Pion production and absorption in heavy-ion collisions release_4ivymnzdyvfd3cl64f2trgw6fm

by Yuan Gao, Lei Zhang, Gao-Chan Yong, Zi-Yu Liu, Wei Zuo

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2020  

Abstract

Based on the isospin dependent transport model IBUU, the pion production and its absorption are thoroughly studied in the central collision of Au+Au at a beam energy of 400 MeV/nucleon. It is found that the pions are firstly produced by the hard Δ decay at the average density around 1.75ρ_0, whereas about 18% of them are absorbed absolutely in the subsequent inelastic collisions. For the free pions observed, more than half of them have been scattered for one or more times before they are free from matter. And the more scattering numbers of pions, the higher the momentum they possess. These pions, due to longer time of their existence in high density nuclear matter, carry more information about the symmetry energy of the nuclear matter at high densities.
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Date   2020-09-06
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arXiv  2009.02674v1
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