Light-nuclei production and search for the QCD critical point

  • We discuss the potential of light-nuclei measurements in heavy-ion collisions at intermediate energies for the search of the hypothetical QCD critical end-point. A previous proposal based on neutron density fluctuations has brought appealing experimental evidences of a maximum in the ratio of the number of tritons times protons, divided over deuterons square, O tpd. However these results are difficult to reconcile with the state-of-the-art statistical thermal model predictions. Based on the idea that the QCD critical point can lead to a substantial attraction among nucleons, we propose new light-nuclei multiplicity ratios involving He in which the maximum would be more noticeable. We argue that the experimental extraction is feasible by presenting these ratios formed from actual measurements of total and differential yields at low and high collision energies from FOPI and ALICE experiments, respectively. We also illustrate the possible behavior of these ratios at intermediate energies applying a semiclassical method based on flucton paths using the preliminary NA49 and STAR data for O tpd as input.

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Author:Ėdvard V. ŠurjakGND, Juan M. Torres-RinconORCiDGND
Parent Title (English):The European physical journal. A
Place of publication:Berlin ; Heidelberg
Document Type:Article
Date of Publication (online):2020/09/29
Date of first Publication:2020/09/29
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2023/11/23
Issue:9, art. 241
Article Number:241
Page Number:7
First Page:1
Last Page:7
Work supported by the Office of Science, U.S. Department of Energy under Contract no. DE-FG-88ER40388 and by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through Projects no. 411563442 (Hot Heavy Mesons) and no. 315477589-TRR 211 (Strong-interaction matter under extreme conditions). Open Access funding enabled and organized by Projekt DEAL.
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International