Different coalescence sources of light nucleus production in Au-Au collisions at √sNN=3 GeV  

作　　者：王瑞芹 吕济鹏 李彦豪 宋军 邵凤兰 Rui-Qin Wang;Ji-Peng Lv;Yan-Hao Li;Jun Song;Feng-Lan Shao(School of Physics and Physical Engineering,Qufu Normal University,Qufu 273165,China;School of Physical Science and Intelligent Engineering,Jining University,Jining 273155,China)

机构地区：[1]School of Physics and Physical Engineering,Qufu Normal University,Qufu 273165,China [2]School of Physical Science and Intelligent Engineering,Jining University,Jining 273155,China

出　　处：《Chinese Physics C》2024年第5期160-179,共20页中国物理C（英文版）

基　　金：Supported in part by the National Natural Science Foundation of China(12175115,12375074);the Natural Science Foundation of Shandong Province,China(ZR2020MA097);the Higher Educational Youth Innovation Science and Technology Program of Shandong Province,China(2020KJJ004,2019KJJ010)。

摘　　要：We study the production of light nuclei in the coalescence mechanism of Au-Au collisions at midrapidity at √sNN=3GeV.We derive analytic formulas of the momentum distributions of two bodies,three bodies,and four nucleons coalescing into light nuclei and naturally explain the transverse momentum spectra of the deuteron(d),triton(t),helium-3(3He),and helium-4(4He).We reproduce data on the yield rapidity densities,yield ratios,and averaged transverse momenta of d,t,3He,and 4He and provide the proportions of contributions from different coalescence sources for t,3He,and 4He in their production.We find that besides nucleon coalescence,nucleon+nucleus coalescence and nucleus+nucleus coalescence may play requisite roles in light nucleus production in Au-Au collisions at √sNN=3 GeV.

关 键 词：light nucleus production the coalescence model relativistic heavy ion collision 

分 类 号：O57[理学—粒子物理与原子核物理]