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Observation of light-by-light scattering in heavy-ion collisions with the ATLAS detector at the LHC

Observation of light-by-light scattering in heavy-ion collisions with the ATLAS detector at the LHC is carried out with data collected by ATLAS detector in 2015 and 2018 corresponding to a total luminosity of 2.2$\mathrm{nb}^{-1}$. The number of event observed is given and the fiducial and different...

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Autor principal: Hamdaoui, Hassane
Lenguaje:eng
Publicado: 2021
Materias:
Acceso en línea:http://cds.cern.ch/record/2752826
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author Hamdaoui, Hassane
author_facet Hamdaoui, Hassane
author_sort Hamdaoui, Hassane
collection CERN
description Observation of light-by-light scattering in heavy-ion collisions with the ATLAS detector at the LHC is carried out with data collected by ATLAS detector in 2015 and 2018 corresponding to a total luminosity of 2.2$\mathrm{nb}^{-1}$. The number of event observed is given and the fiducial and differential cross section are calculated. The measured diphoton invariant mass distribution is used to search for axion-like particles and set new exclusion limits on their production assuming 100\% decay to photons. The technical part of this thesis is dedicated to the tuning of argon emulation in the simulation of Transition Radiation Tracker (TRT) which was carried out by testing multiple parameters to decide the best one to be used for emulation argon from xenon without carrying out a full simulation which is time, CPU and disk space consuming.
id cern-2752826
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2021
record_format invenio
spelling cern-27528262021-04-23T09:50:28Zhttp://cds.cern.ch/record/2752826engHamdaoui, HassaneObservation of light-by-light scattering in heavy-ion collisions with the ATLAS detector at the LHCParticle Physics - ExperimentDetectors and Experimental TechniquesObservation of light-by-light scattering in heavy-ion collisions with the ATLAS detector at the LHC is carried out with data collected by ATLAS detector in 2015 and 2018 corresponding to a total luminosity of 2.2$\mathrm{nb}^{-1}$. The number of event observed is given and the fiducial and differential cross section are calculated. The measured diphoton invariant mass distribution is used to search for axion-like particles and set new exclusion limits on their production assuming 100\% decay to photons. The technical part of this thesis is dedicated to the tuning of argon emulation in the simulation of Transition Radiation Tracker (TRT) which was carried out by testing multiple parameters to decide the best one to be used for emulation argon from xenon without carrying out a full simulation which is time, CPU and disk space consuming.CERN-THESIS-2021-006oai:cds.cern.ch:27528262021-02-22T21:16:01Z
spellingShingle Particle Physics - Experiment
Detectors and Experimental Techniques
Hamdaoui, Hassane
Observation of light-by-light scattering in heavy-ion collisions with the ATLAS detector at the LHC
title Observation of light-by-light scattering in heavy-ion collisions with the ATLAS detector at the LHC
title_full Observation of light-by-light scattering in heavy-ion collisions with the ATLAS detector at the LHC
title_fullStr Observation of light-by-light scattering in heavy-ion collisions with the ATLAS detector at the LHC
title_full_unstemmed Observation of light-by-light scattering in heavy-ion collisions with the ATLAS detector at the LHC
title_short Observation of light-by-light scattering in heavy-ion collisions with the ATLAS detector at the LHC
title_sort observation of light-by-light scattering in heavy-ion collisions with the atlas detector at the lhc
topic Particle Physics - Experiment
Detectors and Experimental Techniques
url http://cds.cern.ch/record/2752826
work_keys_str_mv AT hamdaouihassane observationoflightbylightscatteringinheavyioncollisionswiththeatlasdetectoratthelhc