2003/05/10 by V. Greco, Vincenzo Greco, Che Ming Ko +3 · 18 citations
Physics and Astronomy · #Coalescence (physics) #Elliptic flow #Hadron #Heavy ion #High-Energy Particle Collisions Research #Ion #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Parton #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Quark–gluon plasma #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevc.68.034904
published as Phys.Rev. C68 (2003) 034904 · 12 pages, 11 figures
arxiv created 2003/05/10 · openalex publication_date 2003/09/05 · arxiv updated 2009/12/01 · openalex created_date 2021/04/13 · openalex updated_date 2026/08/01
Using a covariant coalescence model, we study hadron production in relativistic heavy ion collisions from both soft partons in the quark-gluon plasma and hard partons in minijets. Including transverse flow of soft partons and independent fragmentation of minijet partons, the model is able to describe available experimental data on pion, kaon, and antiproton spectra. The resulting antiproton to pion ratio is seen to increase at low transverse momenta and reaches a value of about 1 at intermediate transverse momenta, as observed in experimental data at RHIC. A similar dependence of the antikaon to pion ratio on transverse momentum is obtained, but it reaches a smaller value at intermediate transverse momenta. At high transverse momenta, the model predicts that both the antiproton to pion and the antikaon to pion ratio decrease and approach those given by the perturbative QCD. Both collective flow effect and coalescence of minijet partons with partons in the quark-gluon plasma affect significantly the spectra of hadrons with intermediate transverse momenta. Elliptic flows of phi mesons and baryons such as protons, lambdas, cascades, and omegas have also been evaluated from partons with elliptic flows extracted from fitting measured pion and kaon elliptic flows. The predicted proton and lambda elliptic flows are consistent with available experimental data.