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Measurement of the higher-order anisotropic flow coefficients for identified hadrons in Au + Au collisions at $$sqrt{s_{NN}}$$ = 200 GeV

$$sqrt{s_{NN}}$$=200GeVでの金+金衝突におけるハドロンの異方的フローの高次項の測定

Adare, A.*; 今井 憲一; 永宮 正治; 谷田 聖; PHENIX Collaboration*; 他385名*

Adare, A.*; Imai, Kenichi; Nagamiya, Shoji; Tanida, Kiyoshi; PHENIX Collaboration*; 385 of others*

Measurements of the anisotropic flow coefficients $$v_2{Psi_2 }$$, $$v_3{Psi_3 }$$, $$v_4{Psi_4 }$$, and $$v_4{Psi_2 }$$, for identified particles ($$pi^{pm}$$, $$K^{pm}$$, and $$p+bar{p}$$) at midrapidity, obtained relative to the event planes $$Psi_m$$ at forward rapidities in Au + Au collisions at $$sqrt{s_{NN}} =$$ 200 GeV, are presented as a function of collision centrality and particle transverse momenta $$p_T$$. The $$vn$$ coefficients show characteristic patterns consistent with hydrodynamical expansion of the matter produced in the collisions. For each harmonic $$n$$, a modified valence quark-number $$N_q$$ scaling [plotting $$v_n{Psi_m}/(N_q)^{n/2}$$ versus transverse kinetic energies $$(KE_{T})/N_q$$] is observed to yield a single curve for all the measured particle species for a broad range of $$KE_{T}$$. A simultaneous blast-wave model fit to the observed $$v_n{Psi_m}/(p_T)$$ coefficients and published particle spectra identifies radial flow anisotropies $$rho_n{Psi_m}$$ and spatial eccentricities $$s_n{Psi_m}$$ at freeze-out. These are generally smaller than the initial-state participant-plane geometric eccentricities $$epsilon_n{Psi_m^{PP}}$$ as also observed in the final eccentricity from quantum interferometry measurements with respect to the event plane.

使用言語

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English

掲載資料名

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Physical Review C

巻

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93

号

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5

ページ数

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p.051902_1 - 051902_8

発行年月

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2016/05

出版社名

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American Physical Society

発表会議名

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開催年月

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開催都市

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開催国

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キーワード

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相対論的重イオン衝突; クォーク物質

特許データ

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PDF

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AA2016-0390.pdf:0.48MB

論文URL

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https://doi.org/10.1103/PhysRevC.93.051902

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使用施設

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広報プレスリリース

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論文解説記事
(成果普及情報誌)

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受委託・共同研究相手機関

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Brookhaven National Laboratory

Access

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- Accesses

InCites™

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パーセンタイル：5.92

分野：Physics, Nuclear

Altmetrics

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