Open AccessKaon and pion interferometry. Final report
Author(s) -
M. Murray
Publication year - 1998
Language(s) - English
Resource type - Reports
DOI - 10.2172/307888
Subject(s) - physics , nuclear physics , pion , baryon , center of mass (relativistic) , coalescence (physics) , particle physics , spectral line , national laboratory , energy–momentum relation , engineering physics , classical mechanics , astronomy , astrobiology
Both NA44 and EOS continue to publish high quality data on relativistic heavy ion collisions. The next leap in energy will be provided by BRAHMS at RHIC. Experiment NA44 has measured particle correlations of {pi}{sup {+-}}, K{sup +} and protons and single particle distributions of {pi}{sup {+-}}, K{sup {+-}}, p, {anti p}, d and {anti d} for pA, SA and PbPb collisions at 450GeV/c, 200A{center_dot}GeV and 158A{center_dot}GeV for the p, S and Pb beams respectively. When the spectra are fitted to an exponential in m{sub T}, the inverse slopes increase as the system gets heavier and with increasing particle mass. For larger systems the baryon density at mid-rapidity increases implying more secondary collisions. These fuel a collective expansion and a boost in transverse momentum proportional to the mass as seen in the data. The EOS collaboration has continued to publish results from their large data set of heavy ion collisions at the BEVALAC. They plan to study the energy dependence of coalescence and flow by comparing results from NA44 and EOS