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The structure of heavy nuclei is difficult to disentangle in high-energy heavy-ion collisions. The deep convolution neural network (DCNN) might be helpful in mapping the complex final states of heavy-ion collisions to the nuclear structure…

Nuclear Theory · Physics 2019-06-26 Long-Gang Pang , Kai Zhou , Xin-Nian Wang

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

The deep learning technique has been applied for the first time to investigate the possibility of centrality determination in terms of the number of participants ($N_{\mathrm{part}}$) in high-energy heavy-ion collisions. For this purpose,…

High Energy Physics - Phenomenology · Physics 2023-08-16 Dipankar Basak , Kalyan Dey

This mini-review summarizes the general setup and some highlight results from the hadronic transport approach SMASH (Simulating Many Accelerated Strongly-interacting Hadrons). We start by laying out the software development structures as…

Nuclear Theory · Physics 2025-09-01 Hannah Elfner , Renan Góes-Hirayama

$\alpha$-clustering structure is a significant topic in light nuclei. A Bayesian convolutional neural network (BCNN) is applied to classify initial non-clustered and clustered configurations, namely Woods-Saxon distribution and…

High Energy Physics - Phenomenology · Physics 2021-10-13 Junjie He , Wan-Bing He , Yu-Gang Ma , Song Zhang

The coordinate and momentum space configurations of the net baryon number in heavy ion collisions that undergo spinodal decomposition, due to a first-order phase transition, are investigated using state-of-the-art machine-learning methods.…

Nuclear Theory · Physics 2019-12-23 Jan Steinheimer , LongGang Pang , Kai Zhou , Volker Koch , Jørgen Randrup , Horst Stoecker

Microscopic transport approaches are the tool to describe the non-equilibrium evolution in low energy collisions as well as in the late dilute stages of high-energy collisions. Here, a newly developed hadronic transport approach, SMASH…

Nuclear Theory · Physics 2019-02-20 Hannah Petersen , Dmytro Oliinychenko , Markus Mayer , Jan Staudenmaier , Sangwook Ryu

The space-time picture of hadron formation in high-energy collisions with nuclear targets is still poorly known. The tests of hadron formation was suggested for the first stage of SPD running. They will require measuring charged pion and…

Instrumentation and Detectors · Physics 2024-08-22 R. Pandey

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

The global observable distributions of nucleus-nucleus collisions at high energy are studied. It is shown that these distributions are sensitive to interaction dynamics and can be used to investigate the evolution of dense nuclear matter.…

High Energy Physics - Phenomenology · Physics 2009-12-15 M. V. Savina , S. V. Shmatov , N. V. Slavin , P. I. Zarubin

The microscopic description of heavy-ion reactions at low beam energies is achieved within hadronic transport approaches. In this article a new approach SMASH (Simulating Many Accelerated Strongly-interacting Hadrons) is introduced and…

The transport approach is a useful tool to study dynamics of non-equilibrium systems. For heavy-ion collisions at intermediate energies, where both the smooth nucleon potential and the hard-core nucleon-nucleon collision are important, the…

Nuclear Theory · Physics 2019-04-02 Jun Xu

$\alpha$-clustered structures in light nuclei could be studied through "snapshots" taken by relativistic heavy-ion collisions. A multiphase transport (AMPT) model is employed to simulate the initial structure of collision nuclei and the…

High Energy Physics - Phenomenology · Physics 2020-11-18 Yi-An Li , Song Zhang , Yu-Gang Ma

In hydrodynamical modeling of heavy-ion collisions, the initial-state spatial anisotropies are translated into momentum anisotropies of the final-state particle distributions. Thus, understanding the origin of the initial-state anisotropies…

High Energy Physics - Phenomenology · Physics 2012-03-12 M. Alvioli , H. Holopainen , K. J. Eskola , M. Strikman

There is increasing interest in using high-energy collisions to probe the structure of nuclei, in particular with the high-precision data made possible by collisions performed with pairs of isobaric species. A systematic study requires a…

Nuclear Theory · Physics 2023-05-26 Matthew Luzum , Mauricio Hippert , Jean-Yves Ollitrault

A novel machine learning approach is used to provide further insight into atomic nuclei and to detect orderly patterns amidst a vast data of large-scale calculations. The method utilizes a neural network that is trained on ab initio results…

Nuclear Theory · Physics 2022-03-14 O. M. Molchanov , K. D. Launey , A. Mercenne , G. H. Sargsyan , T. Dytrych , J. P. Draayer

Heavy-ion experiments provide a new opportunity to gain a deeper understanding of the structure of nuclei. To achieve this, it is crucial to identify observables under circumstances that are minimally affected by the process that leads to…

Nuclear Theory · Physics 2024-06-21 S. M. A. Tabatabaee , S. F. Taghavi

Convolutional Neural Nets, which is a powerful method of Deep Learning, is applied to classify equation of state of heavy-ion collision event generated within the UrQMD model. Event-by-event transverse momentum and azimuthal angle…

Nuclear Theory · Physics 2020-07-23 Yu. Kvasiuk , E. Zabrodin , L. Bravina , I. Didur , M. Frolov

In hydrodynamicalmodeling of heavy-ion collisions the initial state spatial anisotropies translate into momentum anisotropies of the final state particle distributions. Thus, understanding the origin of the initial anisotropies and…

High Energy Physics - Phenomenology · Physics 2012-06-26 M. Alvioli , H. Holopainen , K. J. Eskola , M. Strikman

Recently, a method was developed for implementing arbitrary short-range nucleon-nucleon correlations in Monte Carlo sampled nuclei (as well as deformations of the 1-body nuclear density). We use this method to implement realistic 2-body…

Nuclear Theory · Physics 2023-12-19 Matthew Luzum , João Paulo Picchetti , Mauricio Hippert , Jean-Yves Ollitrault
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