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HK: Fachverband Physik der Hadronen und Kerne

HK 13: Physik mit schweren Ionen

HK 13.6: Vortrag

Dienstag, 13. März 2007, 15:30–15:45, F

Recent results from NA49 — •Michael Kosta Mitrovski¹, Christopher Alt¹, Alexandra Argyrakis¹, Christoph Blume¹, Peter Dinkelaker¹, Volker Friese², Marek Gazdzicki¹, Claudia Höhne², Michael Kliemant¹, Stefan Kniege¹, Dmytro Kresan², Benjamin Lungwitz¹, Rainer Renfordt¹, Tim Schuster¹, Reinhard Stock¹, Claudia Strabel¹, Herber Ströbele¹, Millica Utvic¹, and Alexander Wetzler¹ for the NA49 collaboration — ¹Fachbereich Physik der Universität Frankfurt — ²Gesellschaft für Schwerionenforschung (GSI), Darmstadt

Due to its large acceptance, the NA49 experiment has aquired a large amount of data for a variety of collision systems and energies, from p+p up to Pb+Pb. We will present new results from NA49 on the system size dependence of Λ and Ξ production in A+A collisions at 40A and 158A GeV, as well as the energy dependence of hyperon, (anti-)proton and K_s⁰ production. Together with the results for other identified particles (charged pions and kaons and φ mesons) and data from AGS and RHIC, this allows for a comprehensive study of the energy and system size dependence of various hadronic observables, with the aim to identify phenomena related to the onset of deconfinement. We will discuss in detail the variation of transverse as well as longitudinal spectra to adress the evolution of the fireball and the stopping of the incoming nuclei; including strangeness enhancement. The results will be discussed for possible indications for an onset of deconfinement and compared to different model predictions.