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Energy and system size dependence of phi meson production in Cu plus Cu and Au plus Au collisions

Result description

We study the beam-energy and system-size dependence of phi meson production (using the hadronic decay mode phi -> K+ K-) by comparing the new results from Cu + Cu collisions and previously reported Au + Au collisions at root s(NN) = 62.4 and 200 GeV measured in the STAR experiment at RHIC. Data presented in this Letter are from mid-rapidity (vertical bar y vertical bar < 0.5) for 0.4 < p(T) < 5 GeV/c. At a given beam energy, the transverse momentum distributions for phi mesons are observed to be similarin yield and shape for Cu + Cu and Au + Au colliding systems with similar average numbers of participating nucleons. The phi meson yields in nucleus-nucleus collisions, normalized by the average number of participating nucleons, are found to be enhancedrelative to those from p + p collisions. The enhancement for phi mesons lies between strange hadrons having net strangeness = 1 (K- and <(A)over bar>) and net strangeness = 2 (Xi).

Keywords

particle productionstrangeness enhancementcanonical suppression

The result's identifiers

Alternative languages

  • Result language

    angličtina

  • Original language name

    Energy and system size dependence of phi meson production in Cu plus Cu and Au plus Au collisions

  • Original language description

    We study the beam-energy and system-size dependence of phi meson production (using the hadronic decay mode phi -> K+ K-) by comparing the new results from Cu + Cu collisions and previously reported Au + Au collisions at root s(NN) = 62.4 and 200 GeV measured in the STAR experiment at RHIC. Data presented in this Letter are from mid-rapidity (vertical bar y vertical bar < 0.5) for 0.4 < p(T) < 5 GeV/c. At a given beam energy, the transverse momentum distributions for phi mesons are observed to be similarin yield and shape for Cu + Cu and Au + Au colliding systems with similar average numbers of participating nucleons. The phi meson yields in nucleus-nucleus collisions, normalized by the average number of participating nucleons, are found to be enhancedrelative to those from p + p collisions. The enhancement for phi mesons lies between strange hadrons having net strangeness = 1 (K- and <(A)over bar>) and net strangeness = 2 (Xi).

  • Czech name

  • Czech description

Classification

  • Type

    Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    BG - Nuclear, atomic and molecular physics, accelerators

  • OECD FORD branch

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2009

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Physics Letters. B

  • ISSN

    0370-2693

  • e-ISSN

  • Volume of the periodical

    673

  • Issue of the periodical within the volume

    3

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    9

  • Pages from-to

  • UT code for WoS article

    000264790700003

  • EID of the result in the Scopus database

Result type

Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

Jx

CEP

BG - Nuclear, atomic and molecular physics, accelerators

Year of implementation

2009