Jet-medium interactions in the Quark-Gluon Plasma can receive large non-perturbative infrared contributions. These contributions affect transverse jet momentum broadening and jet quenching. Both are influenced by the modified in-medium dispersion of jets encoded in their asymptotic mass.

An IR-safe computation of the latter requires subtracting the unphysical UV limit of electrostatic QCD...

A new approach is presented to explore the singularity structure of lattice QCD in the complex chemical potential and fugacity plane [1, 2, 3]. Our method can be seen as a combination of the Taylor expansion and analytic continuation approaches. Its novelty lies in using rational (Padé) approximants for studying Lee Yang edge singularities, which provide valuable insights to the occur- rence...

Fluctuations of conserved charges in a grand canonical ensemble

can be computed on the lattice and, thus, provide theoretical

input for freeze-out phenomenology. Electric charge fluctuations

and the corresponding higher order correlators are extremely

difficult, suffering form the most severe lattice artefacts.

We present new simulation data with a novel discretization where

these...

Lattice QCD simulations have shown unequivocally that the transition from hadrons to quarks and gluons is a crossover when the baryon chemical potential is zero or small. Many model calculations predict the existence of a critical point at a value of the chemical potential where current lattice simulations are unreliable. We show how to embed a critical point in a smooth background equation...

In the context of the search for the QCD critical point using

non-Gaussian fluctuations, we obtain the evolution equations for

non-Gaussian cumulants within hydrodynamics to leading order of the

systematic expansion in the magnitude of thermal fluctuations. We

develop diagrammatic technique in which the leading order

contributions are given by tree diagrams. We introduce the concept of

...

We show that the values of the first three cumulants of the baryon number distribution can be used to calculate the isothermal speed of sound and its logarithmic derivative with respect to the baryon number density. We discuss application of this result to heavy-ion collision experiments and address possible challenges, including effects due to baryon number conservation, differences between...

During the evolution of a heavy ion collision, the system passes close to the O(4) critical point. The order parameter that controls the chiral symmetry is the quark condensate $\langle \bar q q \rangle \sim \phi_a $. Due to the non-zero quark mass, there is a crossover (not a second order phase transition) between the high and low temperature phases. In this talk we will introduce the...