Partonic Flow and ϕ-Meson Production in Au+Au Collisions at √sNN=200  GeV

Abelev, B. I. and Planinić, Mirko and Poljak, Nikola and Zuo, J. X. (STAR Collaboration) (2007) Partonic Flow and ϕ-Meson Production in Au+Au Collisions at √sNN=200  GeV. Physical Review Letters, 99 (11). pp. 112301-6. ISSN 0031-9007

[img]
Preview
PDF - Published Version
Language: English

Download (302kB) | Preview

Abstract

We present first measurements of the ϕ-meson elliptic flow (v_2(p_T)) and high-statistics p_T distributions for different centralities from √sNN=200  GeV Au+Au collisions at RHIC. In minimum bias collisions the v_2 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 p_T∼4  GeV/c, but disagrees at higher momenta. The nuclear modification factor (R_CP) of ϕ follows the trend observed in the K^0_S 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.

Item Type: Article
Keywords: nucleus nucleus, colliding beams scattering, heavy ion gold Phi(1020), hadroproduction Phi(1020), hadronic decay mass spectrum, (K+ K-) elliptic flow transverse momentum, spectra impact parameter, dependence yield, (Omega- Phi(1020)) parton, collective phenomena parton, recombination magnetic detector, STAR experimental results Brookhaven RHIC Coll 200 GeV-cms/nucleon
Date: September 2007
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2007) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-0982887-1006
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 01 Jul 2014 11:02
Last Modified: 01 Jul 2014 11:02
URI: http://digre.pmf.unizg.hr/id/eprint/2351

Actions (login required)

View Item View Item