Net-baryon-, net-proton-, and net-charge kurtosis in heavy-ion collisions within a relativistic transport approach - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles European Physical Journal C: Particles and Fields Year : 2012

Net-baryon-, net-proton-, and net-charge kurtosis in heavy-ion collisions within a relativistic transport approach

Marlene Nahrgang
T. Schuster
  • Function : Author
M. Mitrovski
  • Function : Author
R. Stock
  • Function : Author
M. Bleicher
  • Function : Author

Abstract

We explore the potential of net-baryon, net-proton and net-charge kurtosis measurements to investigate the properties of hot and dense matter created in relativistic heavy-ion collisions. Contrary to calculations in a grand-canonical ensemble we explicitly take into account exact electric and baryon charge conservation on an event-by-event basis. This drastically limits the width of baryon fluctuations. A simple model to account for this is to assume a grand-canonical distribution with a sharp cut-off at the tails. We present baseline predictions of the energy dependence of the net-baryon, net-proton and net-charge kurtosis for central (b≤2.75 fm) Pb+Pb/Au+Au collisions from E lab=2A GeV to sNN−−−√=200 GeV from the UrQMD model. While the net-charge kurtosis is compatible with values around zero, the net-baryon number decreases to large negative values with decreasing beam energy. The net-proton kurtosis becomes only slightly negative for low sNN−−−√ .

Dates and versions

in2p3-00903420 , version 1 (12-11-2013)

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Cite

Marlene Nahrgang, T. Schuster, M. Mitrovski, R. Stock, M. Bleicher. Net-baryon-, net-proton-, and net-charge kurtosis in heavy-ion collisions within a relativistic transport approach. European Physical Journal C: Particles and Fields, 2012, 72, pp.2143. ⟨10.1140/epjc/s10052-012-2143-6⟩. ⟨in2p3-00903420⟩
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