Search for Higgs boson decays to beyond-the-Standard-Model light bosons in four-lepton events with the ATLAS detector at root s=13 TeV


Aaboud M., Aad G., Abbott B., Abdinov O., Abeloos B., Abidi S. H. , ...Daha Fazla

JOURNAL OF HIGH ENERGY PHYSICS, sa.6, 2018 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: Konu: 6
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1007/jhep06(2018)166
  • Dergi Adı: JOURNAL OF HIGH ENERGY PHYSICS

Özet

A search is conducted for a beyond-the-Standard-Model boson using events where a Higgs boson with mass 125 GeV decays to four leptons (l = e or mu). This decay is presumed to occur via an intermediate state which contains one or two on-shell, promptly decaying bosons: H -> ZX/XX -> 4l , where X is a new vector boson Z(d) or pseudoscalar a with mass between 1 and 60 GeV. The search uses pp collision data collected with the ATLAS detector at the LHC with an integrated luminosity of 36.1 fb(-1) at a centre-of-mass energy root s = 13TeV. No significant excess of events above Standard Model background predictions is observed; therefore, upper limits at 95% confidence level are set on model-independent fiducial cross-sections, and on the Higgs boson decay branching ratios to vector and pseudoscalar bosons in two benchmark models.