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Search for a standard model Higgs bosons decaying to tau pairs in pp collisions

Abstract

A search for a standard model Higgs bosons decaying to tau pairs at a center-of-mass energy of 7 and 8 TeV is performed using a dataset corresponding to an integrated luminosity of 10 fb^-1 recorded by the CMS experiment at the LHC in 2011 and 2012. No excess of events is observed in the tau-pair invariant-mass spectrum. In the mass range of 110–145 GeV upper limits at 95% confidence level (CL) on the production cross section are determined. We exclude a Higgs boson with mH = 125 GeV with a production cross section 1.06 times of that predicted by the standard model.

Main Results

Measurements of this search are the 95% CL limits on the standard model cross section.

SM Higgs boson limit table

mass -95% -68% median +68% +95% obs Limit (pb)
110 GeV 0.742 0.987 1.37 1.9 2.52 1.21
115 GeV 0.725 0.964 1.34 1.86 2.47 1.2
120 GeV 0.708 0.942 1.3 1.81 2.41 1.19
125 GeV 0.695 0.925 1.28 1.78 2.36 1.06
130 GeV 0.729 0.97 1.34 1.87 2.48 1.2
135 GeV 0.835 1.11 1.54 2.14 2.84 1.81
140 GeV 0.979 1.3 1.8 2.51 3.33 2.2
145 GeV 1.28 1.7 2.36 3.28 4.35 3.36

Figures from CMS-HIG-12-018

eTau_vbf_rescaled_78TeV.png eTau_boost_rescaled_78TeV.png eTau_0jet_rescaled_78TeV.png
Figure 1: Di-tau mass in the eTau channel for the VBF, boost, and 0 jet categories

muTau_vbf_rescaled_78TeV.png muTau_boost_rescaled_78TeV.png muTau_0jet_rescaled_78TeV.png
Figure 2: Di-tau mass in the muTau channel for the VBF, boost and 0 jet categories

emu_vbf_rescaled_78TeV.png emu_boost_rescaled_78TeV.png emu_0jet_rescaled_78TeV.png
Figure 3: Di-tau mass in the e mu channel for the VBF, boost and 0 jet categories

mumu_rescaled_vbf.png mumu_rescaled_1jet_LOG.png mumu_rescaled_0jet_LOG.png
Figure 4: Di-tau mass in the mumu channel for the VBF, boost and 0 jet categories

limits-20112012_sm.png
Figure 5: Expected and observed limit at 95% CL for all channels and categories.

Additional plots for public talks

mumu_mtt_incl_LOG.png sv_2.png sv.png svfitmass_incl.png
Figure: Inclusive di-tau full mass in the mumu, mutau_had, etau_had and emu channels

pzetavar.png njets_log.png nbjets_log.png 2011_mutau_mt.png
Figure: Pzeta, number of jets and number of bjets in the emu channel. M_T(mu,MET) in the mutau channel

mumu_dcaSig_LOG.png mumu_dimuonPtRatio_LOG.png mumu_cosThetaStar_LOG.png mumu_mvaBDT_LOG.png
Figure: mumu channel: dcaSig - inter-muon distance of closest approach significance; dimuonPtRatio - the dimuon pt to the scalar sum of muon's pt ratio; cosThetaStar - cosine of the mu+ decay angle in the rest frame of the dimuon system (assuming Z->mumu decay); mvaBDT - final BDT discriminant.

evolution.png per_category.png per_channel.png per_period.png
Figure: Expected limit i) evolution ii) per category iii) per channel iv) per data period

injected-no-signal.png injected.png

Figure: Expected limit after injecting a Standard Model Higgs signal. The observed limit is also shown on the right plot.

