PoS - Proceedings of Science
Volume 390 - 40th International Conference on High Energy physics (ICHEP2020) - Parallel: Heavy Ions
The Shape of the Correlation Function
J. Cimerman,* B. Tomasik, C. Plumberg
*corresponding author
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Pre-published on: January 07, 2021
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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.
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