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The impact parameter is one of the crucial physical quantities of heavy-ion collisions (HICs), and can affect obviously many observables at the final state, such as the multifragmentation and the collective flow. Usually, it cannot be…

Nuclear Theory · Physics 2020-10-28 Fupeng Li , Yongjia Wang , Hongliang Lü , Pengcheng Li , Qingfeng Li , Fanxin Liu

Machine Learning (ML) algorithms have been demonstrated to be capable of predicting impact parameter in heavy-ion collisions from transport model simulation events with perfect detector response. We extend the scope of ML application to…

In this study, Au+Au collisions with the impact parameter of $0 \leq b \leq 12.5$ fm at $\sqrt{s_{NN}} = 200$ GeV are simulated by the AMPT model to provide the preliminary final-state information. After transforming these information into…

High Energy Physics - Phenomenology · Physics 2022-07-13 Pei Xiang , Yuan-Sheng Zhao , Xu-Guang Huang

A new method of event characterization based on Deep Learning is presented. The PointNet models can be used for fast, online event-by-event impact parameter determination at the CBM experiment. For this study, UrQMD and the CBM detector…

High Energy Physics - Phenomenology · Physics 2020-10-29 Manjunath Omana Kuttan , Jan Steinheimer , Kai Zhou , Andreas Redelbach , Horst Stoecker

A deep learning based method with the convolutional neural network (CNN) algorithm for determining the impact parameters is developed using the constrained molecular dynamics model simulations, focusing on the heavy-ion collisions at the…

Nuclear Theory · Physics 2022-04-06 X. Zhang , Y. Huang , W. Lin , X. Liu , H. Zheng , R. Wada , A. Bonasera , Z. Chen , L. Chen , J. Han , R. Han , M. Huang , Q. Hu , Q. Leng , C. W. Ma , G. Qu , P. Ren , G. Tian , Z. Xu , Z. Yang , L. Zhang

Inferences of the nuclear symmetry energy from heavy-ion collisions are currently based on the comparison of measured observables and transport model simulations. Only the expectation values of observables over all considered events are…

Nuclear Theory · Physics 2022-08-24 Yongjia Wang , Zepeng Gao , Hongliang Lü , Qingfeng Li

The impact parameter characterizes the centrality in nucleus-nucleus collision geometry. The determination of impact parameters in real experiments is usually based on the reconstructed particle attributes or the derived event-level…

High Energy Physics - Experiment · Physics 2024-03-28 Botan Wang , Yi Wang , Dong Han , Zhigang Xiao , Yapeng Zhang

Background: The masses of about 2500 nuclei have been measured experimentally, however more than 7000 isotopes are predicted to exist in the nuclear landscape from H (Z=1) to Og (Z=118) based on various theoretical calculations. Exploring…

Nuclear Theory · Physics 2023-11-17 Zepeng Gao , Yongjia Wang , Hongliang Lü , Qingfeng Li , Caiwan Shen , Ling Liu

The validity of impact parameter estimation from the multiplicity of charged particles at low-intermediate energies is checked within the framework of ImQMD model. The simulations show that the multiplicity of charged particles cannot…

Nuclear Theory · Physics 2018-04-25 Li Li , Yingxun Zhang , Zhuxia Li , Nan Wang , Ying Cui , Jack Winkelbauer

Recent progress in machine learning has sparked increased interest in utilizing this technology to predict the outcomes of chemical reactions. The ultimate aim of such endeavors is to develop a universal model that can predict products for…

Chemical Physics · Physics 2025-07-03 Daniel Julian , Jesús Pérez-Ríos

A deep convolutional neural network (CNN) is developed to study symmetry energy $E_{\rm sym}(\rho)$ effects by learning the mapping between the symmetry energy and the two-dimensional (transverse momentum and rapidity) distributions of…

Nuclear Theory · Physics 2021-09-29 Yongjia Wang , Fupeng Li , Qingfeng Li , Hongliang Lü , Kai Zhou

To enable an accurate determination of oscillation parameters, accelerator-based neutrino experiments require detailed simulations of nuclear interaction physics in the GeV regime. While substantial effort from both theory and experiment is…

High Energy Physics - Phenomenology · Physics 2026-03-11 Karla Tame-Narvaez , Steven Gardiner , Aleksandra Ćiprijanović , Giuseppe Cerati

Machine learning techniques have been quite popular recently in the high-energy physics community and have led to numerous developments in this field. In heavy-ion collisions, one of the crucial observables, the impact parameter, plays an…

High Energy Physics - Phenomenology · Physics 2021-10-11 Aditya Nath Mishra , Neelkamal Mallick , Sushanta Tripathy , Suman Deb , Raghunath Sahoo

In proton-nucleus and nucleus-nucleus collision experiments, one determines the centrality of a collision according to the multiplicity or energy deposited in a detector. This serves as a proxy for the true collision centrality, as defined…

Nuclear Theory · Physics 2018-08-03 Rudolph Rogly , Giuliano Giacalone , Jean-Yves Ollitrault

Spiking neural networks (SNNs) represent the most prominent biologically inspired computing model for neuromorphic computing (NC) architectures. However, due to the non-differentiable nature of spiking neuronal functions, the standard error…

Neural and Evolutionary Computing · Computer Science 2020-07-01 Jibin Wu , Yansong Chua , Malu Zhang , Guoqi Li , Haizhou Li , Kay Chen Tan

An accurate impact parameter determination in a heavy ion collision is crucial for almost all further analysis. The capabilities of an artificial neural network are investigated to that respect. A novel input generation for the network is…

Nuclear Theory · Physics 2008-11-26 S. A. Bass , A. Bischoff , J. A. Maruhn , H. Stoecker , W. Greiner

Machine learning algorithms are growing increasingly popular in particle physics analyses, where they are used for their ability to solve difficult classification and regression problems. While the tools are very powerful, they may often be…

High Energy Physics - Phenomenology · Physics 2022-05-26 Alan S. Cornell , Wesley Doorsamy , Benjamin Fuks , Gerhard Harmsen , Lara Mason

Neutrino oscillation experiments aim to measure the neutrino oscillation parameters with accuracy and achieve a complete understanding of neutrino physics. For determining the neutrino oscillation parameters, knowledge of neutrino energy is…

High Energy Physics - Phenomenology · Physics 2021-05-28 Srishti Nagu , Jaydip Singh , Jyotsna Singh , R. B. Singh

The use of machine learning algorithms is an attractive way to produce very fast detector simulations for scattering reactions that can otherwise be computationally expensive. Here we develop a factorised approach where we deal with each…

Data Analysis, Statistics and Probability · Physics 2022-07-26 D. Darulis , R. Tyson , D. G. Ireland , D. I. Glazier , B. McKinnon , P. Pauli

Neural networks, a central tool in machine learning, have demonstrated remarkable, high fidelity performance on image recognition and classification tasks. These successes evince an ability to accurately represent high dimensional…

Machine Learning · Statistics 2023-02-08 Grant M. Rotskoff , Eric Vanden-Eijnden
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