scholarly journals Dynamically Integrated Transport Model for High-energy Nuclear Collisions at \(3 < \sqrt{s_{NN}} < 30\) GeV

2020 ◽  
Author(s):  
Koichi Murase ◽  
Yukinao Akamatsu ◽  
Masayuki Asakawa ◽  
Tetsufumi Hirano ◽  
Masakiyo Kitazawa ◽  
...  
Keyword(s):  
Transport Model ◽  
High Energy ◽  
Nuclear Collisions

scholarly journals Final state hadronic rescattering with UrQMD

2018 ◽  
Vol 171 ◽  
pp. 05003 ◽  
Author(s):  
J. Steinheimer ◽  
V. Vovchenko ◽  
J. Aichelin ◽  
M. Bleicher ◽  
H. Stöcker
Keyword(s):  
Momentum Distribution ◽  
Chemical Equilibrium ◽  
Transport Model ◽  
Local Equilibrium ◽  
High Energy ◽  
Final State ◽  
Nuclear Collisions ◽  
Unstable Particles ◽  
Realistic Description ◽  
Do So

In this talk we discuss the effects of the hadronic rescattering on final state observables in high energy nuclear collisions. We do so by employing the UrQMD transport model for a realistic description of the hadronic decoupling process. The rescattering of hadrons modifies every hadronic bulk observable. For example apparent multiplicity of resonances is suppressed as compared to a chemical equilibrium freeze-out model. Stable and unstable particles change their momentum distribution by more than 30% through rescattering. The hadronic rescattering also leads to a substantial decorrelation of the conserved charge distributions. These findings show that it is all but trivial to conclude from the final state observables on the properties of the system at an earlier time where it may have been in or close to local equilibrium.

scholarly journals JAM: an event generator for high energy nuclear collisions

2019 ◽  
Vol 208 ◽  
pp. 11004
Author(s):  
Yasushi Nara
Keyword(s):  
Fluid Dynamics ◽  
Equation Of State ◽  
Transport Model ◽  
High Energy ◽  
Baryon Density ◽  
Collective Effects ◽  
Event Generator ◽  
Collision Term ◽  
Nuclear Collisions ◽  
Recent Developments

We review recent developments of an event generator JAM microscopic transport model to simulate high energy nuclear collisions, especially at high baryon density regions. Recent developments focus on the collective effects: implementation of nuclear potentials, equation of state (EoS) modified collision term, and dynamical integration of fluid dynamics. With these extensions, we can discuss the EoS dependence of the transverse collective flows.

scholarly journals Studying re-scattering effect in heavy-ion collision through K* production

2015 ◽  
Vol 24 (05) ◽  
pp. 1550041 ◽  
Author(s):  
Subhash Singha ◽  
Bedangadas Mohanty ◽  
Zi-Wei Lin
Keyword(s):  
Transport Model ◽  
Heavy Ion ◽  
High Energy ◽  
Hadronic Phase ◽  
Nuclear Collisions ◽  
Scattering Effect ◽  
Ion Collisions ◽  
Multi Phase ◽  
Ion Collision ◽  
Phase Transport

We have studied the K* production within a multi-phase transport model (AMPT) for Au + Au collisions at [Formula: see text] to understand the hadronic re-scattering effect on the measured yields of the resonance. The hadronic re-scattering of the K* decay daughter particles (π and K) will alter their momentum distribution thereby making it difficult to reconstruct the K* signal through the invariant mass method. An increased hadronic re-scattering effect thus leads to a decrease in the reconstructed yield of K* in the heavy-ion collisions. Through this simulation study, we argue that a decrease in K*/K ratio with the increase in collision centrality necessarily reflects the hadronic re-scattering effect. Since the re-scattering occurs in the hadronic phase and K* has a lifetime of 4 fm/c, we present a toy model-based discussion on using measured K*/K to put a lower limit on the hadronic phase lifetime in high energy nuclear collisions.

scholarly journals Multiplicity fluctuations in high energy hadronic and nuclear collisions

2006 ◽  
Vol 151 (1) ◽  
pp. 363-366 ◽  
Author(s):  
M. Rybczyński ◽  
Z. Włodarczyk ◽  
O.V. Utyuzh ◽  
G. Wilk
Keyword(s):  
High Energy ◽  
Nuclear Collisions
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