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

Scientific paper - Original scientific paper

• Author: B. I. Abelev
• Author: ...
• Author: Mirko Planinić
• Author: ...
• Author: Nikola Poljak
• Author: ...
• Author: J. X. Zuo
• Collaboration: STAR Collaboration
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

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.

• Keywords (english): 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
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review Letters
• Numbering: vol. 99, no. 11, 112301
• p-ISSN: 0031-9007
• e-ISSN: 1079-7114
• DOI: https://doi.org/10.1103/PhysRevLett.99.112301
• URN:NBN: urn:nbn:hr:217:335743
• Publication: 2007
• Project: Number: 119-0982887-1006; Title (croatian): Istraživanje hadronskih sustava upotrebom relativističkih projektila; Leader: Mirko Planinić; Jurisdiction: Croatia; Funding stream: ZP
• Document URL: http://link.aps.org/doi/10.1103/PhysRevLett.99.112301
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (2007) by the American Physical Society. Received 20 March 2007; published 11 September 2007.
• Created on: 2019-10-18 15:08:26