BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:A New Model for Jet Energy Loss in Heavy Ion Collisions DTSTART;VALUE=DATE-TIME:20230530T080500Z DTEND;VALUE=DATE-TIME:20230530T083000Z DTSTAMP;VALUE=DATE-TIME:20261009T213330Z UID:indico-contribution-167-376@indico.ipb.ac.rs DESCRIPTION:Speakers: Iurii Karpenko (Czech Technical University in Prague )\nWe present a new model for jet quenching from coherent radiation in a b rick medium. The jet energy loss is simulated as a perturbative final-stat e vacuum parton shower followed by a medium-induced shower originating fro m elastic and radiative collisions with the medium constituents. Coherency is achieved by starting with trial gluons that acts as field dressing of the initial jet parton. These are formed according to a Gunion-Bertsch see d. The QCD version of the LPM effect is attained by increasing the phase o f the trial gluons through elastic scatterings with the medium. Above a ph ase threshold\, the trial gluon will be realised and can produce coherent radiation themselves.\nThe model has been implemented in a Monte Carlo cod e and has been validated by successfully reproducing the BDMPS-Z predictio n for the energy spectrum. The realistic case with minimal assumptions are also produced and shown.\n\nhttps://events.saifa.rs/event/554/contributio ns/376/ LOCATION:SANU (Serbian Academy of Science and Arts) - Belgrade\, Serbia URL:https://events.saifa.rs/event/554/contributions/376/ END:VEVENT BEGIN:VEVENT SUMMARY:Exploring jet transport coefficients by elastic and radiative scat terings in the sQGP DTSTART;VALUE=DATE-TIME:20230530T072500Z DTEND;VALUE=DATE-TIME:20230530T074500Z DTSTAMP;VALUE=DATE-TIME:20261009T213330Z UID:indico-contribution-167-374@indico.ipb.ac.rs DESCRIPTION:Speakers: Ilia Grishmanovskii (ITP\, Frankfurt)\nWe study the interaction of leading jet partons in a strongly interacting quark-gluon p lasma (sQGP) medium based on the effective dynamical quasi-particle model (DQPM). The DQPM describes the non-perturbative nature of the sQGP at fini te temperature T and baryon chemical potential μB based on a propagator r epresentation of massive off-shell partons (quarks and gluons) whose prope rties (characterized by spectral functions with T\,μB dependent masses an d widths) are adjusted to reproduce the lQCD EoS for the QGP in thermodyna mic equilibrium. We present the results for the jet transport coefficients \, i.e. the transverse momentum transfer squared per unit length q̂ and t he energy loss per unit length ΔE=dE/dx in the QGP and investigate their dependence on the temperature T and baryon chemical potential μB as well as on jet properties such as the leading jet parton momentum\, mass\, flav or\, and the choice of the strong coupling constant. In this work both ela stic and radiative scattering processes of leading jet parton with the sQG P partons are considered. We compute the cross sections and transport coef ficients and compare the contributions from elastic partonic scattering an d radiative processes for the emission of massive gluons. We present a com parison of our results for the elastic energy loss in the sQGP medium with pQCD results as well as with lattice QCD and also with estimates for q̂ by the JET and JETSCAPE Collaborations based on a comparison of hydrodynam ical calculations with experimental heavy-ion data.\n\nhttps://events.saif a.rs/event/554/contributions/374/ LOCATION:SANU (Serbian Academy of Science and Arts) - Belgrade\, Serbia URL:https://events.saifa.rs/event/554/contributions/374/ END:VEVENT BEGIN:VEVENT SUMMARY:Measuring open/hidden charm at SPS energy in the NA60+ experiment DTSTART;VALUE=DATE-TIME:20230531T082000Z DTEND;VALUE=DATE-TIME:20230531T084000Z DTSTAMP;VALUE=DATE-TIME:20261009T213330Z UID:indico-contribution-167-392@indico.ipb.ac.rs DESCRIPTION:Speakers: Enrico Scomparin (INFN Sezione di Torino - Istituto Nazionale di Fisica Nucleare\, Italy)\nHeavy quark production represents one of the main tools for the QGP characterization\, as shown by the vast amount of results obtained in nuclear collisions at collider energies. At fixed-target energies\, these measurements become more difficult because o f the vanishing production cross sections\, and for the moment only charmo nium results at top SPS energy (sqrt(s_NN)=17 GeV) are available. A new ex periment at the CERN SPS is being proposed\, to carry out measurements dow n to sqrt(s_NN)~6 GeV. In this talk I will review the physics topics that can be addressed in this energy domain and show the results of the corresp onding physics performance studies. The status of advance of the experimen t preparation will also be briefly described.