相对论强子-核碰撞中重子的成核过程

IF 1.7 4区 物理与天体物理 Q2 PHYSICS, NUCLEAR
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引用次数: 0

摘要

我们提出了一种新的理论方法来描述强子-原子核反应中原子核的重子群化。作为一个例子,我们利用由超相对论量子动力学模型(UrQMD)和统计多碎片模型(SMM)组成的混合方法,探索了在 plab=1.7 GeV 的 π-+C 和 π-+W 碰撞中原子核的产生。超相对论量子动力学模型描述了新重子的产生,以及随着波动向亚核密度的传播而形成的受激重子簇。SMM 描述了这些星团内重子相互作用后产生的终核和超核。我们展示了原核团簇和终核(包括超核)的横向矩、快速性、质量分布和激发能量。UrQMD 和 UrQMD+SMM 模型对不同簇化参数的计算结果与现有的重子生成 HADES 实验数据进行了比较,为未来研究这些反应中原子核和超核的形成提供了一个非常有前景的窗口。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Nucleation of baryons in relativistic hadron-nucleus collisions
We suggest a new theoretical method to describe the baryon clusterization of nuclei in hadron-nucleus reactions. As an example we have explored the nuclei production in π+C and π+W collisions at plab=1.7 GeV by using the hybrid approach consisting of the Ultra Relativistic Quantum Dynamics Model (UrQMD) and the Statistical Multifragmentation Model (SMM). The UrQMD describes the production of new baryons, and the propagation toward the subnuclear densities with the fluctuations leading to the formation of excited baryonic clusters. The SMM describes the production of final nuclei and hypernuclei after interaction of baryons inside these clusters. We demonstrate the transverse momenta, rapidity, mass distributions and excitation energies of both primary clusters and final nuclei (including hypernuclei). The results of the UrQMD and UrQMD+SMM model calculations for different clusterization parameters are compared with the available HADES experimental data on baryon production, providing a very promising window for future research on nuclei and hypernuclei formation in these reactions.
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来源期刊
Nuclear Physics A
Nuclear Physics A 物理-物理:核物理
CiteScore
3.60
自引率
7.10%
发文量
113
审稿时长
61 days
期刊介绍: Nuclear Physics A focuses on the domain of nuclear and hadronic physics and includes the following subsections: Nuclear Structure and Dynamics; Intermediate and High Energy Heavy Ion Physics; Hadronic Physics; Electromagnetic and Weak Interactions; Nuclear Astrophysics. The emphasis is on original research papers. A number of carefully selected and reviewed conference proceedings are published as an integral part of the journal.
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