Study of The Thermal Deconfining Phase Transition at Zero Baryochemical Potential for Different Hadronic Phase Configurations

In this study, we investigate how the composition of the hadronic phase affects the thermally driven Deconfining Phase Transition in Quantum Chromodynamics (QCD) at zero baryochemical potential, from a confined Hadronic Gas (HG) phase to a deconfined Quark Gluon Plasma (QGP) phase. To describe this QCD transition in a finite volume, we work in a phenomenological statistical framework using a model which considers the coexistence of hadronic and QGP phases in a finite volume, together with the MIT bag model. Several configurations of the hadronic phase are examined, including a Hadronic Gas composed exclusively of pions, exclusively of kaons, or of a mixture of both mesons, as well as a configuration in which the Hadronic Gas is formed by nucleons, namely protons and neutrons. The study mainly focuses on the thermal behavior of several physical observables, referred to as response functions, in the vicinity of the transition region as the temperature varies. Through this analysis, we identify characteristic signatures associated with the phase transition and carry out a comparative investigation of the results obtained for the different hadronic phase compositions and their corresponding thermodynamic properties. These comparisons provide further insight into the role of hadronic constituents in determining transition behavior.