2019/08/09 by STAR Collaboration, J. Adam, L. Adamczyk +360
Physics and Astronomy · #Charged particle #Elliptic flow #Energy (signal processing) #Heavy ion #High-Energy Particle Collisions Research #Ion #Large Hadron Collider #Nuclear physics #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Pseudorapidity #Quantum Chromodynamics and Particle Interactions #Rapidity #Spectral line #hep-ex #hep-ph #nucl-ex
paper · pdf · doi:10.1103/physrevc.101.024905
published as Phys. Rev. C 101, 024905 (2020) · 30 pages, 29 figures and 8 tables
arxiv created 2019/08/09 · openalex created_date 2019/09/19 · openalex publication_date 2020/02/07 · arxiv updated 2020/02/12 · openalex updated_date 2026/08/05
We report systematic measurements of bulk properties of the system created in Au+Au collisions at √sNN=14.5 GeV recorded by the STAR detector at the Relativistic Heavy Ion Collider (RHIC). The transverse momentum spectra of \ensuremathπ^\ifmmode±\else\textpm\fi, K^\ifmmode±\else\textpm\fi, and p(p) are studied at midrapidity (|y|<0.1) for nine centrality intervals. The centrality, transverse momentum (pT), and pseudorapidity (\ensuremathη) dependence of inclusive charged particle elliptic flow (v2), and rapidity-odd charged particles directed flow (v1) results near midrapidity are also presented. These measurements are compared with the published results from Au+Au collisions at other energies, and from Pb+Pb collisions at √sNN=2.76 TeV. The results at √sNN=14.5 GeV show similar behavior as established at other energies and fit well in the energy dependence trend. These results are important as the 14.5-GeV energy fills the gap in \ensuremathμB, which is of the order of 100 MeV, between √sNN=11.5 and 19.6 GeV. Comparisons of the data with UrQMD and AMPT models show poor agreement in general.