Nonlinear Phenomena in Complex Systems, 2026, Vol.29, No.2, pp.205

NONLINEAR PHENOMENA IN COMPLEX SYSTEMS
An Interdisciplinary Journal

2026, Vol.29, No.2, pp.205 - 209

Correlation Femtoscopy of Pions and Kaons in Au+Au Collisions at 14.6 GeV Using EPOS4

E. Alpatov, A. Korobitsin, A. Kraeva, K. Mikhaylov, and A. Povarov

Correlation femtoscopy of identical charged pions provides direct access to the space-time structure of the particle-emitting source in relativistic heavy-ion collisions. In this work, we present a femtoscopic study of π^±π^± and K^±K^± correlations in Au+Au collisions at \(\sqrt{s_{NN}}\) = 14.6 GeV using the EPOS4 framework. Two configurations are investigated: (i) evolution from the initial state through the hydrodynamic phase up to particlization, and (ii) the full hybrid approach including the subsequent hadronic rescattering stage. The extracted femtoscopic radii are analyzed as a function of transverse momentum and compared between the two scenarios to quantify the impact of the hadronic phase on the space-time extent and dynamics of the emission source. The comparison provides insight into the role of final-state interactions in shaping femtoscopic observables at intermediate beam energies.

Key words: heavy ion collision,femtoscopy, particlization, EPOS4 framework

DOI: https://doi.org/10.5281/zenodo.21108121

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