution for mumu channel in VBF bin at 8TeV
PNGpng limit_7TeV.png r2 r1 manage 124.7 K 2012-07-06 - 16:30 PetraMerkel Limit plot for 7TeV data
PNGpng limit_8TeV.png r2 r1 manage 134.2 K 2012-07-06 - 16:31 PetraMerkel Limit plot for 8TeV data
PNGpng limit_combined.png r2 r1 manage 129.4 K 2012-07-06 - 16:31 PetraMerkel Combined limit plot for both years and all channels
PNGpng met_7TeV.png r1 manage 156.7 K 2012-07-02 - 11:19 PetraMerkel PAS plot: MET all channels combined at 7TeV
PNGpng met_7TeV_vbf.png r1 manage 136.7 K 2012-07-02 - 11:19 PetraMerkel PAS plot: MET for VBF channel combined at 7TeV
PNGpng met_8TeV.png r1 manage 146.9 K 2012-07-02 - 11:19 PetraMerkel PAS plot: MET all channels combined at 8TeV
PNGpng met_8TeV_vbf.png r1 manage 130.3 K 2012-07-02 - 11:20 PetraMerkel PAS plot: MET for VBF channel at 8TeV
PNGpng mumu_eventflow.png r1 manage 28.7 K 2012-06-28 - 18:42 PetraMerkel cut based event flow in mumu channel for 8TeV data
PNGpng mumu_eventflow_7TeV.png r1 manage 28.4 K 2012-06-28 - 18:43 PetraMerkel cut based event flow in mumu channel for 7TeV data
PNGpng mumu_pfvbfcandjeteta_gamma.png r1 manage 30.9 K 2012-06-28 - 18:31 PetraMerkel VBF deta distribution in mumu channel at 7TeV
PNGpng mumu_pfvbfmjj_gamma.png r1 manage 34.7 K 2012-06-28 - 18:32 PetraMerkel VBF m(jj) distribution in mumu channel at 7TeV
PNGpng qt_eq0jets.png r1 manage 27.8 K 2012-07-02 - 09:41 PetraMerkel Photon pt distribution after reweighting for 0jets events
PNGpng qt_eq1jets.png r1 manage 33.5 K 2012-07-02 - 09:41 PetraMerkel Photon pt distribution after reweighting for 1jet events
PNGpng qt_eq2jets.png r1 manage 32.8 K 2012-07-02 - 09:42 PetraMerkel Photon pt distribution after reweighting for 2jets events
PNGpng qt_vbf.png r1 manage 28.0 K 2012-07-02 - 09:42 PetraMerkel Photon pt distribution after reweighting for VBF events
PNGpng vbf7tev_3d.png r1 manage 184.5 K 2012-07-02 - 11:25 PetraMerkel Event display of VBF ee candidate at 7TeV, 3D view
PNGpng vbf7tev_rhophi.png r1 manage 148.2 K 2012-07-02 - 11:24 PetraMerkel Event display of VBF ee candidate at 7TeV, rhophi view
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Topic revision: r3 - 2012-07-06 - PetraMerkel
 
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