Possible origin of HADES data on proton number fluctuations in Au+Au collisions

  • Recent data of the HADES Collaboration in Au+Au central collisions at sNN=2.4 GeV indicate large proton number fluctuations inside one unit of rapidity around midrapidity. This can be a signature of critical phenomena due to the strong attractive interactions between baryons. We study an alternative hypothesis that these large fluctuations are caused by the event-by-event fluctuations of the number of bare protons, and no interactions between these protons are assumed. The proton number fluctuations in five symmetric rapidity intervals Δy inside the region ΔY=1 are calculated using the binomial acceptance procedure. This procedure assumes the independent (uncorrelated) emission of protons, and it appears to be in agreement with the HADES data. To check this simple picture we suggest to calculate the correlation between proton multiplicities in non-overlapping rapidity intervals Δy1 and Δy2 placed inside ΔY=1.

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Metadaten
Author:Oleh SavchukORCiD, Roman V. PoberezhnyukORCiD, Mark I. GorensteinORCiDGND
URN:urn:nbn:de:hebis:30:3-783504
DOI:https://doi.org/10.1016/j.physletb.2022.137540
ISSN:0370-2693
Parent Title (English):Physics Letters B
Publisher:Elsevier
Place of publication:Amsterdam
Document Type:Article
Language:English
Date of Publication (online):2022/11/07
Date of first Publication:2022/11/03
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2023/10/09
Volume:835
Issue:137540
Page Number:4
HeBIS-PPN:513581081
Institutes:Physik
Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS)
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International

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