Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-03-05
Phys.Lett. B567 (2003) 175-178
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages, 2 figures
Scientific paper
10.1016/j.physletb.2003.06.043
We found that the experimental results on transverse mass spectra of kaons produced in central Pb+Pb (Au+Au) interactions show an anomalous dependence on the collision energy. The inverse slopes of the spectra increase with energy in the low (AGS) and high (RHIC) energy domains, whereas they are constant in the intermediate (SPS) energy range. We argue that this anomaly is probably caused by a modification of the equation of state in the transition region between confined and deconfined matter. This observation may be considered as a new signal, in addition to the previously reported anomalies in the pion and strangeness production, of the onset of deconfinement located in the low SPS energy domain.
Bugaev Kyrill
Gazdzicki Marek
Gorenstein Mark I.
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