Proton correlations and apparent intermittency in the UrQMD model with hadronic potentials

  • It is shown that the inclusion of hadronic interactions, and in particular nuclear potentials, in simulations of heavy ion collisions at the SPS energy range can lead to obvious correlations of protons. These correlations contribute significantly to an intermittency analysis as performed at the NA61 experiment. The beam energy and system size dependence is studied by comparing the resulting intermittency index for heavy ion collisions of different nuclei at beam energies of 40A, 80A and 150A GeV. The resulting intermittency index from our simulations is similar to the reported values of the NA61 collaboration, if nuclear interactions are included. The observed apparent intermittency signal is the result of the correlated proton pairs with small relative transverse momentum Δpt, which would be enhanced by hadronic potentials, and this correlation between the protons is slightly influenced by the coalescence parameters and the relative invariant four-momentum qinv cut.

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Author:Pengcheng LiORCiD, Yongjia Wang, Jan SteinheimerORCiDGND, Qingfeng LiORCiD, Hongfei ZhangORCiD
Parent Title (English):Physics letters B
Place of publication:Amsterdam
Document Type:Article
Date of Publication (online):2021/05/26
Date of first Publication:2021/05/26
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2022/09/25
Tag:Hadronic potential; Heavy-ion collisions; Intermittency; Transport model
Page Number:5
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoCreative Commons - Namensnennung 4.0