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Beam Energy Dependence of Moments of the Net-Charge Multiplicity Distributions in Au plus Au Collisions at RHIC

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    SYSNO ASEP0433612
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleBeam Energy Dependence of Moments of the Net-Charge Multiplicity Distributions in Au plus Au Collisions at RHIC
    Author(s) Adamczyk, L. (PL)
    Adkins, J. K. (US)
    Agakishiev, G. (RU)
    Aggarwal, M. M. (IN)
    Ahammed, Z. (IN)
    Alekseev, I. (RU)
    Alford, J. (US)
    Anson, C. (US)
    Aparin, A. A. (RU)
    Arkhipkin, D. (US)
    Barnovská, Zuzana (UJF-V)
    Bielčík, J. (CZ)
    Bielčíková, Jana (UJF-V) RID, ORCID, SAI
    Chaloupka, P. (CZ)
    Hajková, O. (CZ)
    Pachr, M. (CZ)
    Rusňák, Jan (UJF-V) RID, ORCID, SAI
    Šumbera, Michal (UJF-V) RID, ORCID, SAI
    Tlustý, David (UJF-V)
    Vértési, Robert (UJF-V)
    Number of authors357
    Source TitlePhysical Review Letters. - : American Physical Society - ISSN 0031-9007
    Roč. 113, č. 9 (2014), 092301
    Number of pages7 s.
    Publication formPrint - P
    Languageeng - English
    CountryUS - United States
    KeywordsSTAR ; QCD
    Subject RIVBG - Nuclear, Atomic and Molecular Physics, Colliders
    R&D ProjectsGA13-20841S GA ČR - Czech Science Foundation (CSF)
    LA09013 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
    Institutional supportUJF-V - RVO:61389005
    UT WOS000341301800002
    DOI https://doi.org/10.1103/PhysRevLett.113.092301
    AnnotationWe report the first measurements of the moments-mean (M), variance (sigma(2)), skewness (S), and kurtosis (kappa)-of the net-charge multiplicity distributions at midrapidity in Au + Au collisions at seven energies, ranging from root s(NN) = 7.7 to 200 GeV, as a part of the Beam Energy Scan program at RHIC. The moments are related to the thermodynamic susceptibilities of net charge, and are sensitive to the location of the QCD critical point. We compare the products of the moments, sigma(2)/M, S sigma, and kappa sigma(2), with the expectations from Poisson and negative binomial distributions (NBDs). The S sigma values deviate from the Poisson baseline and are close to the NBD baseline, while the kappa sigma(2) values tend to lie between the two. Within the present uncertainties, our data do not show nonmonotonic behavior as a function of collision energy. These measurements provide a valuable tool to extract the freeze-out parameters in heavy-ion collisions by comparing with theoretical models.
    WorkplaceNuclear Physics Institute
    ContactMarkéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228
    Year of Publishing2015
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