2011/05/03 by Le-xue Sun, Le-Xue Sun, Rui-qin Wang +4
Physics and Astronomy · #Hadron #Heavy ion #High-Energy Particle Collisions Research #Large Hadron Collider #Particle physics theoretical and experimental studies #Pulsars and Gravitational Waves Research #Quark #Rapidity #Spectral line #Strangeness #Super Proton Synchrotron #hep-ph
paper · pdf · doi:10.1088/1674-1137/36/1/009
7 pages, 5 figures
arxiv created 2011/05/03 · openalex publication_date 2012/01/01 · arxiv updated 2015/05/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The quark combination mechanism of hadron production is applied to nucleus-nucleus collisions at the CERN Super Proton Synchrotron (SPS) and the BNL Alternating Gradient Synchrotron (AGS). The rapidity spectra of identified hadrons and their spectrum widths are studied. The data of π − , K ± , φ, Λ, , Ξ − and at 80 and 40 A GeV, and in particular at 30 and 20 A GeV where the onset of deconfinement is suggested to happen, are consistently described by the quark combination model. However, at AGS 11.6 A GeV below the onset, the π ± , K ± and Λ spectra cannot be simultaneously explained, indicating the disappearance of the intrinsic correlation of their production in the constituent quark level. The collision-energy dependence of the rapidity spectrum widths of the constituent quarks, and the strangeness of the hot and dense quark matter produced in heavy ion collisions, are obtained and discussed.