https://doi.org/10.1140/epjc/s10052-022-10480-0
Regular Article - Theoretical Physics
Harmonic flow correlations in Au+Au reactions at 1.23 AGeV: a new testing ground for the equation-of-state and expansion geometry
1
Institut für Theoretische Physik, Goethe Universität Frankfurt, Max-von-Laue-Strasse 1, 60438, Frankfurt am Main, Germany
2
GSI Helmholtzzentrum fürSchwerionenforschung GmbH, Planckstr. 1, 64291, Darmstadt, Germany
3
Helmholtz Research Academy Hesse for FAIR (HFHF), GSI Helmholtz Center for Heavy Ion Physics, Campus Frankfurt, Max-von-Laue-Str. 12, 60438, Frankfurt, Germany
4
Suranaree University of Technology, University Avenue 111, 30000, Nakhon Ratchasima, Thailand
5
Frankfurt Institute for Advanced Studies (FIAS), Ruth-Moufang-Str.1, 60438, Frankfurt am Main, Germany
a
treichert@itp.uni-frankfurt.de
Received:
30
March
2022
Accepted:
31
May
2022
Published online:
6
June
2022
Correlations between the harmonic flow coefficients 
, 
, 
and 
of nucleons in semi-peripheral Au+Au collisions at a beam energy of 1.23 AGeV are investigated within the hadronic transport approach ultra-relativistic quantum molecular dynamics (UrQMD). In contrast to ultra-relativistic collision energies (where the flow coefficients are evaluated with respect to the respective event plane), we predict strong correlations between the flow harmonics with respect to the reaction plane. Based on an event-by-event selection of the midrapidity final state elliptic flow of nucleons we show that as a function of rapidity, (I) the sign of the triangular flow changes, (II) that the shape of changes from convex to concave, and (III) that 
and 
for all different event classes, indicating strong correlations between all investigated harmonic flow coefficients.
© The Author(s) 2022
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Funded by SCOAP3
