Parton-Hadron-Quantum-Molecular Dynamics (PHQMD) -- A Novel Microscopic N-Body Transport Approach for Heavy-Ion Collisions, Dynamical Cluster Formation and Hypernuclei Production

Autor: Elena Bratkovskaya, Yvonne Leifels, V. Voronyuk, Jörg Aichelin, Gabriele Coci, V. Kolesnikov, V. Kireyeu, A. Le Fèvre
Přispěvatelé: Laboratoire de physique subatomique et des technologies associées (SUBATECH), Université de Nantes - Faculté des Sciences et des Techniques, Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST)
Rok vydání: 2019
Předmět:
hypernucleus: formation
heavy ion: scattering
Nuclear Theory
energy: symmetry
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th]
Hadron
model: coalescence
FOS: Physical sciences
Parton
Wigner
Relativistic Nuclear Collisions
01 natural sciences
nuclear matter: equation of state
Many-body problem
Nuclear physics
mass spectrum: transverse
Nuclear Theory (nucl-th)
numerical calculations: interpretation of experiments
High Energy Physics - Phenomenology (hep-ph)
mean field approximation
cluster: formation
0103 physical sciences
Cluster (physics)
transport theory
matter: hadronic
Rapidity
010306 general physics
Nuclear Experiment
quark gluon: plasma
Darmstadt SIS
Brookhaven RHIC Coll
quantum chromodynamics: matter
Physics
010308 nuclear & particles physics
High Energy Physics::Phenomenology
High Energy Physics - Phenomenology
rapidity spectrum
hypernucleus: production
density dependence
[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
Quark–gluon plasma
many-body problem
Transverse mass
quantum molecular dynamics
Nucleon
Zdroj: Physical Review C
Physical Review C, American Physical Society, 2020, 101 (4), pp.044905. ⟨10.1103/PhysRevC.101.044905⟩
ISSN: 2469-9985
2469-9993
DOI: 10.48550/arxiv.1907.03860
Popis: Cluster and hypernuclei production in heavy-ion collisions is presently under active experimental and theoretical investigation. Since clusters are weekly bound objects, their production is very sensitive to the dynamical evolution of the system and its interactions. The theoretical description of cluster formation is related to the n-body problem. Here we present the novel n-body dynamical transport approach PHQMD (Parton-Hadron-Quantum-Molecular Dynamics) which is designed to provide a microscopic description of nuclear cluster and hypernucleus formation as well as of general particle production in heavy-ion reactions at relativistic energies. In difference to the coalescence or statistical models, often used for the cluster formation, in PHQMD clusters are formed dynamically due to the interactions between baryons described on a basis of Quantum Molecular Dynamics (QMD)which allows to propagate the n-body Wigner density and n-body correlations in phase-space, essential for the cluster formation. The clusters are identified by the MST (Minimum Spanning Tree) or the SACA ('Simulated Annealing Cluster Algorithm') algorithm which finds the most bound configuration of nucleons and clusters. Collisions among hadrons as well as Quark-Gluon-Plasma formation and parton dynamics in PHQMD are treated in the same way as in the established PHSD (Parton-Hadron-String Dynamics)transport approach. In order to verify our approach with respect to the general dynamics we present here the first PHQMD results for general 'bulk' observables such as rapidity distributions and transverse mass spectra for hadrons ($\pi, K, \bar K, p, \bar p, \Lambda, \bar \Lambda$) from SIS to RHIC energies. We find a good description of the 'bulk' dynamics which allows us to proceed with the results on cluster production, including hypernuclei.
Comment: 28 pages, 29 figures; extended version to be published in Phys. Rev. C
Databáze: OpenAIRE
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