Strong and Electro-Weak Matter 2026

Session

Heavy Ion Contributions 2

17 Aug 2026, 14:00

F4050 (4th floor) (University of Helsinki Main Building)

85. Real-time stochastic dynamics near a QCD critical point

Thomas Schaefer (North Carolina State University)

17/08/2026, 14:00

Heavy-ion collisions and the quark gluon plasma

talk (30min)

We describe recent results obtained from numerical simulations
of stochastic fluid dynamics near a QCD critical point. We
discuss results for the dynamic critical exponent, the
critical behavior of transport coefficients, and the relaxation
rate of equal-time correlation functions. We also discuss
some exploratory studies of stochastic relativistic fluid
dynamics.

67. Critical Dynamics in QCD Matter

Prof. Lorenz von Smekal (JLU Giessen)

17/08/2026, 14:30

Heavy-ion collisions and the quark gluon plasma

talk (15min)

We study universal aspects of critical dynamics in QCD matter within our real-time formulation of the functional renormalization group (FRG) for dynamical systems with reversible mode couplings. The two most relevant ones for QCD describe the dynamics across the chiral transition and that near the QCD critical point, in the dynamical universality classes of Models G and H, respectively. We use...

46. Momentum azimuthal isotropization during the QGP thermalization

Sergio Barrera Cabodevila (Heidelberg University)

17/08/2026, 14:45

Heavy-ion collisions and the quark gluon plasma

talk (15min)

In this talk, we use the Boltzmann Equation in the Diffusion
Approximation (BEDA) as a tool to understand how the initial state
azimuthal anisotropies are washed out because of the final state
interactions. The interplay of $1\leftrightarrow 2$ and
$2\leftrightarrow 2$ interactions relax the initial anisotropies in a
characteristic manner. We observe how, for an initial anisotropy...

51. (3+1)D event-by-event pre-equilibrium dynamics in heavy-ion collisions

Jie Zhu

17/08/2026, 15:00

Heavy-ion collisions and the quark gluon plasma

talk (15min)

So far a major source of uncertainty in the study of heavy-ion collisions arises from the early time dynamics which includes initial state and pre-equilibrium dynamics. The state-of-the-art framework, \kompost~\cite{Kurkela:2018vqr,Kurkela:2018wud}, employs non-equilibrium Green's functions to propagate the initial energy-momentum tensor to the hydrodynamic phase, yet currently only treats...

71. Lyapunov exponent: Measure of Chaotic Dynamics in Boost-Invariant Glasma

Dr Pooja - (University of Jyväskylä)

17/08/2026, 15:15

Heavy-ion collisions and the quark gluon plasma

talk (15min)

We study the classical chaoticity of the glasma, the far-from-equilibrium gluonic state formed in the early stages of heavy-ion collisions, using 2+1D real-time lattice simulations within the McLerran-Venugopalan model. By monitoring the evolution of small perturbations in boost-invariant color fields, we demonstrate that fluctuations grow exponentially as $\sim \exp(\lambda...

100. Hydrodynamic-attractor-like behaviour in the Glasma

Clemens Werthmann (Ghent University)

17/08/2026, 15:30

Heavy-ion collisions and the quark gluon plasma

talk (15min)

Many model descriptions of the evolution of a heavy ion collision in Bjorken flow feature hydrodynamic attractor behaviour, referring to a quick memory loss mechanism and decay towards a universal time evolution curve that will itself converge to hydrodynamic behaviour. This has so far been observed in kinetic theory and in transient hydrodynamics. In both cases, at very early times, it is not...

43. Neural network enhanced Bayesian global analysis of heavy-ion observables using EbyE-EKRT model and hydrodynamics with dynamical freeze-out

Harri Niemi (University of Jyväskylä), Henry Hirvonen (Vanderbilt University), Dr Jussi Auvinen (University of Wroclaw), Prof. Kari J. Eskola (University of Jyväskylä (FI))

17/08/2026, 15:45

Heavy-ion collisions and the quark gluon plasma

talk (15min)

Bayesian global analysis of measured observables is nowadays a standard method for determining the properties and initial conditions of the hot QCD-matter produced in ultrarelativistic heavy-ion collisions. However, even with surrogate models like Gaussian process emulators (GPEs) reducing the amount of simulations, it can be computationally prohibitively expensive to produce sufficient...