PoS - Proceedings of Science
Volume 314 - The European Physical Society Conference on High Energy Physics (EPS-HEP2017) - Heavy Ion Physics (Parallel Session). Conveners: Ralf Averbeck; Raphael Granier de Cassagnac; Carlos Salgado. Scientific Secretary: Andrea Dainese.
Bulk observables and dileptons at SIS energies with a new transport approach SMASH
D. Oliinychenko*, V. Steinberg, J. Staudenmaier, M. Mayer and H. Petersen
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Pre-published on: October 30, 2017
Published on: March 20, 2018
Abstract
Transport approaches are widely used to simulate heavy-ion collisions and allow to compute most experimental observables. In this contribution pion production, $v_1$ and $v_2$ of protons in Au+Au collisions at energies $E_{\mathrm{lab}} = 0.4 - 2 \, A$ GeV and dilepton production in pp collisions at $\sqrt{s} = 3.5$ GeV are computed using a new SMASH transport approach. These results are compared to the experimental data obtained by the FOPI and HADES collaborations. Overall, a good description of the data is achieved. Pion multiplicities and $N_{\pi^-}/N_{\pi^+}$ ratio at $E_{\mathrm{lab}} = 0.4 - 0.8 \, A$ GeV are very sensitive not only to nuclear potentials, but also to Fermi motion and Pauli blocking effects. A good description of proton $v_1$ and $v_2$ consistently requires a potential corresponding to a hard equation of state.
DOI: https://doi.org/10.22323/1.314.0178
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