Le Fèvre, A. and Leifels, Y. and Aichelin, J. and Hartnack, Ch. (2018) On the origin of the elliptic flow and its dependence on the Equation of State in heavy-ion reactions at intermediate energies. Il nuovo cimento C, 41 (5). pp. 1-11. ISSN 1826-9885
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Abstract
Recently it has been discovered that the elliptic flow, v2, of composite charged particles emitted at midrapidity in heavy-ion collisions at intermediate energies shows the strongest sensitivity to the Nuclear Equation of State (EoS) which has been observed up to now within a microscopic model. This dependence on the nuclear EoS is predicted by Quantum Molecular Dynamics (QMD) calculations (Le F`evre A. et al., Nucl. Phys. A, 945 (2016) 112.) which show as well that the absorption or rescattering of in-plane emitted particles by the spectator matter is not the main reason for the EoS dependence of the elliptic flow at mid-rapidity but different density gradients (and therefore different forces) in the direction of the impact parameter (x-direction) as compared to the direction perpendicular to the reaction plan (y-direction), caused by the presence of the spectator matter. The stronger density gradient in the y-direction accelerates the particles more and creates therefore a negative v2. When using a soft momentum-dependent EoS, the QMD calculations reproduce the experimental results.
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 27 Nov 2020 09:25 |
| Last Modified: | 27 Nov 2020 09:25 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/20313 |
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