The, ATLASC, Aaboud, M, Aad, G et al. (79 more authors) (2016) Search for resonances in diphoton events at √s=13 TeV with the ATLAS detector. Journal of High Energy Physics, 2016. 1. ISSN 1126-6708
Abstract
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.[Figure not available: see fulltext.]
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Open Access, Copyright CERN, for the benefit of the ATLAS Collaboration. Article funded by SCOAP3 |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 29 Sep 2016 09:19 |
Last Modified: | 29 Sep 2016 09:19 |
Published Version: | http://dx.doi.org/10.1007/JHEP09(2016)001 |
Status: | Published |
Publisher: | Springer Verlag |
Refereed: | Yes |
Identification Number: | 10.1007/JHEP09(2016)001 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:105335 |