A5080480279- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Pulsars and Gravitational Waves Research
- Cosmology and Gravitation Theories
- Nuclear physics research studies
- Astro and Planetary Science
- Cold Atom Physics and Bose-Einstein Condensates
- Computational Fluid Dynamics and Aerodynamics
- Nuclear reactor physics and engineering
- Astrophysics and Star Formation Studies
- Fluid Dynamics and Vibration Analysis
- Superconducting Materials and Applications
- Wind and Air Flow Studies
- Stellar, planetary, and galactic studies
- Fluid Dynamics and Turbulent Flows
GSI Helmholtz Centre for Heavy Ion Research
2018-2025
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
2023
Goethe University Frankfurt
2016-2022
Forschungszentrum Jülich
2018-2022
John von Neumann Institute for Computing
2018-2022
University of Jyväskylä
2019-2021
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
2014-2021
Helsinki Institute of Physics
2019-2021
University of Helsinki
2019-2021
Frankfurt Institute for Advanced Studies
2016-2019
We present an improved version of the ECHO-QGP numerical code, which self-consistently includes for first time effects electromagnetic fields within framework relativistic magneto-hydrodynamics (RMHD). discuss results its application in heavy-ion collisions limit infinite electrical conductivity plasma. After reviewing relevant covariant $$3+1$$ formalisms, we illustrate implementation evolution equations code and show several tests aimed at assessing accuracy robustness implementation....
We present a quantitative study of vorticity formation in peripheral ultrarelativistic heavy ion collisions at sqrt(s)NN = 200 GeV by using the ECHO-QGP numerical code, implementing relativistic dissipative hydrodynamics causal Israel-Stewart framework 3+1 dimensions with an initial Bjorken flow profile. consider and discuss different definitions which are relevant hydrodynamics. After demonstrating excellent capabilities our proves to be able reproduce Gubser up 8 fm/c, we show that,...
We present , a new numerical code to simulate the evolution of matter created in heavy-ion collisions presence electromagnetic fields. It is derived from Black Hole Accretion Code (), which has been designed model astrophysical processes general-relativistic magnetohydrodynamical description. As original Code, benefits use adaptive mesh refinement, allows us dynamically adjust resolution where necessary and makes time-dependent Milne coordinates ultrarelativistic equation state, <a:math...
We present , a numerical code to simulate the evolution of matter created in heavy-ion collisions. is based on Black Hole Accretion Code (), which has been designed model astrophysical processes through solution equations general-relativistic magnetohydrodynamics. Like mother code, uses adaptive mesh refinement, allows for dynamic adjustment resolution regions computational domain where particularly high accuracy needed. here discuss number applications Au-Au collisions at BNL Relativistic...
We implement a Langevin approach for the transport of heavy quarks in ultrarelativistic quantum molecular dynamics (UrQMD) hybrid model, which uses model UrQMD to determine realistic initial conditions hydrodynamical evolution quark gluon plasma and charm bottom quarks. It provides description background medium relativistic ion collisions. The diffusion is simulated with approach, using two sets drag coefficients, one based on $T$-matrix resonance elastic scattering within medium. In case we...
Abstract At the earliest times after a heavy-ion collision, magnetic field created by spectator nucleons will generate an extremely strong, albeit rapidly decreasing in time, field. The impact of this may have detectable consequences, and is believed to drive anomalous transport effects like Chiral Magnetic Effect (CME). We detail exploratory study on dynamical hydrodynamic medium collisions two ultrarelativistic heavy-ions, using framework numerical ideal MagnetoHydroDynamics (MHD) with...
To assess the degree of equilibration matter created in heavy-ion reactions at low to intermediate beam energies, a hadronic transport approach (SMASH) is employed. By using coarse-graining method, we compute energy momentum tensor system fixed time steps and evaluate isotropy diagonal terms relative magnitude off-diagonal terms. This study focuses mostly on Au+Au collisions range $\sqrt{s_{\rm NN}}$ = 2.4-7.7 GeV, but central lighter ions like C+C, Ar+KCl Ag+Ag are considered as well. We...
We provide evidence from full numerical solutions that the hydrodynamical evolution of initial density fluctuations in heavy ion collisions can be understood order-by-order a perturbative series deviations smooth and azimuthally symmetric background solution. To leading linear order, modes with different azimuthal wave numbers do not mix. When quadratic higher order corrections are numerically sizable, they as overtones corresponding series. Several findings reported recent literature result...
