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    題名: Nuclear dependence of transverse momentum distributions for Drell-Yan, J/ Ψ , and Ψ ' production in p+p collisions at sqrt(s) =15.5 GeV
    Nuclear dependence of transverse momentum distributions for Drell-Yan, J/ Ψ , and Ψ ' production in p+p collisions at sqrt(s) =15.5 GeV
    Authors: 王素音
    Wang, SuYin Grass
    貢獻者: 郭榮升;章文箴
    Rurng-Sheng Kuo;Wen-Chen Chang
    Keywords: 費米實驗室
    Jpsi;Psi';Drell-Yan;SeaQuest;pT
    Date: 2016-01-30
    Issue Date: 2016-12-26 15:36:36 (UTC+8)
    Abstract: The suppression of J/�Z and �Z' production due to the plasmas screening of strong interaction has been considered as one of the important signatures of the formation of quark-gluon-plasma in the nucleus-nucleus collisions. In order to establish the baseline of similar suppression effect caused by the cold nuclear matter, the measurement of nuclear dependence of transverse momentum spectrum of J/�Z, �Z' and Drell-Yan production in the proton-nucleus collisions is essential. Other than understanding the absorption of charmonium in the nuclear medium, it also provides valuable information of production mechanisms for J/�Z and �Z' and the interaction of fast-moving partons with the nuclear medium before the hard collisions. We performed such measurement in SeaQuest E906 experiment at Fermilab with 120-GeV proton beams. By comparison with the results of similar measurement by E772 and E866 with 800-GeV proton beams, we observe no change in the production and absorption of J/�Z and �Z' and slightly stronger initial-state interaction for quarks with nuclear medium at low energies.
    The suppression of J/�Z and �Z' production due to the plasmas screening of strong interaction has been considered as one of the important signatures of the formation of quark-gluon-plasma in the nucleus-nucleus collisions. In order to establish the baseline of similar suppression effect caused by the cold nuclear matter, the measurement of nuclear dependence of transverse momentum spectrum of J/�Z, �Z' and Drell-Yan production in the proton-nucleus collisions is essential. Other than understanding the absorption of charmonium in the nuclear medium, it also provides valuable information of production mechanisms for J/�Z and �Z' and the interaction of fast-moving partons with the nuclear medium before the hard collisions. We performed such measurement in SeaQuest E906 experiment at Fermilab with 120-GeV proton beams. By comparison with the results of similar measurement by E772 and E866 with 800-GeV proton beams, we observe no change in the production and absorption of J/�Z and �Z' and slightly stronger initial-state interaction for quarks with nuclear medium at low energies.
    Appears in Collections:[物理學系] 博碩士論文
    [物理系] 郭榮升
    [物理系] 章文箴

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