The enhancement of v4 in nuclear collisions at the highest densities signals a first-order phase transition

  • The beam energy dependence of v4 (the quadrupole moment of the transverse radial flow) is sensitive to the nuclear equation of state (EoS) in mid-central Au + Au collisions at the energy range of 3<sNN−−−−√<30 GeV, which is investigated within the hadronic transport model JAM. Different equations of state, namely, a free hadron gas, a first-order phase transition and a crossover are compared. An enhancement of v4 at sNN−−−−√≈6 GeV is predicted for an EoS with a first-order phase transition. This enhanced v4 flow is driven by both the enhancement of v2 as well as the positive contribution to v4 from the squeeze-out of spectator particles which turn into participants due to the admixture of the strong collective flow in the shocked, compressed nuclear matter.

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Metadaten
Author:Yasushi Nara, Jan Steinheimer-Froschauer, Horst StöckerORCiDGND
URN:urn:nbn:de:hebis:30:3-499581
DOI:https://doi.org/10.1140/epja/i2018-12626-y
Parent Title (English):The European physical journal / A / Hadrons and nuclei
Document Type:Article
Language:English
Year of Completion:2018
Date of first Publication:2018/11/06
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2019/04/09
Volume:54
Issue:188
Page Number:5
Note:
This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
HeBIS-PPN:451035585
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - Namensnennung 4.0