Pion and kaon production in central Pb+Pb collisions at 20A and 30A GeV: Evidence for the onset of deconfinement

Pion and kaon production in central Pb+Pb collisions at 20A and 30A GeV: Evidence for the onset of deconfinement

Results on charged pion and kaon production in central Pb+Pb collisions at 20A and 30A GeV are presented and compared to data at lower and higher energies. Around 30A GeV a rapid change of the energy dependence for the yields of pions and kaons as well as for the shape of the transverse mass spectra...

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Veröffentlicht in:Physical review. C, Nuclear physics Nuclear physics, 2008-02, Vol.77 (2)
Hauptverfasser: Alt, C., Blume, C., Dinkelaker, P., Flierl, D., Kliemant, M., Kniege, S., Kollegger, T., Lungwitz, B., Mitrovski, M., Renfordt, R., Schuster, T., Stock, R., Strabel, C., Stroebele, H., Wetzler, A., Anticic, T., Kadija, K., Nicolic, V., Susa, T., Baatar, B.
Format: Artikel
Sprache:eng
Schlagworte:
CERN SPS SYNCHROTRON
ENERGY DEPENDENCE
GEV RANGE
KAONS
LEAD 208 REACTIONS
LEAD 208 TARGET
MASS SPECTRA
NUCLEAR PHYSICS AND RADIATION PHYSICS
NUCLEAR REACTION YIELD
PARTICLE PRODUCTION
PIONS
PROTONS
QUARK MATTER
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Beschreibung
Zusammenfassung:Results on charged pion and kaon production in central Pb+Pb collisions at 20A and 30A GeV are presented and compared to data at lower and higher energies. Around 30A GeV a rapid change of the energy dependence for the yields of pions and kaons as well as for the shape of the transverse mass spectra is observed. The change is compatible with the prediction that the threshold for production of a state of deconfined matter at the early stage of the collisions is located at low CERN Super Proton Synchroton energies.
ISSN:0556-2813
1089-490X
DOI:10.1103/PHYSREVC.77.024903