Indication of a Co-Existing Phase of Quarks and Hadrons in Nucleus - Nucleus Collisions
Bedangadas Mohanty, Jan-e Alam, Sourav Sarkar, Tapan K. Nayak, Basanta K. Nandi
Abstract
The variation of average transverse mass of identified hadrons with charge multiplicity have been studied for AGS, SPS and RHIC energies. The observation of a plateau in the average transverse mass for multiplicities corresponding to SPS energies is attributed to the formation of a co-existence phase of quark gluon plasma and hadrons. A subsequent rise for RHIC energies may indicate a deconfined phase in the initial state. Several possibilities which can affect the average transverse mass are discussed. Constraints on the initial temperature and thermalization time have been put from the various experimental data available at SPS energies.
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