Information theory approach (extensive and nonextensive) to high-energy multiparticle production processes

We present an overview of information theory approach (both in its extensive and nonextensive versions) applied to high-energy multiparticle production processes. It will be illustrated by analysis of single-particle distributions measured in proton–proton, proton–antiproton and nuclear collisions. We shall demonstrate the particular role played by the nonextensivity parameter q in such analysis as summarizing our knowledge on the fluctuations existed in hadronizing system.