Energy scan by $\varphi$ mesons and threshold energy for the confinement-deconfinement phase transition

Abstract

We argue that the ratio of $\varphi$ mesons multiplicity over cube of the mean $p_T$ is proportional to the degeneracy of the medium produced in ultra-relativistic heavy ion collisions. The ratio extracted from the existing $\varphi$ meson data in the energy range $\sqrt{s}$=6.3-200 GeV, indicate that beyond a threshold energy ${\sqrt{s}}_{th}=15.74\pm 8.10$ GeV, the medium crosses over from a confined phase to a deconfined phase.

Revised version to be published in Phys. Lett. B. 5 pages, 6 figures.

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• The QCD Equation of State with almost Physical Quark Masses
• Partonic flow and $\varphi$-meson production in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV
• Energy dependence of phi meson production in central Pb+Pb collisions at sqrt(s_nn) = 6 to 17 GeV
• Nearly perfect fluid in Au+Au collisions at RHIC
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• Elliptic Flow and Dissipation in Heavy-Ion Collisions at E_{lab} = (1--160)A GeV

Cited by in corpus (1)

• Stopping in central Pb + Pb collisions at SPS energies and beyond