Abstract
The paper presents a measurement of the Standard Model Higgs Boson decaying to b-quark pairs in the vector boson fusion (VBF) production mode. A sample corresponding to 126 hbox {fb}^{-1} of sqrt{s} = 13,text {TeV} proton–proton collision data, collected with the ATLAS experiment at the Large Hadron Collider, is analyzed utilizing an adversarial neural network for event classification. The signal strength, defined as the ratio of the measured signal yield to that predicted by the Standard Model for VBF Higgs production, is measured to be 0.95^{+0.38}_{-0.36} , corresponding to an observed (expected) significance of 2.6 (2.8) standard deviations from the background only hypothesis. The results are additionally combined with an analysis of Higgs bosons decaying to b-quarks, produced via VBF in association with a photon.
Highlights
Vector-boson fusion (VBF), wherein the Higgs boson is produced when quarks from each proton radiate weak vector bosons that fuse to form the Higgs boson, is the second most frequent Higgs boson production mechanism
This paper presents an update in the analysis of VBF production without a photon, using 126 fb−1 of proton–proton collision data collected by the ATLAS experiment at the Large Hadron Collider from 2016 to 2018
The measured μVBF corresponds to a cross-section σVBF× BH→bb = 2.07+−00..7700(stat.)+−00..4367(syst.) pb
Summary
Vector-boson fusion (VBF), wherein the Higgs boson is produced when quarks from each proton radiate weak vector bosons that fuse to form the Higgs boson, is the second most frequent Higgs boson production mechanism. VBF Higgs boson production has been measured by the ATLAS experiment in several decay channels, and the combined result for the signal strength is μVBF = 1.21 ± 0.18(stat.) ± 0.15(syst.) [12]. Studying Higgs boson decays into b-quarks in the vectorboson fusion channel provides an avenue to pursue this challbeyngthinegAsTigLnAaStureex.pePrriemvieonutsusminegas3u1refmb−en tos fo√f sthi=s process 13 TeV data yielded combined results for VBF production with and without a photon in the final state [14]. The observed signal strength for VBF production of H → bbwhen the other Higgs boson production modes are fixed to their Standard Model values, μVBF,H→bb, was 3.0+−11..76, corresponding to an observed (expected) significance of. This paper presents an update in the analysis of VBF production without a photon, using 126 fb−1 of proton–proton ( pp) collision data collected by the ATLAS experiment at the Large Hadron Collider from 2016 to 2018.
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