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Search for exclusive Higgs and Z boson decays to ϕγ and ργ with the ATLAS detector

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  • The ATLAS collaboration
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Article number127
<mark>Journal publication date</mark>19/07/2018
<mark>Journal</mark>Journal of High Energy Physics
Issue number127
Volume2018
Number of pages37
Publication StatusPublished
<mark>Original language</mark>English

Abstract

A search for the exclusive decays of the Higgs and Z bosons to a φ or ρ meson and a photon is performed with a pp collision data sample corresponding to an integrated luminosity of up to 35.6 fb−1 collected at √s=13 TeV with the ATLAS detector at the CERN Large Hadron Collider. These decays have been suggested as a probe of the Higgs boson couplings to light quarks. No significant excess of events is observed above the background, as expected from the Standard Model. Upper limits at 95% confidence level were obtained on the branching fractions of the Higgs boson decays to φγ and ργ of 4.8 × 10−4 and 8.8 × 10−4 , respectively. The corresponding 95% confidence level upper limits for the Z boson decays are 0.9 × 10−6 and 25 × 10−6 for φγ and ργ, respectively.