Seminarium Fizyki Jądra Atomowego

Exploring the space-time extent of particle production is an important goal of heavy-ion physics, and substantial effort has been made in order to understand the underlying physics behind the experimental observations of non-Gaussian behavior. In experiments, femtoscopic (momentum) correlations are utilized to gain information about the space-time geometry of the particle emitting source. In order to quantify the evolution of the source with pair momentum and collision characteristics, one may parametrize it assuming that the source emitting the particles has a Lévy-stable distribution, characterized by the Lévy exponent α and the Lévy scale R. In this talk we investigate physical reasons for the appearance of Lévy-stable sources, as well as the role of Lévy parameters in exploring the QCD phase diagram.