Workshop on QGP Phenomenology

26 May 2021, 13:45 → 31 May 2021, 21:30 Europe/Berlin

Farid Taghinavaz (IPM), Masoud Shokri (IPM, School of Particles and Accelerators), Mohammad Asadi, Neda Sadooghi (Sharif University of Technology)

Our goal is to build awareness in graduate students and postdoctoral researchers around the broad research opportunities in heavy-ion physics and quark-matter studies. To achieve this goal, we have invited leading members of the community to deliver talks on trending topics in the field. The workshop also includes a limited number of short talks by graduate students and early-career researchers.

poster-workshop.pdf

Wednesday, 26 May

13:45 → 15:45 First session: Opening

Convener: Johanna Stachel (Ruprecht Karls Universitaet Heidelberg (DE))

13:45 Welcome

Speaker: Mojtaba Mohammadi Najafabadi (Institute for Research in Fundamental Sciences (IR))

14:00 QGP Phenomenology and the big challenge of small systems

Speaker: Urs Wiedemann (CERN)

15:00 The most essential experimental aspects of past and future Heavy-Ion physics experiments

Speaker: Alexander Schmah (Ruprecht Karls Universitaet Heidelberg (DE))

ASchmah_QGP_workshop_final.pdf

15:45 → 16:00 Break

16:00 → 17:15 Second session

Convener: Rob Pisarski (APS)

16:00 Physical characteristics of glasma at very early times

Speaker: Alina Czajka (National Centre for Nuclear Research)

talk-iran-glasma.pdf

16:30 Introduction to the CGC effective theory

Speaker: Renaud Boussarie (CPHT, École polytechnique)

BoussarieQGP2021.pdf

17:15 → 17:30 Break

17:30 → 19:15 Third Session

Convener: Mubarak Alqahtani (Imam Abdulrahman Bin Faisal University)

17:30 Medium evolution of a heavy q\bar{q} pair, the large $N_c$ limit

Speaker: Miguel Ángel Escobedo Espinosa (Instituto Galego de Física de Altas Enerxías)

qgppheno.pdf

18:00 The Out of Equilibrium Search For the QCD Critical Point

Speaker: Travis Dore (University of Illinois at Urbana-Champaign)

DORE_qgpPheno.pdf

18:30 Early time dynamics of the QGP

Speaker: Prof. Soeren Schlichting (Universität Bielefeld)

SchlichtingQGP21.pdf

19:15 → 19:45 Q/A (moderated by Aritra De)

Thursday, 27 May

13:45 → 15:45 First session

Convener: Dirk Rischke (University Frankfurt)

13:45 Dynamical description of relativistic heavy-ion collisions

Speaker: Chun Shen (Wayne State University)

DynamicalModeling.pdf

14:30 The evolution of thermodynamic quantities in a 0+1d expanding magnetized plasma

Speaker: Ali Tabatabaee (IPM, SPA)

The evolution of thermodynamic quantities in a Bjorken expanding magnetized plasma.pdf

15:00 Open quantum systems approach to bottomonium suppression in the QGP

Speaker: Michael Strickland (Kent State University)

strickland.pdf

15:45 → 16:00 Break

16:00 → 17:45 Second session

Convener: Behrad Taghavi (IPM)

16:00 Event-by-event simulations of Pb+Pb collisions with anisotropic hydrodynamics

Speaker: Michael McNelis (Ohio State University)

Mike_VAH.pptx

16:30 Collective behavior in rarely-interacting systems: time-dependent anisotropic flow coefficients

Speaker: Nina Kersting (Bielefeld University)

Slides_Nina.pdf

17:00 Modelling Hydrodynamics

I will describe a recent addition to the family of causal and
stable models of relativistic hydrodynamics. I will also address the wider question of how one can match such effective descriptions to underlying microscopic theories.

Speaker: Michał Spaliński

17:45 → 18:00 Break

18:00 → 19:00 Third Session

Convener: Aritra De

18:00 Heavy quark diffusion from the lattice

Speaker: Viljami Leino (Technical University of Munich (TUM))

QGP2021_VL.pdf

18:30 Constraining early time dynamics in ultrarelativistic Heavy Ion Collisions

It is frequently supposed that quark-gluon plasma created in heavy-ion collisions undergoes free streaming at early times. We examine this issue based on the assumption that a universal attractor dominates the dynamics already at the earliest stages, which offers a way to connect the initial state with the start of the hydrodynamic expansion in an approximate but conceptually transparent fashion. We demonstrate that the centrality dependence of the measured particle multiplicities can be used to quantitatively constrain the pressure anisotropy and find that it strongly depends on the model of the initial energy deposition. As an illustration, we compare three initial state models and show that they predict rather different early-time values of the pressure anisotropy. This strongly suggests that assuming free streaming prior to hydrodynamization is not necessarily compatible with a generic initial state model and that features of the pre-hydrodynamic flow need to be matched with the model of the initial state.

