Measurement of the centrality dependence of J/Ψ yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC

Using the ATLAS detector, a centrality-dependent suppression has been observed in the yield of J/Ψ mesons produced in the collisions of lead ions at the Large Hadron Collider. In a sample of minimum-bias lead-lead collisions at a nucleon-nucleon centre of mass energy sNN=2.76 TeV, corresponding to a...

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Autor principal: Multitudinario:3051
Formato: JOUR
Materias:
ATLAS
Centrality dependence
Heavy ions
J/Ψ
LHC
Z boson
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03702693_v697_n4_p294_Multitudinario
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03702693_v697_n4_p294_Multitudinario
record_format dspace
spelling todo:paper_03702693_v697_n4_p294_Multitudinario2023-10-03T15:29:06Z Measurement of the centrality dependence of J/Ψ yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC Multitudinario:3051 ATLAS Centrality dependence Heavy ions J/Ψ LHC Z boson Using the ATLAS detector, a centrality-dependent suppression has been observed in the yield of J/Ψ mesons produced in the collisions of lead ions at the Large Hadron Collider. In a sample of minimum-bias lead-lead collisions at a nucleon-nucleon centre of mass energy sNN=2.76 TeV, corresponding to an integrated luminosity of about 6.7 μb -1 , J/Ψ mesons are reconstructed via their decays to μ + μ - pairs. The measured J/Ψ yield, normalized to the number of binary nucleon-nucleon collisions, is found to significantly decrease from peripheral to central collisions. The centrality dependence is found to be qualitatively similar to the trends observed at previous, lower energy experiments. The same sample is used to reconstruct Z bosons in the μ + μ - final state, and a total of 38 candidates are selected in the mass window of 66 to 116 GeV. The relative Z yields as a function of centrality are also presented, although no conclusion can be inferred about their scaling with the number of binary collisions, because of limited statistics. This analysis provides the first results on J/Ψ and Z production in lead-lead collisions at the LHC. © 2011 CERN. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03702693_v697_n4_p294_Multitudinario
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic ATLAS
Centrality dependence
Heavy ions
J/Ψ
LHC
Z boson
spellingShingle ATLAS
Centrality dependence
Heavy ions
J/Ψ
LHC
Z boson
Multitudinario:3051
Measurement of the centrality dependence of J/Ψ yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC
topic_facet ATLAS
Centrality dependence
Heavy ions
J/Ψ
LHC
Z boson
description Using the ATLAS detector, a centrality-dependent suppression has been observed in the yield of J/Ψ mesons produced in the collisions of lead ions at the Large Hadron Collider. In a sample of minimum-bias lead-lead collisions at a nucleon-nucleon centre of mass energy sNN=2.76 TeV, corresponding to an integrated luminosity of about 6.7 μb -1 , J/Ψ mesons are reconstructed via their decays to μ + μ - pairs. The measured J/Ψ yield, normalized to the number of binary nucleon-nucleon collisions, is found to significantly decrease from peripheral to central collisions. The centrality dependence is found to be qualitatively similar to the trends observed at previous, lower energy experiments. The same sample is used to reconstruct Z bosons in the μ + μ - final state, and a total of 38 candidates are selected in the mass window of 66 to 116 GeV. The relative Z yields as a function of centrality are also presented, although no conclusion can be inferred about their scaling with the number of binary collisions, because of limited statistics. This analysis provides the first results on J/Ψ and Z production in lead-lead collisions at the LHC. © 2011 CERN.
format JOUR
author Multitudinario:3051
author_facet Multitudinario:3051
author_sort Multitudinario:3051
title Measurement of the centrality dependence of J/Ψ yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC
title_short Measurement of the centrality dependence of J/Ψ yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC
title_full Measurement of the centrality dependence of J/Ψ yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC
title_fullStr Measurement of the centrality dependence of J/Ψ yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC
title_full_unstemmed Measurement of the centrality dependence of J/Ψ yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC
title_sort measurement of the centrality dependence of j/ψ yields and observation of z production in lead-lead collisions with the atlas detector at the lhc
url http://hdl.handle.net/20.500.12110/paper_03702693_v697_n4_p294_Multitudinario
work_keys_str_mv AT multitudinario3051 measurementofthecentralitydependenceofjpsyieldsandobservationofzproductioninleadleadcollisionswiththeatlasdetectoratthelhc
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