Search for exclusive Higgs and Z boson decays to ωγ and Higgs boson decays to Kγ with the ATLAS detector

The ATLAS collaboration

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1 Citation (Scopus)

Abstract

Searches for the exclusive decays of the Higgs boson to an ω meson and a photon or a K meson and a photon can probe flavour-conserving and flavour-violating Higgs boson couplings to light quarks, respectively. Searches for these decays, along with the analogous Z boson decay to an ω meson and a photon, are performed with a pp collision data sample corresponding to integrated luminosities of up to 134 fb−1 collected at s=13 TeV with the ATLAS detector at the CERN Large Hadron Collider. The obtained 95% confidence-level upper limits on the respective branching fractions are B(H→ωγ)<5.5×10−4, B(H→Kγ)<2.2×10−4 and B(Z→ωγ)<3.9×10−6. The limits for H→ωγ and Z→ωγ are 370 times and 140 times the Standard Model expected values, respectively. The result for Z→ωγ corresponds to a two-orders-of-magnitude improvement over the limit obtained by the DELPHI experiment at LEP.

Original languageEnglish
Article number138292
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume847
DOIs
Publication statusPublished - 10 Dec 2023

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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