Conveners
Parallel Session - Collective dynamics I
- Raimond Snellings (Nikhef National institute for subatomic physics (NL))
ATLAS measurements of flow harmonics ($v_{n}$) and their fluctuations in Pb+Pb and Xe+Xe collisions covering a wide range of transverse momenta, pseudorapidity and collision centrality are presented. The $v_{n}$ are measured up to $n=7$ using the two-particle correlations, multi-particle cumulants and scalar product methods.The $v_{n}$ for $n$=2-7 is obtained with various correlation methods,...
Studies of longitudinal de-correlation of anisotropic flow provide unique constraints on the initial conditions and dynamical evolution of the quark-gluon-plasma in heavy-ion collisions. With data collected by the STAR experiment at RHIC, the factorization ratio for flow harmonics, $r_n(\eta^a, \eta^b) (n = 2, 3)$, are obtained over a wide $\eta$ range for 27 and 54.4 GeV Au+Au collisions as a...
In heavy-ion collisions, it is well-established that geometrical shapes of the initial density distribution in transverse plane are responsible for the observed harmonic flow, through the hydrodynamic response of a set of modes. In particular, elliptic flow $V_2$ is linearly proportional to initial eccentricity $\mathcal{E}_2$.
In this work, we generalize the framework to study...
Factorization breaking of flow coefficients is actively studied to understand longitudinal dynamics of the quark-gluon plasma produced in high-energy nuclear collisions, yet no hydrodynamic models have successfully described the centrality dependence of the factorization breaking in various collisions systems. In this study, we reproduce the centrality dependence of rapidity decorrelation in...
Anisotropic flow fluctuations can be used to probe the properties and evolution of the system created in heavy-ion collisions. In this talk, we present the first $p_{\rm T}$-differential measurements of the first and second order moments of $v_{\rm 2}$ probability density function (PDF), extracted from a comprehensive set of light-flavor hadrons. In addition, we also present higher order...
It is the aim of the RHIC BES program and the future FAIR and NICA facilities to produce compressed baryonic matter. In such experiments, strong gradients in baryon density are expected, and therefore the diffusion of baryon number could play a major role in the description of the fireball. The constituents of the produced matter carry a multitude of conserved charges, namely the baryon...