Speaker: Jakub Jankowski (University of Warsaw)

May_2021.pdf

19:00 → 19:30 Q/A

Friday, 28 May

13:45 → 15:45 First session

Convener: Dr Iurii Karpenko (FNSPE CTU in Prague)

13:45 Theoretical developments in statistical quantum field theory and the spin physics in the Quark Gluon Plasma

Speaker: Francesco Becattini (Unversity of Florence)

becattini.pdf

14:30 Λ polarization from the thermalized jet energy and momentum

Speaker: Willian Matioli Serenone (Universidade de Campinas)

Polarization_Jet_Quenching.pdf

15:00 Quantum kinetic theory and the Wigner-function formalism

Speaker: Enrico Speranza (University of Illinois at Urbana-Champaign)

speranza_qgp_worshop.pdf

15:45 → 16:00 Break

16:00 → 17:15 Second session

Convener: Giorgio Torrieri (IFGW, Unicamp)

16:00 Theory of spin hydrodynamics for ultra-relativistic heavy-ion collisions

Speaker: Mr Rajeev Singh (Institute of Nuclear Physics Polish Academy of Sciences)

MS_Talk.pdf

16:30 Quantum energy-density fluctuations

Speaker: Wojciech Florkowski (Jagiellonian University)

WF-teheran.pdf

17:15 → 17:30 Break

17:30 → 18:45 Third Session

Convener: Victor E. Ambrus

17:30 Polarization: Experimental Status and Future Directions

Speaker: Mike Lisa (Ohio State University (US))

LisaPhenomenologyWorkshopMay2021.pdf

18:45 → 19:15 Q/A

Monday, 31 May

13:45 → 15:45 First session

Convener: Karl Landsteiner (Unknown)

13:45 The ever more complex life of hydrodynamics modes

Speaker: Andrei Starinets (Oxford University)

starinets_iran_2021.pdf

14:30 Spin tensor and pseudo-gauges in relativistic nuclear collisions

Speaker: Nora Weickgenannt (Goethe University Frankfurt)

QGP21_Weickgenannt.pdf

15:00 Deterministic Randomness in Hydrodynamics

Speaker: Misha Stephanov (UIC)

qgp-2021-slides.pdf

15:45 → 16:00 Break

16:00 → 17:15 Second session

Convener: Matteo Buzzegoli (INFN)

16:00 General-relativistic viscous fluids

The discovery of the quark-gluon plasma that forms in heavy-ion collision experiments provides a unique opportunity to study the properties of matter under extreme conditions, as the quark-gluon plasma is the hottest, smallest, and densest fluid known to humanity. Studying the quark-gluon plasma also provides a window into the earliest moments of the universe, since microseconds after the Big Bang the universe was filled with matter in the form of the quark-gluon plasma. For more than two decades, the community has intensely studied the quark-gluon plasma with the help of a rich interaction between experiments, theory, phenomenology, and numerical simulations. From these investigations, a coherent picture has emerged, indicating that the quark-gluon plasma behaves essentially like a relativistic liquid with viscosity. More recently, state-of-the-art numerical relativity simulations strongly suggested that viscous and dissipative effects can also have non-negligible effects on gravitational waves produced by binary neutron star mergers. But despite the importance of viscous effects for the study of such systems, a robust and comprehensive theory of relativistic fluids with viscosity is still lacking. This is due, in part, to difficulties to preserve causality upon the inclusion of viscous and dissipative effects into theories of relativistic fluids. In this talk, we will survey the history of the problem and report on a new approach to relativistic viscous fluids that solves decade-long questions in the field, paving the way for the systematic investigation of dissipative phenomena in general relativity.

Speaker: Marcelo Disconzi

IRQM.pdf

16:45 Is hydrodynamic stability enough?

It is well known that relativistic hydrodynamic theories, to be "realistic", should be causal and stable. But stable with respect to what? The standard notion of stability one typically refers to is hydrodynamic stability, namely the requirement that on-shell perturbations away from the state of thermodynamic equilibrium remain bounded over time. I will argue that such a stability criterion is not enough to have a complete picture of the reliability of a theory and that there is a more fundamental stability principle, which relativistic fluid theories should obey.

Speaker: Lorenzo Gavassino

Webminar.pdf

17:15 → 17:30 Break

17:30 → 19:45 Third Session

Convener: Ulrich Heinz (The Ohio State University)

17:30 Strangeness Neutral Equation of State for QCD with a Critical Point

Speaker: Debora Mroczek (University of Illinois at Urbana-Champaign)

Mroczek_QGPPheno2021.pdf

18:00 Criticality on the hydrodynamic expansion

Speaker: Farid Taghinavaz (IPM)

Taghinavaz.pdf

Taghinavaz.pptx

18:30 Hydrodynamics and broken chiral symmetry

Speaker: Derek Teaney (Stony Brook University)

dteaney_qgppheno.pdf

19:15 Theoretical aspects of Lambda polarization measurement

Speaker: Dr Radoslaw Ryblewski (Institute of Nuclear Physics PAN)

WQP_2021_Ryblewski.pdf

19:45 → 20:15 Finalizing the workshop