Femtoscopy with Lévy sources from SPS through RHIC to LHC

Abstract

Femtoscopy is a unique tool to investigate the space-time geometry of the matter created in ultra-relativistic collisions. If the probability density distribution of hadron emission is parametrized, then the dependence of its parameters on particle momentum, collision energy, and collision geometry can be given. In recent years, several measurements came to light that indicated the adequacy of assuming a Lévy-stable shape for the mentioned distribution. In parallel, several new phenomenological developments appeared, aiding the interpretation of the experimental results or providing tools for the measurements. In this paper, we discuss important aspects of femtoscopy with Lévy sources in light of some of these advances, including phenomenological and experimental ones.

Comments: 14 pages, 5 figures, contribution to the 52nd International Symposium on Multiparticle Dynamics (ISMD 2023). One additional plot (right plot of Fig. 2) and discussion added in December, 2024