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Evidence for hadronic deconfinement in p-p collisions at 1.8 TeV

T. Alexopoulos, E. W. Anderson, A. T. Bujak, D. D. Carmony, A. R. Erwin, L. J. Gutay, A. S. Hirsch, K. S. ~Nelson, N. T. Porile, S. H. Oh, R. P. Scharenberg, B. K. Srivastava, B. C. Stringfellow, F. Turkot, J. Warchol, W. D. Walker

hep-exarXiv:hep-ex/0201030

Abstract

We have measured deconfined hadronic volumes, 4.4 < V < 13.0 fm3, produced by a one dimensional (1D) expansion. These volumes are directly proportional to the charged particle pseudorapidity densities 6.75 < dNc/dη< 20.2. The hadronization temperature is T = 179.5 5 (syst) MeV. Using Bjorken's 1D model,the hadronization energy density is εF = 1.10 0.26 (stat) GeV/fm3 corresponding to an excitation of 24.8 6.2 (stat) quark-gluon degrees of freedom.

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