### Conveners

#### Wednesday PM: Heavy Ion Physics - theory

- Larisa Bravina (University of Oslo (NO))

#### Wednesday PM: Heavy Ion Physics - experiment

- Larisa Bravina (University of Oslo (NO))

#### Wednesday PM: Contributed talks

- Peter Hansen (University of Copenhagen (DK))

I will discuss recent developments in theory of heavy ion physics. In particular, I will discuss how relativistic fluid dynamics arises from fundamental interactions and how the emergence of collective phenomena can be studied by focusing in questions where the hydrodynamical paradigm is under stress.

Heavy ion physics - experimental results

After the discovery of the Standard Model Higgs boson in 2012, we have entered the era of precision measurements of this particle. The decay to two W bosons constitutes the second largest branching ratio for the decay of the Higgs. An overview of the analysis strategy in the Higgs boson cross section measurement in the H->WW(*)->evμv decay channel performed by the ATLAS experiment will be...

We discuss interference in the limit m^2W/s→0 in the Standard Model Effective Field Theory (SMEFT). Dimension six operators that contribute to ψ¯ψ→ψ′¯1ψ′2ψ′¯3ψ′4 scattering events can experience a suppression of interference effects with the Standard Model in this limit. This occurs for subsets of phase space in some helicity configurations. We show that approximating these scattering events...

The Quark Gluon Plasma (QGP) produced in the Large Hadron Collider (LHC) undergoes a similar evolution to that of our Universe. The collision produces an explosive expansion caused by high pressure gradients and it then cools down, forming free-streaming hadrons. The earliest stages of the Universe are probed through the cosmic microwave background (CMB). In a similar manner to the analysis...

Two-particle angular correlations as a function of pseudorapidity difference, $\Delta\eta$, and azimuthal angle difference, $\Delta\varphi$, are a comprehensive tool which allows the explaration of the underlying physics phenomena of particle production in collisions of both protons and heavy ions. These correlations open up the possibility to study a number of mechanisms simultaneously. Many...

We study the influence of geometric and dynamical anisotropies on the development of flow harmonics and, simultaneously, on the second- and third-order oscillations of femtoscopy radii. The analysis is done within the Monte Carlo event generator HYDJET++, which was extended to dynamical triangular deformations. It is shown that the merely geometric anisotropy provides the results which...

Study of the charmonium states play important role in understanding of the strong interaction. The most interesting charmonium states lie near or above open charm threshold. Nature of such states is of interest to modern physics. Recent lattice calculations have performed the necessary extrapolations and considered spectra as well as certain radiative transitions. The lattice QCD simulations...