Finding signatures of the nuclear symmetry energy in heavy-ion collisions with deep learning
Finding signatures of the nuclear symmetry energy in heavy-ion collisions with deep learning
复制标题
通过深度学习寻找重离子碰撞中核对称能量的特征
DOI:
10.1016/j.physletb.2021.136669
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发表时间:
2021-07
影响因子:
4.4
通讯作者:
Zhou Kai
中科院分区:
文献类型:
--
作者:
Wang Yongjia;Li Fupeng;Li Qingfeng;Lu Hongliang;Zhou Kai
A deep convolutional neural network (CNN) is developed to study symmetry energy (E sym (ρ)) effects by learning the mapping between the symmetry energy and the two-dimensional (transverse momentum and rapidity) distributions of protons and neutrons in heavy-ion collisions. Supervised training is performed with labeled data-set from the ultrarelativistic quantum molecular dynamics (UrQMD) model simulation. It is found that, by using proton spectra on event-by-event basis as input, the accuracy for classifying the soft and stiff E sym (ρ) is about 60% due to large event-by-event fluctuations, while by setting event-summed proton spectra as input, the classification accuracy increases to 98%. The accuracies for 5-label (5 different E sym (ρ)) classification task are about 58% and 72% by using proton and neutron spectra, respectively. For the regression task, the mean absolute errors (MAE) which measure the average magnitude of the absolute differences between the predicted and actual L (the slope parameter of E sym (ρ)) are about 20.4 and 14.8 MeV by using proton and neutron spectra, respectively. Fingerprints of the density-dependent nuclear symmetry energy on the transverse momentum and rapidity distributions of protons and neutrons can be identified by convolutional neural network algorithm.
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影响因子:
4.4
作者:
Xu Jun;Zhou Jia;Zhang Zhen;Xie Wen-Jie;Li Bao-An
通讯作者:
Li Bao-An
DOI:
10.1016/0370-1573(91)90094-3
发表时间:
1991-04
期刊:
Physics Reports
影响因子:
--
作者:
J. Aichelin
通讯作者:
J. Aichelin
DOI:
10.1016/j.physletb.2021.136084
发表时间:
2021-01
期刊:
--
影响因子:
--
作者:
Y. Song;R. Wang;Y. Ma;X. Deng;H. Liu
通讯作者:
Y. Song;R. Wang;Y. Ma;X. Deng;H. Liu
DOI:
10.1016/j.ppnp.2020.103775
发表时间:
2020-03
期刊:
arXiv: Nuclear Theory
影响因子:
--
作者:
M. Colonna
通讯作者:
M. Colonna
影响因子:
2.8
作者:
Hao Yu;D. Fang;Yugang Ma
通讯作者:
Hao Yu;D. Fang;Yugang Ma