### Conveners

#### Femtoscopy and correlation studies in A+A, p+p , p+A and e+-e- collisions at relativistic, intermediate and low energies: Afternoon (1)

- Giuseppe Verde
- Tamas Csorgo (Hungarian Academy of Sciences (HU))

#### Femtoscopy and correlation studies in A+A, p+p , p+A and e+-e- collisions at relativistic, intermediate and low energies: Afternoon (2)

- Tamas Csorgo (Hungarian Academy of Sciences (HU))
- Giuseppe Verde

#### Femtoscopy and correlation studies in A+A, p+p , p+A and e+-e- collisions at relativistic, intermediate and low energies: Morning (1)

- Giuseppe Verde
- Tamas Csorgo (Hungarian Academy of Sciences (HU))

#### Femtoscopy and correlation studies in A+A, p+p , p+A and e+-e- collisions at relativistic, intermediate and low energies: Morning (2)

- Giuseppe Verde
- Tamas Csorgo (Hungarian Academy of Sciences (HU))

This talk will address some of the fundamental questions, related to the applications of the Hanbury-Twiss effect in high energy physics: Is the two-particle HBT correlation function unity plus a positive definitene form – or not? Can it be described by two-particle symmetrization effects – or not? Is the shape of the correlation function a Gaussian – or not? The overview also includes some...

The RHIC beam energy scan program allows for the investigation of the phase diagram of QCD matter by varying the beam energy in the region where the change from crossover to first order phase transition is expected to occur. The nature of the quark-hadron transition can be studied through analyzing the space-time structure of the hadron emission source. One of the best tools to gain...

We present first results on identical pion intensity interferometry (HBT) studied in collisions of Au$(1.23A \mathrm{GeV})$+Au. The data are taken with the HADES spectrometer at SIS18/GSI Darmstadt. We study the dependence of the space-time extent of the pion emitting source on the pair transverse momentum and on the collision centrality. We compare our femtoscopic findings taken at an...

The dependence of BEC parameters on the jet structure of e+e- events (LEP) is discussed. The parametrization provided by the tau-model is used. This parametrization is also found to work well for pp minimum bias events (LHC). The BEC parameters of e+e- and pp events are compared.

Three different experimental techniques used in the measurements of two-particle, quantum-statistical (Bose-Einstein) femtoscopic correlations in proton-proton collisions at 13 TeV are introduced and discussed. Each one of them adopts a different analysis approach, with variable degrees of dependence on Monte Carlo event generator models. These are employed for estimating and correcting the...

The choice of the reference sample is a crucial component of the the Bose-Einstein correlations studies, with a great impact on the results obtained. Four reference samples are discussed. The unlike-sign pairs reference sample is affected by decay products of resonances. The momentum vector rotation of one track of the pair by an angle is found not to sufficiently remove correlations present...

Particle correlations at small relative momenta due to quantum statistics effects and final-state interactions are used to measure the space-time characteristics of particle production on the femtoscopic (fm=10$^{-15}$ m) level in high-energy collisions. Kaons are a convenient tool to study, in particular, for Bose-Einstein correlations. They are less influenced by resonance decays than pions...

We describe fireballs that rehadronize from a perfectly fluid quark matter to a chemically frozen, multi-component hadron gas. In the hydrodynamics of these fireballs, we utilize the lattice QCD equation of state, however, we also apply non-relativistic kinematics for simplicity and clarity. A realistic, linear mass scaling of the slope parameters of the single particle spectra of various...

Femtoscopy is a method used to investigate particle correlations by using the experimentally accessible two-particle momentum correlation function $C_k$. This function can be mathematically obtained by integrating the product of the source function and the two-particle wave function. The main goals of femtoscopy are to investigate the properties of the emission source and the interaction...

The recent results on the theoretical analysis of particle production and

correlation in relativistic heavy-ion collisions at the LHC and RHIC within

the hydrokinetic model (HKM) and its extended version — integrated hydrokinetic

model (iHKM) are addressed. The study of strange K meson spectrum and femtoscopy scales is discussed along with the pion ones for the case of LHC Pb+Pb collisions at...

Collisions of heavy-ions are major method used to study properties of matter. Such studies are performed with comparison of experimental data and model simulations.

One of theoretical description is Parton-Based Gribov-Regge theory included in the phenomenological model EPOS. It was originally created to explain the processes at the highest energies obtained with LHC complex. EPOS gives...