This page documents the snowmass2013 activities from LPC in the Higgs group.


We plan to study the precision of the coupling measurements in both LHC and ILC.

  • n-D fits in LHC
  • 1D fits in LHC
  • n-D fits in ee->Z(ll)H(bb)
  • 1D fits in ee->Z(ll)H(bb)

ILC Target luminosity and machine parameters

250/fb at 250 GeV; 350/fb at 350 GeV; 500/fb at 500 GeV; 1000/fb at 1000 GeV

LHC Target Luminosities and sqrt(s)

300/fb at 14 TeV; 3000/fb at 14 TeV

LHC Based Analysis

Multidimensional fits

  • Fits on the 2e2mu channel
  • The acceptance effects
  • The 4e/4mu interference effects

MC Samples

LHC MCSamples H->4l analysis

LHC MCSamples VBF analysis

LHC MC Samples VH analysis

Fitting analysis

Follow this link lhcfits

VBF summary

VBF summary from Sara

ILC Based Analysis


  • SM Higgs Analytical distributions
  • Validate the new generator for other spin 0 hypotheses
  • Multidimensional fits


  • pt > 5. and |eta|<2.4 for all fermions in the final states
  • Higgs (b+bbar) mass in the window of [115-140] GeV
  • Z(ll) mass window [81,101] GeV

Signal and background yields per/fb

Below numbers assume a 85% reconstruction efficiency, which should take care of the acceptance as well. The ZZ background is estimated as 1/10 of background. So these nubmers should only be used after all the selections defined ahead.

sqrt(s) XS BR XS*BR lumi Nsig (raw) Nsig Nbkg
250 GeV 240 fb 0.0673*0.577 9.35 fb 250 /fb 2337 2000 200
350 GeV 129 fb 0.0673*0.577 5.03 fb 350 /fb 1760 1500 150
500 GeV 57 fb 0.0673*0.577 2.22 fb 500 /fb 1110 1000 100
1000 GeV 13 fb 0.0673*0.577 0.505 fb 1000 /fb 505 500 50

MC Samples

Follow this page [ILCMCSamples

Analysis Code


Seattle Report

ILC results for Seattle Report

Documentation and talks

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Topic revision: r23 - 2013-08-30 - AndreiGritsan
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