Search for the Decay of the Higgs Boson to Charm Quarks with the ATLAS Experiment


A direct search for the standard model Higgs boson decaying to a pair of charm quarks is presented. Associated production of the Higgs and Z bosons, in the decay mode ZH → ℓ⁺ℓ⁻ cc̅ is studied. A data set with an integrated luminosity of 36.1 fb⁻¹ of pp collisions at √s = 13TeV recorded by the ATLAS experiment at the LHC is used. The H → cc̅ signature is identified using charm-tagging algorithms. The observed (expected) upper limit on σ(pp → ZH) x ℬ(H → cc̅) is 2.7 (3.9{_{-1.1}^{+2.1}}) pb at the 95% confidence level for a Higgs boson mass of 125 GeV, while the standard model value is 26 fb.



Higgs bosons, Standard model, Particles (Nuclear physics), Large Hadron Collider (France and Switzerland), Particles (Nuclear physics)—Charm, Quarks, Z bosons


CC BY 4.0 (Attribution), ©2018 CERN, for the ATLAS Collaboration