Comparison of pair-source and correlation-function based Lévy analyses in Ar+Sc system at SPS energies
Abstract
Non-Gaussian features in femtoscopic observables have been observed in high-energy collisions, yet their origin remains not fully understood. This study focuses on the phenomenological approach to femtoscopy, going beyond the Gaussian approximation by utilizing Lévy-stable source distributions. Using UrQMD simulations, three-dimensional analyses of pion sources are done in central Ar+Sc collisions, and the extracted parameters are studied as functions of transverse mass and collision energy. This analysis contributes to a hadronic baseline motivated by past and future research work in femtoscopy at the NA61/SHINE experiment. A direct methodological comparison is presented between parameters extracted from the projections of three-dimensional pair-source distribution and those obtained from the three-dimensional correlation function, reconstructed via Fast Fourier Transform.
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BibTeX
@misc{porfy2026comparison,
title = {{Comparison of pair-source and correlation-function based Lévy analyses in Ar+Sc system at SPS energies}},
author = {Barnabás Pórfy},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.08141},
eprint = {2610.08141},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.08141},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Comparison of pair-source and correlation-function based Lévy analyses in Ar+Sc system at SPS energies
AU - Barnabás Pórfy
PY - 2026
DA - 2026/10/06
PB - arXiv
DO - 10.48550/arxiv.2610.08141
UR - https://arxiv.org/abs/2610.08141
AB - Non-Gaussian features in femtoscopic observables have been observed in high-energy collisions, yet their origin remains not fully understood. This study focuses on the phenomenological approach to femtoscopy, going beyond the Gaussian approximation by utilizing Lévy-stable source distributions. Using UrQMD simulations, three-dimensional analyses of pion sources are done in central Ar+Sc collisions, and the extracted parameters are studied as functions of transverse mass and collision energy. This analysis contributes to a hadronic baseline motivated by past and future research work in femtoscopy at the NA61/SHINE experiment. A direct methodological comparison is presented between parameters extracted from the projections of three-dimensional pair-source distribution and those obtained from the three-dimensional correlation function, reconstructed via Fast Fourier Transform.
ER -