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          Institute: MPI für Physik     Collection: YB 2016     Display Documents

ID: 716322.0, MPI für Physik / YB 2016
Measurement of Event-by-event Transverse Momentum and Multiplicity Fluctuations Using Strongly Intensive Measures Δ[P_T ,N] and Σ[P_T ,N] in Nucleus-nucleus Collisions at the CERN Super Proton Synchrotron
Authors:NA49 Collaboration; Anticic, T.; Schmitz, N.; Seyboth, P.; et al.
Date of Publication (YYYY-MM-DD):2015
Title of Journal:Physical Review C
Journal Abbrev.:Phys.Rev.C
Issue / Number:92
Start Page:044905
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:Results from the NA49 experiment at the CERN Super Proton Synchrotron (SPS) are presented on event-by-event transverse momentum and multiplicity fluctuations of charged particles, produced at forward rapidities in central Pb + Pb interactions at beam momenta 20A, 30A, 40A, 80A, and 158A GeV/c, as well as in systems of different sizes (p+p, C + C, Si + Si, and Pb + Pb) at 158A GeV/c. This publication extends the previous NA49 measurements of the strongly intensive measure ΦpT by a study of the recently proposed strongly intensive measures of fluctuations Δ[PT,N] and Σ[PT,N]. In the explored kinematic region transverse momentum and multiplicity fluctuations show no significant energy dependence in the SPS energy range. However, a remarkable system size dependence is observed for both Δ[PT,N] and Σ[PT,N], with the largest values measured in peripheral Pb + Pb interactions. The results are compared with NA61/SHINE (SPS Heavy Ion and Neutrino Experiment) measurements in p+p collisions, as well as with predictions of The Ultrarelativistic Quantum Molecular Dynamics and EPOS models.
Classification / Thesaurus:NA49
Comment of the Author/Creator:7 pages, 3 figures
External Publication Status:published
Document Type:Article
Communicated by:MPI für Physik
Affiliations:MPI für Physik
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