Helium-3 production from Pb+Pb collisions at SPS energies with the UrQMD model and the traditional coalescence afterburner
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- 作者：QingFeng Li ; YongJia Wang ; XiaoBao Wang…
- 关键词：rapidity distribution of Helium ; 3 ; UrQMD model ; coalescence model ; Lorentz transformation
- 刊名：SCIENCE CHINA Physics, Mechanics & Astronomy
- 出版年：2016
- 出版时间：March 2016
- 年：2016
- 卷：59
- 期：3
- 全文大小：430 KB
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YongJia Wang (1)
XiaoBao Wang (1)
CaiWan Shen (1)
1. School of Science, Huzhou University, Huzhou, 313000, China - 刊物类别：Physics and Astronomy
- 刊物主题：Physics
Chinese Library of Science
Mechanics, Fluids and Thermodynamics
Physics - 出版者：Science China Press, co-published with Springer
- ISSN：1869-1927
文摘
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. Keywords rapidity distribution of Helium-3 UrQMD model coalescence model Lorentz transformation