Proceedings, Volume 10, 2019

These proceedings report preliminary measurements of correlations between mid-rapidity charged tracks and high-rapidity event activity (EA) at STAR for $\sqrt{s_{\mathrm{NN}}}=200GeV$ p+Au collisions taken in 2015. These correlations are intriguing be...

This proceedings reviews recent progress in the study of far-from-equilibrium hydrodynamization process of strongly interacting matter in the vicinity of a critical point. From a full non-linear evolution of a gravitational theory dual to a conformal...

The low-mass dielectron production in pp collisions at $\sqrt{s}$ = 13 TeV was measured by ALICE with a reduced field of the ALICE central barrel solenoid magnet. This increases the reconstruction efficiency of low- $p_{\mathrm{T}}$ electrons and allows a b...

At the Large Hadron Collider (LHC) a significant production of (anti-)(hyper-)nuclei is observed in proton-proton (pp), proton-lead (p-Pb) and lead-lead (Pb-Pb) collisions. The measurement of the production yields of light (anti-)nuclei is extremely...

In this work, we strive to gain insight into thermal modifications of charmonium and bottomonium bound states as well as the heavy quark diffusion coefficient. The desired information is contained in the spectral function which can not be calculated...

In ultra-relativistic heavy-ion collisions, creation of a novel state of matter, the quark-gluon plasma (QGP), has been observed. Suppressed production of quarkonia, caused by the colour screening of the binding force, has been proposed as a direct e...

We present a model of the dynamical evolution of relativistic heavy ion collisions, which combines second-order viscous hydrodynamics and microscopic transport. In particular, we present a hybrid approach with MUSIC hydrodynamics, and SMASH (Simulati...

It has been shown that holographic black holes, constructed to mimic the equation of state of QCD computed on the lattice at finite temperature and zero density, display critical behavior at large baryonic chemical potential. In this proceedings, we...

These proceedings summarise the first measurements of anisotropic flow coefficients $v_{\mathrm{n}}$ , $2\le \mathrm{n}\le 4$ , for inclusive charged particles at mid-rapidity in Xe–Xe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44\mathrm{TeV}$ . The results are compared with t...

We study the path length dependence of energy-loss in the Quark Gluon Plasma (QGP) by measuring the azimuthal anisotropy coefficient and transverse momentum ( $p_{\mathrm{T}}$ ) spectra for charged hadrons in Au + Au at $\sqrt{s_{NN}}$ = 200 $\mathrm{GeV}$ at...

The azimuthal correlations between heavy-flavour hadrons or heavy-flavour decay electrons with charged particles in Pb-Pb collisions give insight on the modification of charm-jet properties in nucleus-nucleus collisions and the mechanisms through whi...

In this proceedings, we review the basics of quasiparticle anisotropic hydrodynamics (aHydroQP). Then we present phenomenological comparisons between 3+1d quasiparticle anisotropic hydrodynamics and experimental data from RHIC experiments at 200 GeV...

In these proceedings, we present measurements of open bottom hadron production through multiple decay channels in Au + Au collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}$ = 200 GeV by the STAR experiment. Specifically, measurements of nuclear modification factors for...

André Mischke, a former organizer of the Hot Quarks international workshop, passed away at the age of 46 on Thursday 8 November 2018 due to a severe illness he fought for over a year. [...]

The 8th edition of the Workshop for Young Scientists on the Physics of Ultrarelativistic [...]

Heavy flavor (HF) quarks (charm, bottom) are important probes of the medium produced in relativistic heavy-ion collisions because they are formed in the early stage and propagate throughout the lifetime of the system. HF-meson spectra and azimuthal a...

Charm quarks are produced via hard parton scattering in ultra-relativistic heavy-ion collisions, hence are ideal probes to study a possible de-confined state of matter, known as Quark Gluon Plasma (QGP). The angular correlation of a meson containing...

We use the Color Glass Condensate (CGC) effective field theory (EFT) to calculate inclusive photon production to leading order $qg\to q\gamma$ , (LO), and next-to leading order $gg\to q\overline{q}\gamma$ (NLO) at LHC energies. These processes dominate...

We aim to describe the process of dissociation and recombination of quarkonia in the quark-gluon plasma. Therefore we developed a model which allows to observe the time evolution of a system with various numbers of charm-anticharm-quark pairs at diff...

We discuss the diffusion currents occurring in a dilute system and show that the charge currents do not only depend on gradients in the corresponding charge density, but also on the other conserved charges in the system—the diffusion currents a...

Direct photons are a unique probe to study the properties of the medium created in heavy ion collisions. Low transverse momentum ( $p_T$ ) direct photons are of special interest since thermal photons are supposed to be dominant, while at high $$...

The PHENIX and STAR Collaborations at the Relativistic Heavy-Ion Collider and ALICE, CMS, ATLAS and LHCb Collaborations at the Large Hadron Collider have measured the production of charmonium and bottonium states as well as open heavy flavor hadrons...

The ALICE Collaboration measured dielectron production as a function of the invariant mass ( $m_{\mathrm{ee}}$ ), the pair transverse momentum ( $p_{\mathrm{T},\mathrm{ee}}$ ) and the pair distance of closest approach ( ${\mathrm{DCA}}_{\mathrm{ee}}$ ) in pp collisions at $\sqrt{s}=7$...

We report recent measurements of mesonic resonance production in pp, p–Pb, Pb–Pb and Xe–Xe collision systems with the ALICE detector at LHC energies. Integrated particle yields, mean transverse momenta and particles ratios of mesonic resonances like...