HiggsMass_v2.png
Figure: Full mass reconstruction algorithm (SVFit) - simulation

sysTable.png
Figure: Summary of systematics

ERRATUM

in HIG-12-018 tables contained wrong values for the efficiencies for reconstruction each individual signal contribution in each corresponding event categories. Tables with the corrected efficiencies in each decay channel are shown below:

e-tau-yields.png
Figure: Yields and signal efficiencies in each event category in the e-tau decay channel.

mu-tau-yields.png
Figure: Yields and signal efficiencies in each event category in the mu-tau decay channel.

e-mu-yields.png
Figure: Yields and signal efficiencies in each event category in the e-mu decay channel.

mu-mu-yields.png
Figure: Yields and signal efficiencies in each event category in the mu-mu decay channel.
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PDFpdf 2011_mutau_mt.pdf r2 r1 manage 19.9 K 2012-07-02 - 14:33 MonicaVazquezAcosta  
PNGpng 2011_mutau_mt.png r2 r1 manage 21.3 K 2012-07-02 - 14:33 MonicaVazquezAcosta  
PDFpdf HiggsMass_v2.pdf r1 manage 14.3 K 2012-07-01 - 00:49 MonicaVazquezAcosta  
PNGpng HiggsMass_v2.png r1 manage 16.6 K 2012-06-29 - 22:41 MonicaVazquezAcosta  
PDFpdf e-mu-yields.pdf r1 manage 16.4 K 2012-07-24 - 09:41 RogerWolf  
PNGpng e-mu-yields.png r1 manage 28.0 K 2012-07-24 - 09:27 RogerWolf  
PDFpdf e-tau-yields.pdf r1 manage 19.0 K 2012-07-24 - 09:41 RogerWolf  
PNGpng e-tau-yields.png r1 manage 31.8 K 2012-07-24 - 09:27 RogerWolf  
PDFpdf eTau_0jet_rescaled_78TeV.pdf r3 r2 r1 manage 15.9 K 2012-07-04 - 15:37 MonicaVazquezAcosta  
PNGpng eTau_0jet_rescaled_78TeV.png r3 r2 r1 manage 17.7 K 2012-07-04 - 15:38 MonicaVazquezAcosta  
PDFpdf eTau_boost_rescaled_78TeV.pdf r3 r2 r1 manage 15.8 K 2012-07-04 - 15:38 MonicaVazquezAcosta  
PNGpng eTau_boost_rescaled_78TeV.png r3 r2 r1 manage 17.1 K 2012-07-04 - 15:38 MonicaVazquezAcosta  
PDFpdf eTau_vbf_rescaled_78TeV.pdf r3 r2 r1 manage 16.2 K 2012-07-04 - 15:38 MonicaVazquezAcosta  
PNGpng eTau_vbf_rescaled_78TeV.png r3 r2 r1 manage 18.7 K 2012-07-04 - 15:39 MonicaVazquezAcosta  
PDFpdf emu_0jet_rescaled_78TeV.pdf r3 r2 r1 manage 15.3 K 2012-07-04 - 15:36 MonicaVazquezAcosta  
PNGpng emu_0jet_rescaled_78TeV.png r3 r2 r1 manage 16.4 K 2012-07-04 - 15:36 MonicaVazquezAcosta  
PDFpdf emu_boost_rescaled_78TeV.pdf r3 r2 r1 manage 15.3 K 2012-07-04 - 15:36 MonicaVazquezAcosta  
PNGpng emu_boost_rescaled_78TeV.png r3 r2 r1 manage 16.4 K 2012-07-04 - 15:37 MonicaVazquezAcosta  
