Partonic flow and ϕ-meson production in Au+Au collisions at VsNN=200 = GeV

Y. Bai; F. Benedosso; M.A.J. Botje; O. Grebenyuk; A. Mischke; T. Peitzmann; M.J. Russcher; R.J.M. Snellings; N. van der Kolk

Partonic flow and ϕ-meson production in Au+Au collisions at VsNN=200 = GeV

Y. Bai, F. Benedosso, M.A.J. Botje, O. Grebenyuk, A. Mischke, T. Peitzmann, M.J. Russcher, R.J.M. Snellings, N. van der Kolk

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Abstract

We present first measurements of the ϕ-meson elliptic flow (v2(pT)) and high-statistics pT distributions for different centralities from √sNN=200 GeV Au+Au collisions at RHIC. In minimum bias collisions the v2 of the ϕ meson is consistent with the trend observed for mesons. The ratio of the yields of the Ω to those of the ϕ as a function of transverse momentum is consistent with a model based on the recombination of thermal s quarks up to pT∼4 GeV/c, but disagrees at higher momenta. The nuclear modification factor (RCP) of ϕ follows the trend observed in the KS0 mesons rather than in Λ baryons, supporting baryon-meson scaling. These data are consistent with ϕ mesons in central Au+Au collisions being created via coalescence of thermalized s quarks and the formation of a hot and dense matter with partonic collectivity at RHIC.

Original language	Undefined/Unknown
Pages (from-to)	112301/1-112301/6
Number of pages	6
Journal	Physical Review Letters
Volume	99
Issue number	11
Publication status	Published - 2007

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STAR Collaboration

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Cite this

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title = "Partonic flow and ϕ-meson production in Au+Au collisions at VsNN=200 = GeV",

abstract = "We present first measurements of the ϕ-meson elliptic flow (v2(pT)) and high-statistics pT distributions for different centralities from √sNN=200 GeV Au+Au collisions at RHIC. In minimum bias collisions the v2 of the ϕ meson is consistent with the trend observed for mesons. The ratio of the yields of the Ω to those of the ϕ as a function of transverse momentum is consistent with a model based on the recombination of thermal s quarks up to pT∼4 GeV/c, but disagrees at higher momenta. The nuclear modification factor (RCP) of ϕ follows the trend observed in the KS0 mesons rather than in Λ baryons, supporting baryon-meson scaling. These data are consistent with ϕ mesons in central Au+Au collisions being created via coalescence of thermalized s quarks and the formation of a hot and dense matter with partonic collectivity at RHIC.",

author = "Y. Bai and F. Benedosso and M.A.J. Botje and O. Grebenyuk and A. Mischke and T. Peitzmann and M.J. Russcher and R.J.M. Snellings and {van der Kolk}, N.",

note = "STAR Collaboration",

year = "2007",

language = "Undefined/Unknown",

volume = "99",

pages = "112301/1--112301/6",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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TY - JOUR

T1 - Partonic flow and ϕ-meson production in Au+Au collisions at VsNN=200 = GeV

AU - Bai, Y.

AU - Benedosso, F.

AU - Botje, M.A.J.

AU - Grebenyuk, O.

AU - Mischke, A.

AU - Peitzmann, T.

AU - Russcher, M.J.

AU - Snellings, R.J.M.

AU - van der Kolk, N.

N1 - STAR Collaboration

PY - 2007

Y1 - 2007

N2 - We present first measurements of the ϕ-meson elliptic flow (v2(pT)) and high-statistics pT distributions for different centralities from √sNN=200 GeV Au+Au collisions at RHIC. In minimum bias collisions the v2 of the ϕ meson is consistent with the trend observed for mesons. The ratio of the yields of the Ω to those of the ϕ as a function of transverse momentum is consistent with a model based on the recombination of thermal s quarks up to pT∼4 GeV/c, but disagrees at higher momenta. The nuclear modification factor (RCP) of ϕ follows the trend observed in the KS0 mesons rather than in Λ baryons, supporting baryon-meson scaling. These data are consistent with ϕ mesons in central Au+Au collisions being created via coalescence of thermalized s quarks and the formation of a hot and dense matter with partonic collectivity at RHIC.

AB - We present first measurements of the ϕ-meson elliptic flow (v2(pT)) and high-statistics pT distributions for different centralities from √sNN=200 GeV Au+Au collisions at RHIC. In minimum bias collisions the v2 of the ϕ meson is consistent with the trend observed for mesons. The ratio of the yields of the Ω to those of the ϕ as a function of transverse momentum is consistent with a model based on the recombination of thermal s quarks up to pT∼4 GeV/c, but disagrees at higher momenta. The nuclear modification factor (RCP) of ϕ follows the trend observed in the KS0 mesons rather than in Λ baryons, supporting baryon-meson scaling. These data are consistent with ϕ mesons in central Au+Au collisions being created via coalescence of thermalized s quarks and the formation of a hot and dense matter with partonic collectivity at RHIC.

M3 - Article

SN - 0031-9007

VL - 99

SP - 112301/1-112301/6

JO - Physical Review Letters

JF - Physical Review Letters

IS - 11

ER -