Strangeness Enhancement: Challenges and Successes

Abstract

Highly effective conversion of kinetic energy into abundant particle multiplicity is the remarkable feature discovered in high energy heavy ion collisions. This short and pedagogic review addresses topical issues related to the understanding of this phenomenon, originating in the creation of the deconfined quark--gluon plasma phase. I consider in depth the apparently simple, yet sometimes misunderstood, intricate issues: a) statistical hadro-chemistry, chemical parameters, b) strange flavor chemical equilibration in quark--gluon plasma, and c) particle yields and sudden hadronization, in the historic perspective of work and competition with my friend Jozsef Zimanyi.