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medium effects in ΛK~＋ pair production by 2.83 GeV protons on nuclei

Chinese Physics C 2017年第12期41卷 88-105页

作者： E. Ya. Paryev M. Hartmann Yu. T. Kiselev Institute for Nuclear Research Russian Academy of Sciences Moscow 117312 Russia Institute for Theoretical and Experimental Physics Moscow 117218 Russia Institut für Kernphysik and Jülich Centre for Hadron Physics Forschungszentrum Jiilich D-52425 Jiilich Germany

We study ΛK~＋ pair production in the interaction of protons of 2.83 GeV kinetic energy with C, Cu,Ag, and Au target nuclei in the framework of the nuclear spectral function approach for incoherent primary proton–nucleon and secondary pion–nucleon production processes, and processes associated with the creation of intermediate Σ~0K~＋ pairs. The approach accounts for the initial proton and final Λ hyperon absorption, final K~＋ meson distortion in nuclei, target nucleon binding, and Fermi motion, as well as nuclear mean-field potential effects on these *** calculate the Λ momentum dependence of the absolute ΛK~＋ yield from the target nuclei considered, in the kinematical conditions of the ANKE experiment, performed at COSY, within the different scenarios for the Λ-nucleus effective scalar potential. We show that the above observable is appreciably sensitive to this potential in the low-momentum region. Therefore, direct comparison of the results of our calculations with the data from the ANKE-at-COSY experiment can help to determine the above potential at finite momenta. We also demonstrate that the two-step pion–nucleon production channels dominate in the low-momentum ΛK~＋ production in the chosen kinematics and, therefore, they have to be taken into account in the analysis of these data.

关键词： proton-nucleus reactions medium effects hyperon nuclear potential

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Influence of medium effects on the rotating hybrid stars

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Chinese Physics C 2010年第11期34卷 1696-1699页

作者：康缈周霞王晓东衡耀付 College of Physics and Electronics Henan University Urumqi Observatory NAOsCAS40-5 South Beijing Road Department of Electronic Science and Engineering Huanghuai University

A hybrid star with a pure quark core,a hadron crust and a mixed phase between the two is *** relativistic mean field model for hadron matter and the effective mass bag model for quark matter are used to construct the equation of state for hybrid *** influences of medium effects that are parameterized by the strong coupling constant have been discussed on the configuration of rotating *** strong coupling constant is a prominent factor that influences the properties of rotating hybrid stars.

关键词： hybrid stars rotation medium effects

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High-energy nuclear physics meets machine learning

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Nuclear Science and Techniques 2023年第6期34卷 9-41页

作者： Wan-Bing He Yu-Gang Ma Long-Gang Pang Hui-Chao Song Kai Zhou Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai200433China Shanghai Research Center for Theoretical Nuclear Physics NSFC and Fudan UniversityShanghai200438China Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics(MOE) Central China Normal UniversityWuhan430079China School of Physics and Center for High Energy Physics Peking UniversityBeijing100871China Frankfurt Institute for Advanced Studies(FIAS) 60438Frankfurt am MainGermany

Although seemingly disparate,high-energy nuclear physics(HENP)and machine learning(ML)have begun to merge in the last few years,yielding interesting *** is worthy to raise the profile of utilizing this novel mindset from ML in HENP,to help interested readers see the breadth of activities around this *** aim of this mini-review is to inform the community of the current status and present an overview of the application of ML to *** different aspects and using examples,we examine how scientific questions involving HENP can be answered using ML.

关键词： Heavy-ion collisions Machine learning Initial state Bulk properties medium effects Hard probes Observables

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