PDFpdf emu_vbf_rescaled_78TeV.pdf r3 r2 r1 manage 15.7 K 2012-07-04 - 15:37 MonicaVazquezAcosta  
PNGpng emu_vbf_rescaled_78TeV.png r3 r2 r1 manage 17.4 K 2012-07-04 - 15:37 MonicaVazquezAcosta  
PDFpdf evolution.pdf r3 r2 r1 manage 14.9 K 2012-07-04 - 15:32 MonicaVazquezAcosta  
PNGpng evolution.png r3 r2 r1 manage 19.1 K 2012-07-04 - 15:32 MonicaVazquezAcosta  
PDFpdf injected-no-signal.pdf r2 r1 manage 14.7 K 2012-07-04 - 15:31 MonicaVazquezAcosta  
PNGpng injected-no-signal.png r2 r1 manage 19.1 K 2012-07-04 - 15:31 MonicaVazquezAcosta  
PDFpdf injected.pdf r2 r1 manage 15.1 K 2012-07-04 - 15:31 MonicaVazquezAcosta  
PNGpng injected.png r2 r1 manage 20.2 K 2012-07-04 - 15:31 MonicaVazquezAcosta  
PDFpdf limits-20112012_sm.pdf r2 r1 manage 15.0 K 2012-07-04 - 15:30 MonicaVazquezAcosta  
PNGpng limits-20112012_sm.png r2 r1 manage 19.4 K 2012-07-04 - 15:30 MonicaVazquezAcosta  
PDFpdf mu-mu-yields.pdf r1 manage 19.0 K 2012-07-24 - 09:41 RogerWolf  
PNGpng mu-mu-yields.png r1 manage 32.9 K 2012-07-24 - 09:27 RogerWolf  
PDFpdf mu-tau-yields.pdf r1 manage 19.4 K 2012-07-24 - 09:41 RogerWolf  
PNGpng mu-tau-yields.png r1 manage 33.2 K 2012-07-24 - 09:27 RogerWolf  
PDFpdf muTau_0jet_rescaled_78TeV.pdf r3 r2 r1 manage 15.4 K 2012-07-04 - 15:39 MonicaVazquezAcosta  
PNGpng muTau_0jet_rescaled_78TeV.png r3 r2 r1 manage 17.1 K 2012-07-04 - 15:39 MonicaVazquezAcosta  
PDFpdf muTau_boost_rescaled_78TeV.pdf r3 r2 r1 manage 15.6 K 2012-07-04 - 15:39 MonicaVazquezAcosta  
PNGpng muTau_boost_rescaled_78TeV.png r3 r2 r1 manage 17.2 K 2012-07-04 - 15:39 MonicaVazquezAcosta  
PDFpdf muTau_vbf_rescaled_78TeV.pdf r3 r2 r1 manage 15.9 K 2012-07-04 - 15:40 MonicaVazquezAcosta  
PNGpng muTau_vbf_rescaled_78TeV.png r3 r2 r1 manage 17.2 K 2012-07-04 - 15:40 MonicaVazquezAcosta  
PDFpdf mumu_cosThetaStar_LOG.pdf r1 manage 17.2 K 2012-07-01 - 08:02 MonicaVazquezAcosta  
PNGpng mumu_cosThetaStar_LOG.png r1 manage 14.2 K 2012-07-01 - 08:02 MonicaVazquezAcosta  
PDFpdf mumu_dcaSig_LOG.pdf r1 manage 21.8 K 2012-07-01 - 08:01 MonicaVazquezAcosta  
PNGpng mumu_dcaSig_LOG.png r1 manage 17.0 K 2012-07-01 - 08:01 MonicaVazquezAcosta  
PDFpdf mumu_dimuonPtRatio_LOG.pdf r1 manage 17.8 K 2012-07-01 - 08:03 MonicaVazquezAcosta  
PNGpng mumu_dimuonPtRatio_LOG.png r1 manage 17.1 K 2012-07-01 - 08:02 MonicaVazquezAcosta  
PDFpdf mumu_mtt_incl_LOG.pdf r1 manage 17.0 K 2012-06-29 - 22:38 MonicaVazquezAcosta  
