2009/11/16 by STAR Collaboration, M. M. Aggarwal, B. I. Abelev +98 · 1 citation
Physics and Astronomy · #Baryon #Hadron #High-Energy Particle Collisions Research #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Spectral line #nucl-ex
paper · pdf · doi:10.1103/physrevc.81.054907
published as Phys.Rev.C81:054907,2010 · Submitted to Phys. Rev. C, 9 pages, 5 figures
arxiv created 2009/11/16 · openalex publication_date 2010/05/27 · arxiv updated 2012/08/03 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report new results on identified (anti)proton and charged pion spectra at large transverse momenta (3<pT<10 GeV/c) from Cu+Cu collisions at √sNN=200 GeV using the STAR detector at the Relativistic Heavy Ion Collider (RHIC). This study explores the system size dependence of two novel features observed at RHIC with heavy ions: the hadron suppression at high-pT and the anomalous baryon to meson enhancement at intermediate transverse momenta. Both phenomena could be attributed to the creation of a new form of QCD matter. The results presented here bridge the system size gap between the available pp and Au+Au data, and allow for a detailed exploration of the onset of the novel features. Comparative analysis of all available 200 GeV data indicates that the system size is a major factor determining both the magnitude of the hadron spectra suppression at large transverse momenta and the relative baryon to meson enhancement.