scholarly journals Enhanced production of strange baryons in high-energy nuclear collisions from a multiphase transport model

2020 ◽  
Vol 102 (1) ◽  
Author(s):  
Tianhao Shao ◽  
Jinhui Chen ◽  
Che Ming Ko ◽  
Zi-Wei Lin
Keyword(s):  
Transport Model ◽  
High Energy ◽  
Multiphase Transport ◽  
Nuclear Collisions ◽  
Enhanced Production ◽  
Strange Baryons

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 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 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 Radial Flow in a Multiphase Transport Model at FAIR Energies

2018 ◽  
Vol 2018 ◽  
pp. 1-9
Author(s):  
Soumya Sarkar ◽  
Provash Mali ◽  
Somnath Ghosh ◽  
Amitabha Mukhopadhyay
Keyword(s):  
Transport Model ◽  
Hadron Collider ◽  
Heavy Ion ◽  
High Energy ◽  
Charged Hadron ◽  
Radial Expansion ◽  
Relativistic Heavy Ion Collider ◽  
Multiphase Transport ◽  
Hadron Multiplicity ◽  
Free Environment

Azimuthal distributions of radial velocities of charged hadrons produced in nucleus-nucleus (AB) collisions are compared with the corresponding azimuthal distribution of charged hadron multiplicity in the framework of a multiphase transport (AMPT) model at two different collision energies. The mean radial velocity seems to be a good probe for studying radial expansion. While the anisotropic parts of the distributions indicate a kind of collective nature in the radial expansion of the intermediate “fireball,” their isotropic parts characterize a thermal motion. The present investigation is carried out keeping the upcoming Compressed Baryonic Matter (CBM) experiment to be held at the Facility for Antiproton and Ion Research (FAIR) in mind. As far as high-energy heavy-ion interactions are concerned, CBM will supplement the Relativistic Heavy-Ion Collider (RHIC) and Large Hadron Collider (LHC) experiments. In this context our simulation results at high baryochemical potential would be interesting, when scrutinized from the perspective of an almost baryon-free environment achieved at RHIC and LHC.

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.

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