Cargando…

Centrality and jet performance in p+Pb collisions at 5.02 TeV with the ATLAS detector at the LHC

Controlling the geometry of proton-nucleus collisions is an essential aspect of testing whether the observed production of hard and soft particles deviates from a simple scaling with the number of collisions. Traditionally, a wounded nucleon model in which the distribution of a bulk observable scale...

Descripción completa

Detalles Bibliográficos
Autor principal: Perepelitsa, D V
Lenguaje:eng
Publicado: 2013
Materias:
Acceso en línea:http://cds.cern.ch/record/1556522
_version_ 1780930500807884800
author Perepelitsa, D V
author_facet Perepelitsa, D V
author_sort Perepelitsa, D V
collection CERN
description Controlling the geometry of proton-nucleus collisions is an essential aspect of testing whether the observed production of hard and soft particles deviates from a simple scaling with the number of collisions. Traditionally, a wounded nucleon model in which the distribution of a bulk observable scales with the number of participant nucleons has been used to describe the correlation between the number of collisions and the centrality of the event. We describe the centrality determination in proton-lead collisions at sqrt(s_NN) = 5.02 TeV with the ATLAS experiment at the LHC. The class of minimum bias events seen by the ATLAS detector include contributions from diffractive and photonuclear processes, which cannot be modeled through the standard Glauber approach. These are rejected through the identification of large forward pseudorapidity gaps, which are a strong indicator of an event topology that is consistent with single and double diffractive excitation.
id cern-1556522
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2013
record_format invenio
spelling cern-15565222019-09-30T06:29:59Zhttp://cds.cern.ch/record/1556522engPerepelitsa, D VCentrality and jet performance in p+Pb collisions at 5.02 TeV with the ATLAS detector at the LHCDetectors and Experimental TechniquesControlling the geometry of proton-nucleus collisions is an essential aspect of testing whether the observed production of hard and soft particles deviates from a simple scaling with the number of collisions. Traditionally, a wounded nucleon model in which the distribution of a bulk observable scales with the number of participant nucleons has been used to describe the correlation between the number of collisions and the centrality of the event. We describe the centrality determination in proton-lead collisions at sqrt(s_NN) = 5.02 TeV with the ATLAS experiment at the LHC. The class of minimum bias events seen by the ATLAS detector include contributions from diffractive and photonuclear processes, which cannot be modeled through the standard Glauber approach. These are rejected through the identification of large forward pseudorapidity gaps, which are a strong indicator of an event topology that is consistent with single and double diffractive excitation.ATL-PHYS-SLIDE-2013-366oai:cds.cern.ch:15565222013-06-19
spellingShingle Detectors and Experimental Techniques
Perepelitsa, D V
Centrality and jet performance in p+Pb collisions at 5.02 TeV with the ATLAS detector at the LHC
title Centrality and jet performance in p+Pb collisions at 5.02 TeV with the ATLAS detector at the LHC
title_full Centrality and jet performance in p+Pb collisions at 5.02 TeV with the ATLAS detector at the LHC
title_fullStr Centrality and jet performance in p+Pb collisions at 5.02 TeV with the ATLAS detector at the LHC
title_full_unstemmed Centrality and jet performance in p+Pb collisions at 5.02 TeV with the ATLAS detector at the LHC
title_short Centrality and jet performance in p+Pb collisions at 5.02 TeV with the ATLAS detector at the LHC
title_sort centrality and jet performance in p+pb collisions at 5.02 tev with the atlas detector at the lhc
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1556522
work_keys_str_mv AT perepelitsadv centralityandjetperformanceinppbcollisionsat502tevwiththeatlasdetectoratthelhc