PNGpng mumu_mtt_incl_LOG.png r1 manage 16.3 K 2012-06-29 - 22:38 MonicaVazquezAcosta  
PDFpdf mumu_mvaBDT_LOG.pdf r1 manage 16.5 K 2012-07-01 - 08:03 MonicaVazquezAcosta  
PNGpng mumu_mvaBDT_LOG.png r1 manage 16.2 K 2012-07-01 - 08:03 MonicaVazquezAcosta  
PDFpdf mumu_rescaled_0jet_LOG.pdf r3 r2 r1 manage 16.1 K 2012-07-04 - 15:44 MonicaVazquezAcosta  
PNGpng mumu_rescaled_0jet_LOG.png r2 r1 manage 15.3 K 2012-07-04 - 15:44 MonicaVazquezAcosta  
PDFpdf mumu_rescaled_1jet_LOG.pdf r3 r2 r1 manage 16.0 K 2012-07-04 - 15:44 MonicaVazquezAcosta  
PNGpng mumu_rescaled_1jet_LOG.png r2 r1 manage 14.8 K 2012-07-04 - 15:44 MonicaVazquezAcosta  
PDFpdf mumu_rescaled_vbf.pdf r3 r2 r1 manage 14.9 K 2012-07-04 - 15:45 MonicaVazquezAcosta  
PNGpng mumu_rescaled_vbf.png r2 r1 manage 14.0 K 2012-07-04 - 15:46 MonicaVazquezAcosta  
PDFpdf nbjets_log.pdf r1 manage 15.1 K 2012-06-29 - 22:44 MonicaVazquezAcosta  
PNGpng nbjets_log.png r1 manage 19.2 K 2012-06-29 - 22:44 MonicaVazquezAcosta  
PDFpdf njets_log.pdf r1 manage 15.4 K 2012-06-29 - 22:44 MonicaVazquezAcosta  
PNGpng njets_log.png r1 manage 19.3 K 2012-06-29 - 22:45 MonicaVazquezAcosta  
PDFpdf per_category.pdf r4 r3 r2 r1 manage 15.3 K 2012-07-04 - 15:30 MonicaVazquezAcosta  
PNGpng per_category.png r3 r2 r1 manage 19.0 K 2012-07-04 - 15:30 MonicaVazquezAcosta  
PDFpdf per_channel.pdf r3 r2 r1 manage 15.7 K 2012-07-04 - 15:29 MonicaVazquezAcosta  
PNGpng per_channel.png r2 r1 manage 21.9 K 2012-07-04 - 15:29 MonicaVazquezAcosta  
PDFpdf per_period.pdf r4 r3 r2 r1 manage 15.2 K 2012-07-04 - 15:29 MonicaVazquezAcosta  
PNGpng per_period.png r3 r2 r1 manage 20.0 K 2012-07-04 - 15:29 MonicaVazquezAcosta  
PDFpdf pzetavar.pdf r1 manage 16.9 K 2012-06-29 - 22:45 MonicaVazquezAcosta  
PNGpng pzetavar.png r1 manage 23.2 K 2012-06-29 - 22:45 MonicaVazquezAcosta  
PDFpdf sv.pdf r1 manage 18.3 K 2012-06-29 - 22:40 MonicaVazquezAcosta  
PNGpng sv.png r1 manage 19.5 K 2012-06-29 - 22:40 MonicaVazquezAcosta  
PDFpdf sv_2.pdf r1 manage 17.1 K 2012-06-29 - 22:39 MonicaVazquezAcosta  
PNGpng sv_2.png r1 manage 19.7 K 2012-06-29 - 22:39 MonicaVazquezAcosta  
PDFpdf svfitmass_incl.pdf r1 manage 39.1 K 2012-07-01 - 08:20 MonicaVazquezAcosta  
PNGpng svfitmass_incl.png r1 manage 23.2 K 2012-06-29 - 22:43 MonicaVazquezAcosta  
PDFpdf sysTable.pdf r1 manage 99.4 K 2012-07-01 - 08:20 MonicaVazquezAcosta  
PNGpng sysTable.png r1 manage 140.6 K 2012-06-29 - 22:40 MonicaVazquezAcosta  
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