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

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DOI Доступ к ресурсу на сайте издателя			10.1007/JHEP07(2018)127

Title: Search for exclusive Higgs and Z boson decays to фγ and ργ with the ATLAS detector
Creator: Aad, G.
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Abbott, B.
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Chelkov, G. A.
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Khodinov, A.
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Vaniachine, A.
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Tsybychev, D.
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Aaboud, M.
Date: 2018
DOI: 10.1007/JHEP07(2018)127
Description: 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 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.