De-Confinement in small systems: Clustering of color sources in high multiplicity p̄p collisions at √s = 1.8 TeV
Department of Physics and Astronomy, Purdue University, West Lafayette, IN-47907, USA
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Published online: 4 July 2016
It is shown that de-confinement can be achieved in high multiplicity non jet p̄p collisions at √s = 1.8 TeV Fermi National Accelerator Laboratory(FNAL- E735) experiment. In this paper we have analyzed the transverse momentum spectrum in the framework of the clustering of color sources. This frame-work naturally predicts the reduction in the charged particle multiplicity with respect to the value expected from the number of independent strings. Results are presented for both thermodynamic and transport properties. The initial temperature and energy density are obtained from the data via the color reduction factor F(ξ) and the associated string density parameter ξ. The results for he trace anomaly Δ and shear viscosity to entropy density ratio(η/s) are presented. These results confirm our earlier observation that the de-confined state of matter was created in high multiplicity events in p̄p collisions at √s = 1.8 TeV.
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