The VII-th International Conference on the Initial Stages of High-Energy Nuclear Collisions : Initial Stages 2023

Session

Parallel Session 3

20 Jun 2023, 16:10

Copenhagen

Conveners

Parallel Session 3

• Jean-Yves OLLITRAULT
• Jean-Yves Ollitrault

164. Large-scale model-to-data comparison of ultrarelativistic heavy-ion collisions using TRENTo-3D initial conditions

Derek Soeder (Duke University)

20/06/2023, 16:10

The initial stages and nuclear structure in heavy-ion collisions

Oral

A promising area of development in QCD research is extending beyond the well-studied boost-invariant or (2+1)D picture of QGP evolution and into (3+1)D. Doing so offers a powerful means of further constraining the validity and the parameters of successful collision models and thus allows us to refine our knowledge of the properties of the QGP. However, the extra dimension also introduces...

68. Elliptic flow fluctuations of charged and identified hadrons relative to the participant and spectator planes in heavy-ion collisions with ALICE

Michael Rudolf Ciupek (Heidelberg University (DE))

20/06/2023, 16:30

The initial stages and nuclear structure in heavy-ion collisions

Oral

Measurements of different flow harmonics relative to the participant and spectator planes provide unique insight into the initial conditions and the space-time evolution of the quark-gluon plasma (QGP). Different particle-type dependencies of these flow harmonics allow to separate the effects of QGP evolution and initial state fluctuations. Elliptic flow coefficients ($v_{2}$) relative to the...

60. Charge-dependent correlation and fluctuation measurement at CMS

Subash Chandra Behera (Indian Institute of Technology Madras (IN))

20/06/2023, 16:50

The initial stages and nuclear structure in heavy-ion collisions

Oral

We present the first studies of net-charge fluctuations and charge-balance functions using the broad rapidity coverage of the CMS experiment. These types of event-by-event fluctuations are a powerful tool to characterize the thermodynamic properties of the quark-gluon plasma (QGP). The net-charge of the system, e.g., quantified by the $\nu_{dyn}$ observable, is a conserved quantity, meaning...

79. Attractors in the Adiabatic Hydrodynamization framework: how and where to find them

Rachel Steinhorst (Massachusetts Institute of Technology)

20/06/2023, 17:10

The initial stages and nuclear structure in heavy-ion collisions

Oral

One of the main challenges in the theory of heavy ion collisions is understanding how an initial state of two highly Lorentz-contracted nuclei acquires the features of a hydrodynamic plasma in a characteristic time of 1 fm/c. Arguably, the most successful descriptions of this out-of-equilibrium stage have been established by seeking and finding so-called “attractor” solutions in the various...

9. Condensation and early time dynamics in QCD plasmas

Lillian Margaret-Marie de Bruin (Universität Heidelberg)

20/06/2023, 17:30

The initial stages and nuclear structure in heavy-ion collisions

Oral

High energy nuclear collisions produce far-from-equilibrium matter with a high density of gluons at early times. We identify for the first time two local order parameters for condensation, which can occur as a consequence of the large density of gluons. We demonstrate that an initial over-occupation of gluons can lead to the formation of a macroscopic zero mode towards low momenta that scales...

2. Pre-Equilibrium Evolution of Conserved Charges with ICCING Initial Conditions

Patrick Carzon

20/06/2023, 17:50

The initial stages and nuclear structure in heavy-ion collisions

Oral

Heavy-ion collisions can be well described through relativistic viscous hydrodynamics, but questions still remain when hydrodynamics is applicable because the initial state may begin very far-from-equilibrium.
Thus, a pre-equilibrium evolution phase is used to bridge the gap between the initial state and hydrodynamics. K$\phi$MP$\phi$ST is one such pre-equilibrium model that propagates the...