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Search for diphoton resonances in the 66 to 110 GeV mass range using 140 fb$^{-1}$ of 13 TeV $pp$ collisions collected with the ATLAS detector

Many extensions to the Higgs sector of the Standard Model motivate additional spin-0 bosons. This search focuses on light, spin-0 bosons decaying to two photons in the 66 to 110 GeV mass range, using 140 fb$^{-1}$ of $pp$ collisions produced by the Large Hadron Collider and collected by the ATLAS de...

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Autor principal: The ATLAS collaboration
Lenguaje:eng
Publicado: 2023
Materias:
Acceso en línea:http://cds.cern.ch/record/2862024
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author The ATLAS collaboration
author_facet The ATLAS collaboration
author_sort The ATLAS collaboration
collection CERN
description Many extensions to the Higgs sector of the Standard Model motivate additional spin-0 bosons. This search focuses on light, spin-0 bosons decaying to two photons in the 66 to 110 GeV mass range, using 140 fb$^{-1}$ of $pp$ collisions produced by the Large Hadron Collider and collected by the ATLAS detector. Multi-variate analysis techniques are used to both mitigate background processes and classify events, improving the sensitivity to physics beyond the Standard Model. Additionally, a Gaussian Process regression is used to maintain a non-dominant uncertainty on the background model. Both a model-independent search for a generic spin-0 particle and a model-dependent search for an additional low-mass Higgs boson are performed. No significant excess is observed, and an upper limit at the 95% CL is set on total (fiducial) cross-section times branching ratio from 8 to 53 fb (19 to 102 fb) for the model-independent (model-dependent) result.
id cern-2862024
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2023
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spelling cern-28620242023-06-15T18:48:17Zhttp://cds.cern.ch/record/2862024engThe ATLAS collaborationSearch for diphoton resonances in the 66 to 110 GeV mass range using 140 fb$^{-1}$ of 13 TeV $pp$ collisions collected with the ATLAS detectorParticle Physics - ExperimentMany extensions to the Higgs sector of the Standard Model motivate additional spin-0 bosons. This search focuses on light, spin-0 bosons decaying to two photons in the 66 to 110 GeV mass range, using 140 fb$^{-1}$ of $pp$ collisions produced by the Large Hadron Collider and collected by the ATLAS detector. Multi-variate analysis techniques are used to both mitigate background processes and classify events, improving the sensitivity to physics beyond the Standard Model. Additionally, a Gaussian Process regression is used to maintain a non-dominant uncertainty on the background model. Both a model-independent search for a generic spin-0 particle and a model-dependent search for an additional low-mass Higgs boson are performed. No significant excess is observed, and an upper limit at the 95% CL is set on total (fiducial) cross-section times branching ratio from 8 to 53 fb (19 to 102 fb) for the model-independent (model-dependent) result.ATLAS-CONF-2023-035oai:cds.cern.ch:28620242023-06-15
spellingShingle Particle Physics - Experiment
The ATLAS collaboration
Search for diphoton resonances in the 66 to 110 GeV mass range using 140 fb$^{-1}$ of 13 TeV $pp$ collisions collected with the ATLAS detector
title Search for diphoton resonances in the 66 to 110 GeV mass range using 140 fb$^{-1}$ of 13 TeV $pp$ collisions collected with the ATLAS detector
title_full Search for diphoton resonances in the 66 to 110 GeV mass range using 140 fb$^{-1}$ of 13 TeV $pp$ collisions collected with the ATLAS detector
title_fullStr Search for diphoton resonances in the 66 to 110 GeV mass range using 140 fb$^{-1}$ of 13 TeV $pp$ collisions collected with the ATLAS detector
title_full_unstemmed Search for diphoton resonances in the 66 to 110 GeV mass range using 140 fb$^{-1}$ of 13 TeV $pp$ collisions collected with the ATLAS detector
title_short Search for diphoton resonances in the 66 to 110 GeV mass range using 140 fb$^{-1}$ of 13 TeV $pp$ collisions collected with the ATLAS detector
title_sort search for diphoton resonances in the 66 to 110 gev mass range using 140 fb$^{-1}$ of 13 tev $pp$ collisions collected with the atlas detector
topic Particle Physics - Experiment
url http://cds.cern.ch/record/2862024
work_keys_str_mv AT theatlascollaboration searchfordiphotonresonancesinthe66to110gevmassrangeusing140fb1of13tevppcollisionscollectedwiththeatlasdetector