Search for Higgs boson production in association with a high-energy photon via vector-boson fusion with decay into bottom quark pairs at $\sqrt{s}$=13 TeV with the ATLAS detector

Abstract

A search is presented for the production of the Standard Model Higgs boson in association with a high-energy photon. With a focus on the vector-boson fusion process and the dominant Higgs boson decay into $b$-quark pairs, the search benefits from a large reduction of multijet background compared to more inclusive searches. Results are reported from the analysis of 132 fb${}^{-1}$ of $pp$ collision data at $\sqrt{s}$=13 TeV collected with the ATLAS detector at the LHC. The measured Higgs boson signal yield in this final-state signature is $1.3\pm 1.0$ times the Standard Model prediction. The observed significance of the Higgs boson signal above the background is 1.3 standard deviations, compared to an expected significance of 1.0 standard deviations.

41 pages in total, author list starting page 25, 6 figures, 3 tables, final version published in JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2020-14/

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• Measurements of Higgs Bosons Decaying to Bottom Quarks from Vector Boson Fusion Production with the ATLAS Experiment at $\sqrt{s}=$ 13 TeV
• The Weak Scale as a Trigger
• Configuration and performance of the ATLAS $b$-jet triggers in Run 2
• The ATLAS Trigger System for LHC Run 3 and Trigger performance in 2022
• NNLO QCD corrections to weak boson fusion Higgs boson production in the $H\to b\bar{b}$ and $H\to W{W}^{\ast }\to 4l$ decay channels
• Fast $b$-tagging at the high-level trigger of the ATLAS experiment in LHC Run 3
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• Illuminating all-hadronic final states with a photon: Exotic decays of the Higgs boson to four bottom quarks in vector boson fusion plus gamma at hadron colliders