10-1007-JHEP09-2016-001.pdf (1.88 MB)
Search for resonances in diphoton events at sv=13s=13 TeV with the ATLAS detector
journal contribution
posted on 2023-06-09, 03:40 authored by Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, C A Chavez Barajas, Antonella De SantoAntonella De Santo, T C Potter, Fabrizio SalvatoreFabrizio Salvatore, K Suruliz, Mark SuttonMark Sutton, I Santoyo Castillo, Iacopo Vivarelli, et al The Atlas CollaborationSearches 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 v =13 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.
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- Published
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- Published version
Journal
Journal of High Energy PhysicsISSN
1029-8479Publisher
Springer VerlagExternal DOI
Volume
1Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Experimental Particle Physics Research Group Publications
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- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2016-10-25First Open Access (FOA) Date
2016-10-25First Compliant Deposit (FCD) Date
2016-10-24Usage metrics
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