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phi meson production in Au + Au and p + p collisions at root S-NN=200 GeV

Result description

We report the STAR measurement of phi meson production in Au + Au and p + p collisions at root s(NN) = 200 GeV. Using the event mixing technique, the phi spectra and yields are obtained at mid-rapidity for five centrality bins in Au + Au collisions and for non-singly-diffractive p + p collisions. It is found that the phi transverse momentum distributions from Au + An collisions are better fitted with a single-exponential while the p + p spectrum is better described by a double-exponential distribution.The measured nuclear modification factors indicate that phi production in central An + An collisions is suppressed relative to peripheral collisions when scaled by the number of binary collisions (< N-bin>). The systematics of < p(t)> versus centrality and the constant phi/K- ratio versus beam species, centrality, and collision energy rule out kaon coalescence as the dominant mechanism for phi production.

Keywords

phi mezonAu+Aup+p

The result's identifiers

Alternative languages

  • Result language

    angličtina

  • Original language name

    phi meson production in Au + Au and p + p collisions at root S-NN=200 GeV

  • Original language description

    We report the STAR measurement of phi meson production in Au + Au and p + p collisions at root s(NN) = 200 GeV. Using the event mixing technique, the phi spectra and yields are obtained at mid-rapidity for five centrality bins in Au + Au collisions and for non-singly-diffractive p + p collisions. It is found that the phi transverse momentum distributions from Au + An collisions are better fitted with a single-exponential while the p + p spectrum is better described by a double-exponential distribution.The measured nuclear modification factors indicate that phi production in central An + An collisions is suppressed relative to peripheral collisions when scaled by the number of binary collisions (< N-bin>). The systematics of < p(t)> versus centrality and the constant phi/K- ratio versus beam species, centrality, and collision energy rule out kaon coalescence as the dominant mechanism for phi production.

  • Czech name

    Produkce mezonů phi ve srážkách Au+Au a p+p při root S-NN=200 GeV

  • Czech description

    Produkce mezonů phi ve srážkách Au+Au a p+p při root S-NN=200 GeV.

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

Others

  • Publication year

    2005

  • 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

    612

  • Issue of the periodical within the volume

    3-4

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    9

  • Pages from-to

    181-189

  • UT code for WoS article

  • EID of the result in the Scopus database

Basic information

Result type

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

Jx

CEP

BG - Nuclear, atomic and molecular physics, accelerators

Year of implementation

2005