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          Institute: MPI für Physik     Collection: YB 2016     Display Documents



ID: 715979.0, MPI für Physik / YB 2016
Phase-Space Dependence of Particle-Ratio Fluctuations in Pb+Pb Collisions from 20A to 158A GeV Beam Energy
Authors:NA49 Collaboration; Anticic, T.; Schmitz, N.; Seyboth, P.; et al.
Date of Publication (YYYY-MM-DD):2014
Title of Journal:Physical Review C
Journal Abbrev.:Phys.Rev.C
Issue / Number:89
Start Page:054902
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:A novel approach, the identity method, was used for particle identification and the study of fluctuations of particle yield ratios in Pb+Pb collisions at the CERN Super Proton Synchrotron (SPS). This procedure allows to unfold the moments of the unknown multiplicity distributions of protons (p), kaons (K), pions (pi) and electrons (e). Using these moments the excitation function of the fluctuation measure nu_{dyn}[A,B] was measured, with A and B denoting different particle types. The obtained energy dependence of nu_{dyn} agrees with previously published NA49 results on the related measure sigma_{dyn}. Moreover, nu_{dyn} was found to depend on the phase space coverage for [K,p] and [K, pi] pairs. This feature most likely explains the reported differences between measurements of NA49 and those of STAR in central Au+Au collisions.
Classification / Thesaurus:NA49
External Publication Status:published
Document Type:Article
Communicated by:MPI für Physik
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2014-790
URL:http://inspirehep.net/search?p=find+eprint+1310.34...
URL:http://arXiv.org/abs/arxiv:1310.3428
URL:https://publications.mppmu.mpg.de/?action=search&m...
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