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

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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 ta...

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Autor principal:	The ATLAS collaboration
Formato:	JOUR
Materias:	Beyond Standard Model Hadron-Hadron scattering (experiments) Hard scattering Particle and resonance production proton-proton scattering
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_11266708_v2016_n9_p_TheATLAScollaboration
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_11266708_v2016_n9_p_TheATLAScollaboration
record_format	dspace
spelling	todo:paper_11266708_v2016_n9_p_TheATLAScollaboration2023-10-03T16:07:31Z Search for resonances in diphoton events at √s=13 TeV with the ATLAS detector The ATLAS collaboration Beyond Standard Model Hadron-Hadron scattering (experiments) Hard scattering Particle and resonance production proton-proton scattering 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.] © 2016, The Author(s). JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_11266708_v2016_n9_p_TheATLAScollaboration
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Beyond Standard Model Hadron-Hadron scattering (experiments) Hard scattering Particle and resonance production proton-proton scattering
spellingShingle	Beyond Standard Model Hadron-Hadron scattering (experiments) Hard scattering Particle and resonance production proton-proton scattering The ATLAS collaboration Search for resonances in diphoton events at √s=13 TeV with the ATLAS detector
topic_facet	Beyond Standard Model Hadron-Hadron scattering (experiments) Hard scattering Particle and resonance production proton-proton scattering
description	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.] © 2016, The Author(s).
format	JOUR
author	The ATLAS collaboration
author_facet	The ATLAS collaboration
author_sort	The ATLAS collaboration
title	Search for resonances in diphoton events at √s=13 TeV with the ATLAS detector
title_short	Search for resonances in diphoton events at √s=13 TeV with the ATLAS detector
title_full	Search for resonances in diphoton events at √s=13 TeV with the ATLAS detector
title_fullStr	Search for resonances in diphoton events at √s=13 TeV with the ATLAS detector
title_full_unstemmed	Search for resonances in diphoton events at √s=13 TeV with the ATLAS detector
title_sort	search for resonances in diphoton events at √s=13 tev with the atlas detector
url	http://hdl.handle.net/20.500.12110/paper_11266708_v2016_n9_p_TheATLAScollaboration
work_keys_str_mv	AT theatlascollaboration searchforresonancesindiphotoneventsats13tevwiththeatlasdetector
_version_	1782028675559981056

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

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