Partonic Flow and {phi}-Meson Production in Au+Au Collisions at {radical}(s{sub NN})=200 GeV
- University of Illinois at Chicago, Chicago, Illinois 60607 (United States)
- Panjab University, Chandigarh 160014 (India)
- Variable Energy Cyclotron Centre, Kolkata 700064 (India)
We present first measurements of the {phi}-meson elliptic flow (v{sub 2}(p{sub T})) and high-statistics p{sub T} distributions for different centralities from {radical}(s{sub NN})=200 GeV Au+Au collisions at RHIC. In minimum bias collisions the v{sub 2} of the {phi} meson is consistent with the trend observed for mesons. The ratio of the yields of the {omega} to those of the {phi} as a function of transverse momentum is consistent with a model based on the recombination of thermal s quarks up to p{sub T}{approx}4 GeV/c, but disagrees at higher momenta. The nuclear modification factor (R{sub CP}) of {phi} follows the trend observed in the K{sub S}{sup 0} mesons rather than in {lambda} baryons, supporting baryon-meson scaling. These data are consistent with {phi} 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.
- OSTI ID:
- 21028210
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 11 Vol. 99; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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