Scientific article
Open access

Search for resonances in diphoton events at √s = 13 TeV with the ATLAS detector

ContributorsATLAS Collaboration
Published inThe journal of high energy physics, vol. 1609, p. 001-051
  • Open Access - SCOAP3
Publication date2016

Searches for new resonances decaying into two photons in the ATLAS experiment at the CERN Large Hadron Collider are described. The analysis is based on proton-proton collision data corresponding to an integrated luminosity of 3.2 fb −1 at √s = 13 TeV recorded in 2015. Two searches are performed, one targeted at a spin-2 particle of mass larger than 500 GeV, using Randall-Sundrum graviton states as a benchmark model, and one optimized for a spin-0 particle of mass larger than 200 GeV. Varying both the mass and the decay width, the most significant deviation from the background-only hypothesis is observed at a diphoton invariant mass around 750 GeV with local significances of 3.8 and 3.9 standard deviations in the searches optimized for a spin-2 and spin-0 particle, respectively. The global significances are estimated to be 2.1 standard deviations for both analyses. The consistency between the data collected at 13 TeV and 8 TeV is also evaluated. Limits on the production cross section times branching ratio to two photons for the two resonance types are reported.

  • Beyond Standard Model
  • Hadron-Hadron scattering (experiments)
  • Hard scattering
  • Particle and resonance production
  • Proton-proton scattering
Citation (ISO format)
ATLAS Collaboration. Search for resonances in diphoton events at √s = 13 TeV with the ATLAS detector. In: The journal of high energy physics, 2016, vol. 1609, p. 001–051. doi: 10.1007/JHEP09(2016)001
Main files (1)
Article (Published version)
ISSN of the journal1029-8479

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