We have extended the hadron resonance gas (HRG) model by including the effect of both attractive and repulsive interaction in the scattering matrix (S-matrix) formalism. The attractive part of the interaction is calculated using K-matrix formalism wh...

We are developing a software for energy loss simulation which is affected by jets in the nuclear matter described by relativistic hydrodynamics. Our program uses a Cartesian coordinate system in order to provide high spatial resolution for the analys...

Resonance particles, such as the K*(892) meson, are reconstructed from the invariant mass (M ${}_{inv}$ ) distribution of possible particle pairs. To extract the yield with the highest precision, the combinatorial background must be determined as...

A Large Ion Collider Experiment (ALICE) at the Large Hadron collider (LHC) is a heavy-ion dedicated experiment designed to study nuclear matter at extreme condition of high temperature and high density at which quarks are deconfined and give rise to...

The inclusive production of the charmonium state $\psi \left(2\mathrm{S}\right)$ was studied in p-Pb and Pb-Pb collisions at $\sqrt{{\mathit{s}}_{\mathrm{NN}}}$ = 8.16 TeV and 5.02 TeV respectively, using the ALICE detector at the CERN LHC. The $\psi \left(2\mathrm{S}\right)$ is less bound than the...

We have formulated a new model for collisions with nuclei, called Angantyr, which is now included in PYTHIA8 event generator. The model is inspired by the old Fritiof model, but also includes effects of hard partonic interactions. It uses a Glauber m...

Charmed baryons and their corresponding baryon-to-meson ratios are important tools to understand hadronisation processes in the Quark-Gluon Plasma produced in heavy-ion collisions. Recent Run 2 measurements in p–Pb collisions at 5.02 TeV, performed w...

Azimuthal correlation studies of heavy-flavour particles with charged particles in p–Pb collisions can give an insight into the cold nuclear matter effects on heavy-quark production and hadronization into heavy-flavour jets. Multiplicity-dependent me...

The phenomenon of jet quenching indicates that partons lose energy as they traverse the hot dense medium. By restricting a trigger jet in azimuth relative to the event plane, we are given another tool, which allows us to study the path length depende...

The first measurements of isospin fluctuations in the kaon sector is presented in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV. A robust statistical observable was used to extract the isospin fluctuations of neutral and charged kaons as a functio...

In the first part of this work we study the color coherence phenomenon by considering the well-known quark-antiquark antenna with an in-medium hard gluon emission and an extra very soft emission outside it—double antenna. By discussing the cohe...

A new form of fragmentation function is presented here, motivated by earlier non-extensive studies of jet fragmentation. We parametrized our Tsallis-like function on pion spectra and compared it to the most common fragmentation function parametrizati...

The soft-gluon approximation assumes that a high $p_{\perp }$ parton propagating through dense QCD matter loses only a small amount of its energy via gluon radiation. This assumption is made in many different jet quenching approaches, which never...

This paper presents a comparative study of forward-backward correlations and multiplicity fluctuations in experimental data and in HIJING Monte Carlo simulations of Pb–Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV. The analysis focuses on two observ...

The azimuthal dependence of the two-particle distribution, which reflects both the anisotropic flow of each particle and azimuthally sensitive correlations between the two particles, can be characterized with Fourier coefficients. We illustrate on a...

Considering the kinetic Boltzmann equation in the limit of very few collisions, we study the evolution of the phase space distribution of bottomonia interacting with an expanding gas of massless partons. We investigate the scaling of the anisotropic...

HIJING++ (Heavy Ion Jet INteraction Generator) is the successor of the widely used original HIJING, developed almost three decades ago. While the old versions (1.x and 2.x) were written in FORTRAN, HIJING++ was completely rewritten in C++. During the...

Recently, a comprehensive Bayesian analysis was performed to simultaneously extract the values of a number of hydrodynamic parameters necessary for compatibility with a limited set of experimental data from the LHC. In this work, this best-fit model...

The deuteron binding energy is only 2.2 MeV. At the same time, its yield in Pb+Pb collisions at $\sqrt{sNN}$ = 2.76 TeV corresponds to a thermal yield at the temperature around 155 MeV, which is too hot to keep deuterons bound. This puzzle is not comp...

We argue that the inferred ratio of shear viscosity to entropy density of the quark-gluon plasma, h/s < 0.5 near the deconfinement temperature Tc, can be understood from perturbative QCD. To rebut opposite views, we first show that the existing l...

I give an introductory overview of the search for the critical point in the phase diagram of QCD in the context of heavy-ion collisions from a theoretical perspective. The focus is on static and dynamic critical physics and the corresponding properti...

The hadronization process of heavy hadrons with bottom and charm quarks, especially for baryons ${\Lambda }_c$ , in a dense QGP medium is largely not understood. We present within a coalescence plus fragmentation model the predictions for $D^0$ and...

Charm quarks are primarily produced at the early stages of ultra-relativistic heavy-ion collisions and can therefore probe the quark-gluon plasma throughout its whole evolution. Final-state open-charm hadrons are commonly used to experimentally study...

The changing shape of the rapidity spectrum of net protons over the SPS energy range is still lacking theoretical understanding. In this work, a model for string excitation and string fragmentation is implemented for the description of high energy co...

We study the charged event multiplicity dependence of the jet structure in pp collisions. We present evidence for jet shape modification due to multi-parton interactions using PYTHIA and HIJING++ Monte Carlo (MC) event generators as an input to our a...

In high-energy hadron collisions, direct photons can be produced in various processes and are of particular interest to study the hot QCD medium since they escape it without being affected. These proceedings present the latest ALICE experiment result...