Simulation of a cross section and mass measurement of a standard model Higgs boson in thegg→H→WW→ℓνℓνchannel at the CERN LHC

The potential to discover a standard model-like Higgs boson at the LHC in the mass range from 150–180 GeV, decaying into a pair of W bosons with subsequent leptonic decays, has been established during the last 10 years. Assuming that such a signal will eventually be observed, the analysis described in this paper investigates how accurate the signal cross section can be measured and how the observable lepton $p_{\mathrm{T}}$ spectra can be used to constrain the mass of the Higgs boson. Combining the signal cross section with the analysis of the lepton $p_{\mathrm{T}}$ spectra and assuming the SM Higgs cross section is known with an accuracy of $\pm 5\%$, our study indicates that an integrated luminosity of about $10{\mathrm{fb}}^{-1}$ allows to measure the mass of a SM Higgs boson with an accuracy between 2 and 2.5 GeV.