Quark gluon plasma search from hadron-hadron and heavy ion interactions

Recent experimental results to search for the quark-gluon plasma (QGP) from hadron-hadron collider experiments and heavy ion experiments from FNAL, BNL and CERN are overviewed. Based on the data from hadron-hadron interactions and heavy ion interactions, the characteristics of pt spectra, and the production properties of pions, kaons protons, antiprotons and hyperons are studied as a function of multiplicity. The multiplicity can be related to the energy density or entropy of the centrally produced matter, since higher energy density implies the larger number of produced particles. (R.P.) 21 refs.; 20 figs