The Shape of the Correlation Function

The correlation function measured in ultrarelativistic nuclear collisions is strongly non-Gaussian. Using two different models we study which effects can influence its shape and how much. In particular, we focus on the parametrizations expressed with the help of Lévy-stable distributions. We show th...

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Bibliographic Details
Published in:arXiv.org 2021-01
Main Authors: Cimerman, Jakub, Plumberg, Chrisopher, Tomášik, Boris
Format: Article
Language:English
Subjects:
Correlation analysis
Shape effects
Online Access:Get full text
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Summary:The correlation function measured in ultrarelativistic nuclear collisions is strongly non-Gaussian. Using two different models we study which effects can influence its shape and how much. In particular, we focus on the parametrizations expressed with the help of Lévy-stable distributions. We show that the Lévy index may deviate substantially from 2 due to non-critical effects such as resonance decays, event-by-event fluctuations and functional dependence on \(Q_{LI}\) or similar. We also study the corrections including the first-order Lévy expansion.
ISSN:2331-8422