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Charge fluctuations in Pb--Pb collisions at $\sqrt{s_{NN}} = $2.76 TeV measured by ALICE experiment

Charge fluctuations provide a possible signature for the existence of the de-confined Quark Gluon Plasma phase (QGP). Being sensitive to the square of the charges, fluctuations in QGP, with fractionally charged partons, are significantly different from those of a hadron gas with unit charged particl...

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Autor principal: Jena, Satyajit
Lenguaje:eng
Publicado: 2012
Materias:
Acceso en línea:https://dx.doi.org/10.22323/1.154.0046
http://cds.cern.ch/record/1429120
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author Jena, Satyajit
author_facet Jena, Satyajit
author_sort Jena, Satyajit
collection CERN
description Charge fluctuations provide a possible signature for the existence of the de-confined Quark Gluon Plasma phase (QGP). Being sensitive to the square of the charges, fluctuations in QGP, with fractionally charged partons, are significantly different from those of a hadron gas with unit charged particles. Studies of charge fluctuations have been carried out using the variable, $\nu_{(+-,dyn)}$ which, by its construction, is free from collisional bias (impact parameter fluctuations and fluctuations from the finite number of charged particles within the detector acceptance). The dependence of charge fluctuations on the pseudo--rapidity windows for various centrality bins is analyzed for Pb--Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV in the ALICE experiment at CERN-LHC. A scaling behavior is observed as a function of increasing pseudo-rapidity window for the charge fluctuations, expressed in terms of \nchnudyn, where $N_{ch}$ is the number of charged particles. The results are compared to experimental measurements at lower energies and to model predictions.
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institution Organización Europea para la Investigación Nuclear
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publishDate 2012
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spelling cern-14291202021-07-31T02:04:04Zdoi:10.22323/1.154.0046http://cds.cern.ch/record/1429120engJena, SatyajitCharge fluctuations in Pb--Pb collisions at $\sqrt{s_{NN}} = $2.76 TeV measured by ALICE experimentNuclear Physics - ExperimentCharge fluctuations provide a possible signature for the existence of the de-confined Quark Gluon Plasma phase (QGP). Being sensitive to the square of the charges, fluctuations in QGP, with fractionally charged partons, are significantly different from those of a hadron gas with unit charged particles. Studies of charge fluctuations have been carried out using the variable, $\nu_{(+-,dyn)}$ which, by its construction, is free from collisional bias (impact parameter fluctuations and fluctuations from the finite number of charged particles within the detector acceptance). The dependence of charge fluctuations on the pseudo--rapidity windows for various centrality bins is analyzed for Pb--Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV in the ALICE experiment at CERN-LHC. A scaling behavior is observed as a function of increasing pseudo-rapidity window for the charge fluctuations, expressed in terms of \nchnudyn, where $N_{ch}$ is the number of charged particles. The results are compared to experimental measurements at lower energies and to model predictions.Charge fluctuations provide a possible signature for the existence of the de-confined Quark Gluon Plasma phase (QGP). Being sensitive to the square of the charges, fluctuations in QGP, with fractionally charged partons, are significantly different from those of a hadron gas with unit charged particles. Studies of charge fluctuations have been carried out using the variable, $\nu_{(+-,dyn)}$ which, by its construction, is free from collisional bias (impact parameter fluctuations and fluctuations from the finite number of charged particles within the detector acceptance). The dependence of charge fluctuations on the pseudo--rapidity windows for various centrality bins is analyzed for Pb--Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV in the ALICE experiment at CERN-LHC. A scaling behavior is observed as a function of increasing pseudo-rapidity window for the charge fluctuations, expressed in terms of \nchnudyn, where $N_{ch}$ is the number of charged particles. The results are compared to experimental measurements at lower energies and to model predictions.arXiv:1203.0542oai:cds.cern.ch:14291202012-03-05
spellingShingle Nuclear Physics - Experiment
Jena, Satyajit
Charge fluctuations in Pb--Pb collisions at $\sqrt{s_{NN}} = $2.76 TeV measured by ALICE experiment
title Charge fluctuations in Pb--Pb collisions at $\sqrt{s_{NN}} = $2.76 TeV measured by ALICE experiment
title_full Charge fluctuations in Pb--Pb collisions at $\sqrt{s_{NN}} = $2.76 TeV measured by ALICE experiment
title_fullStr Charge fluctuations in Pb--Pb collisions at $\sqrt{s_{NN}} = $2.76 TeV measured by ALICE experiment
title_full_unstemmed Charge fluctuations in Pb--Pb collisions at $\sqrt{s_{NN}} = $2.76 TeV measured by ALICE experiment
title_short Charge fluctuations in Pb--Pb collisions at $\sqrt{s_{NN}} = $2.76 TeV measured by ALICE experiment
title_sort charge fluctuations in pb--pb collisions at $\sqrt{s_{nn}} = $2.76 tev measured by alice experiment
topic Nuclear Physics - Experiment
url https://dx.doi.org/10.22323/1.154.0046
http://cds.cern.ch/record/1429120
work_keys_str_mv AT jenasatyajit chargefluctuationsinpbpbcollisionsatsqrtsnn276tevmeasuredbyaliceexperiment