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arXiv · 1712.02758

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

ATLAS Collaboration
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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 $\sqrt{s}=13$ 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 $5.0\times10^{-4}$ and $10.4\times10^{-4}$, respectively. The corresponding 95$\% $ confidence level upper limits for the $Z$ boson decays are $0.7\times10^{-6}$ and $4.0\times10^{-6}$ for $ϕγ$ and $ργ$, respectively.

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ATLAS Collaboration. 2024-01-11. Search for exclusive Higgs and $Z$ boson decays to $ϕγ$ and $ργ$ with the ATLAS detector. https://doi.org/10.1007/jhep07(2018)127

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