Abstract
A potential version of the UrQMD (UrQMD/M) transport model and a traditional coalescence model are combined to calculate the production of 3He fragments in central Pb+Pb collisions at SPS energies 20-80 GeV/nucleon. It is found that the Lorentz transformation in the afterburner influences visibly the 3He yield and should be considered in calculations. The rapidity distribution of 3He multiplicities (including the concave shape) can be described well with UrQMD/M when it stops during t cut=(100±25) fm/c and the coalescence afterburner with one parameter set of (R 0,P 0)=(3.8 fm, 0.3 GeV/c) is taken into use afterwards.
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Li, Q., Wang, Y., Wang, X. et al. Helium-3 production from Pb+Pb collisions at SPS energies with the UrQMD model and the traditional coalescence afterburner. Sci. China Phys. Mech. Astron. 59, 632002 (2016). https://doi.org/10.1007/s11433-015-5775-3
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DOI: https://doi.org/10.1007/s11433-015-5775-3