Abstract
Higgs boson production cross-sections in proton–proton collisions are measured in the H→WW⁎→eνμν decay channel. The proton–proton collision data were produced at the Large Hadron Collider at a centre-of-mass energy of 13 TeV and recorded by the ATLAS detector in 2015 and 2016, corresponding to an integrated luminosity of 36.1fb−1. The product of the H→WW⁎ branching fraction times the gluon–gluon fusion and vector-boson fusion cross-sections are measured to be 11.4−1.1+1.2(stat.)−1.7+1.8(syst.)pb and 0.50−0.22+0.24(stat.)±0.17(syst.)pb, respectively, in agreement with Standard Model predictions.
Highlights
This Letter presents a measurement of the inclusive Higgs boson production cross-sections via gluon–gluon fusion and vector-boson fusion (VBF) through the decay H→ W W ∗→ eνμν using 36.1 fb−1 of proton–proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector
Higgs boson production via ggF was simulated at next-to-nextto-leading-order (NNLO) accuracy in QCD using the Powheg-Box v2 NNLOPS program [8], with the PDF4LHC15 NNLO set of parton distribution functions (PDF) [9]
While NNLO cross-sections are available for diboson production processes [40,41,42], the Sherpa MEPS@NLO prescription [36] is used in this analysis
Summary
This Letter presents a measurement of the inclusive Higgs boson production cross-sections via gluon–gluon fusion (ggF) and vector-boson fusion (VBF) through the decay H→ W W ∗→ eνμν using 36.1 fb−1 of proton–proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector. The H→ W W ∗ decay channel has the second-largest branching fraction and allowed the most precise Higgs boson cross-section measurements in Run-1 [4]. The measured cross-section of the ggF production process probes the Higgs boson couplings to gluons and heavy quarks, while the VBF process directly probes the couplings to W and Z bosons. The muon spectrometer comprises separate trigger chambers within the range |η| < 2.4 and high-precision tracking chambers within the range |η| < 2.7, measuring the deflection of muons in a magnetic field generated by the three superconducting toroidal magnets. A two-level trigger system is used to select events [7]
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