Strong and Electro-Weak Matter 2026

Session

Heavy Ion Contributions 3

17 Aug 2026, 16:30

F4050 (4th floor) (University of Helsinki Main Building)

110. Looking at Protons through a QGP Lens

Krishna Rajagopal (Massachusetts Inst. of Technology (US))

17/08/2026, 16:30

Heavy-ion collisions and the quark gluon plasma

talk (30min)

Quarks and gluons within a proton are confined within a volume in which the energy density and pressure are comparable to those of quark-gluon plasma (QGP) at or just above the QCD transition temperature. With this as motivation, I will investigate the interplay between the thermodynamic (Gibbs) entropy of QGP and the entanglement entropy of confined hadronic states across the quark-hadron...

22. Transport coefficients for Lindbladian quarkonium evolution in a quark–gluon plasma

Panayiotis Panayiotou (Technical University of Munich)

17/08/2026, 17:00

Heavy-ion collisions and the quark gluon plasma

talk (15min)

I will outline a systematic description of medium induced modifications to quarkonium in a quark gluon plasma by making use of the Open Quantum Systems framework and effective field theories such as pNRQCD. These medium effects are encoded in a finite set of transport coefficients defined through real-time thermal chromoelectric correlators, which can be associated with analytically continued...

60. Efficiently simulating quarkonium's evolution beyond the dipole approximation

Miguel Angel Escobedo Espinosa (Universitat de Barcelona)

17/08/2026, 17:15

Heavy-ion collisions and the quark gluon plasma

talk (15min)

The open quantum system framework allows one to compute quarkonium's evolution in a medium, keeping track of the needed quantum features. However, computing this evolution is a computationally demanding task. QTRAJ is an efficient code that allows one to simulate the behavior of quarkonium in a medium in the case in which the medium sees quarkonium as a small color dipole $rT\ll 1$. While this...

61. Open quantum system approach to the transverse momentum broadening of a colour dipole

Pietro Benzoni (Subatech)

17/08/2026, 17:30

Heavy-ion collisions and the quark gluon plasma

talk (15min)

Colour decoherence in jet quenching has been the subject of intense theoretical activity and is actively searched for at RHIC and the LHC. However, it has so far lacked a systematic foundation from the perspective of open quantum systems, where the notion of decoherence is naturally formulated. In this talk (based on [1]), the open quantum systems framework is used to investigate the real-time...

30. Vector-meson spin alignment from local equilibrium and freeze-out geometry

Zhong-Hua Zhang (Fudan University)

17/08/2026, 17:45

Heavy-ion collisions and the quark gluon plasma

talk (15min)

Spin polarization has become a sensitive probe of vorticity and shear structures in the quark-gluon plasma. While global hyperon polarization can be largely understood from spin-vorticity coupling, the tensor polarization, or spin alignment, of vector mesons remains a challenging observable whose magnitude and sign depend strongly on collision energy, momentum, and meson species.

In this...