We introduce a novel approach based on elastic and inelastic scattering rates to extract the hyper-surface of chemical freeze-out from hadronic transport model in energy range E$_\mathrm{lab}=1.23$ AGeV $\sqrt{s_\mathrm{NN}}=62.4$ GeV. For this study, Ultra-relativistic Quantum Molecular Dynamics (UrQMD) combined with coarse-graining method is employed. The distribution reconstructed pions through several decay re-formation chains involving resonances taking into account inelastic,...
The nuclear equation of state (EOS) is at the center numerous theoretical and experimental efforts in physics. With advances microscopic theories for interactions, availability experiments probing matter under conditions not reached before, endeavors to develop sophisticated reliable transport simulations interpret these experiments, advent multi-messenger astronomy, next decade will bring new opportunities determining EOS, elucidating its dependence on density, temperature, isospin...
The HADES experiment at GSI has recently provided data on the flow coefficients v1,...,v4 for protons in Au+Au reactions Elab=1.23AGeV (or sNN=2.4GeV). This allows to estimate shear viscosity over entropy density ratio, η/s low energies via a coarse graining analysis of UrQMD transport simulations harmonics comparison experimental data. By this we can provide first time an η/s≈0.65±0.15 (8±2)(4π)−1) such energies.
We show that the inclusion of a recently found additional term spin polarization vector at local equilibrium which is linear in symmetrized gradients velocity field, and assumption hadron production constant temperature restore quantitative agreement between hydrodynamic model predictions measurements relativistic heavy ion collisions sqrt[s_{NN}]=200 GeV. The longitudinal component turns out to be very sensitive value, with good fit around 155 MeV. implications this finding are discussed.
Using the UrQMD/coarse graining approach we explore kinetic freeze-out stage in central Au + collisions at various energies. These studies allow us to obtain detailed information on thermodynamic properties (e.g. temperature and chemical potential) of system during decoupling stage. We five relevant collision energies detail, ranging from $\sqrt{s_{NN}}=2.4\,\mathrm{GeV}$ (GSI-SIS) $\sqrt{s_{NN}}=200\,\mathrm{GeV}$ (RHIC). By adopting a standard Hadron Resonance Gas equation state, determine...
The polarization of the Λ hyperon has become an important probe Quark-Gluon Plasma produced in relativistic heavy-ion collisions. Recently, it been found that receives a substantial contribution from local equilibrium term proportional to symmetric derivative four-temperature vector, thermal shear tensor. We show that, at very high energies, this can restore agreement between experimental measurements and predictions hydrodynamic model, provided hadronization hypersurface is isothermal....
We present BHAC-QGP, a new numerical code to simulate the evolution of matter created in heavy-ion collisions. BHAC-QGP is based on Black Hole Accretion Code (BHAC), which has been designed model astrophysical processes through solution equations general-relativistic magnetohydrodynamics. Like mother code, uses Adaptive Mesh Refinement (AMR), allows for dynamic adjustment resolution regions computational domain where particularly high accuracy needed. here discuss number applications Au-Au...
It is believed that very strong magnetic fields may induce many interesting physical effects in the Quark Gluon Plasma, like Chiral Magnetic Effect, Separation a modification of critical temperature or changes collective flow emitted particles. However, hydrodynamic numerical simulations Heavy Ion Collisions have been either neglected considered as external which evolve independently from dynamics fluid. To address this issue, we recently modified ECHO-QGP code, including for first time...
We present a study of the elliptic flow and $R_{AA}$ D anti-D mesons in Au+Au collisions at FAIR energies. propagate charm quarks following previously applied Langevin dynamics. The evolution background medium is modeled two different ways: (I) we use UrQMD hydrodynamics + Boltzmann transport hybrid approach including phase transition to QGP (II) with coarse-graining employing also an equation state QGP. latter has been used describe di-lepton data various energies very successfully. This...
High angular resolution spectra obtained with the Hubble Space Telescope Imaging Spectrograph (HST/STIS) provide rich morphological and kinematical information about stellar jet phenomenon, which allows us to test theoretical models efficiently. In this work, numerical simulations of jets in propagation region are executed PLUTO code, by adopting inflow conditions that arise from former magnetized outflows, accelerated disk-wind mechanism launching region. By matching two regions,...