\n\nhttps://events.saifa.rs/e vent/554/contributions/392/ LOCATION:SANU (Serbian Academy of Science and Arts) - Belgrade\, Serbia URL:https://events.saifa.rs/event/554/contributions/392/ END:VEVENT BEGIN:VEVENT SUMMARY:Nuclear shape imaging in high-energy nuclear collisions DTSTART;VALUE=DATE-TIME:20230531T075500Z DTEND;VALUE=DATE-TIME:20230531T082000Z DTSTAMP;VALUE=DATE-TIME:20261009T213330Z UID:indico-contribution-167-391@indico.ipb.ac.rs DESCRIPTION:Speakers: Jiangyong Jia (Stony Brook University\, US)\nHydrod ynamic simulations of the quark-gluon plasma (QGP) permit us not only to g auge the transport properties of hot QCD matter from data\, but also to co nstrain the conditions that set the stage for the formation of such matter . Recent measurements from RHIC and LHC demonstrate that the QGP initial c ondition is impacted by the shape and radial structure of the colliding nu clei. Based on a recent community white paper (arXiv:2209.11042)\, we disc uss physics opportunities for nuclear structure and QGP studies offered by high-energy nuclear collisions\, with an emphasis on isobar collisions to clean access to the structural properties of the colliding ions. Recent u pdates from the INT program 23-1a dedicated to this topic will also be cov ered.\n\nhttps://events.saifa.rs/event/554/contributions/391/ LOCATION:SANU (Serbian Academy of Science and Arts) - Belgrade\, Serbia URL:https://events.saifa.rs/event/554/contributions/391/ END:VEVENT BEGIN:VEVENT SUMMARY:ALICE upgrades DTSTART;VALUE=DATE-TIME:20230531T073000Z DTEND;VALUE=DATE-TIME:20230531T075500Z DTSTAMP;VALUE=DATE-TIME:20261009T213330Z UID:indico-contribution-167-390@indico.ipb.ac.rs DESCRIPTION:Speakers: Giuseppe Bruno (Dipartimento di fisica - Politecnic o di Bari and INFN Bari\, Italy)\nThe ALICE collaboration pursues several upgrades to further extend the reach of heavy-ion physics at the LHC. For LHC Run 4 (2029-2032)\, ALICE is pioneering the use of bent\, wafer-scale pixel sensors to produce truly cylindrical tracking layers with very low m aterial budget to replace the three innermost layers of the inner tracking system. The resulting improvement in pointing resolution will allow new m easurements of heavy-flavour hadrons and dielectrons. In addition\, a Forw ard Calorimeter (FoCal) system combines a high-granularity electromagnetic silicon-tungsten calorimeter with excellent two-shower separation for neu tral pion reconstruction with a conventional hadronic calorimeter for phot on isolation. Direct photon measurements with FoCal will provide unique co nstraints on the low-x gluon structure of protons and nuclei via forward m easurements of direct photons.\nFurthermore “ALICE 3” is proposed as t he next-generation experiment for LHC Run5 and beyond to address unresolve d questions about the quark-gluon plasma by precise measurements of heavy- flavour probes as well as electromagnetic radiation in heavy-ion collision s. In order to achieve the best possible pointing resolution a concept for the installation of a high-resolution vertex tracker in the beampipe is b eing developed. It is surrounded by a silicon-pixel tracker covering rough ly 8 units of pseudorapidity. To achieve the required particle identificat ion performance\, a combination of a time-of-flight system and a Ring-Imag ing Cherenkov detector is foreseen. Further detectors\, such as an electro magnetic calorimeter\, a muon identifier\, and a dedicated forward detecto r for ultra-soft photons\, are being studied. \nIn this presentation\, I w ill outline the detector concept as guided by the desired physics reach.\n \nhttps://events.saifa.rs/event/554/contributions/390/ LOCATION:SANU (Serbian Academy of Science and Arts) - Belgrade\, Serbia URL:https://events.saifa.rs/event/554/contributions/390/ END:VEVENT BEGIN:VEVENT SUMMARY:Exploring the sQGP with sPHENIX DTSTART;VALUE=DATE-TIME:20230531T070000Z DTEND;VALUE=DATE-TIME:20230531T073000Z DTSTAMP;VALUE=DATE-TIME:20261009T213330Z UID:indico-contribution-167-389@indico.ipb.ac.rs DESCRIPTION:Speakers: William A. Zajc (Columbia University\, US)\nThe stro ngly-coupled nature of the quark-gluon plasma was discovered nearly twenty years ago. Since that time\, we have learned a great deal about the sQGP and its transport properties\, but the question of how quarks and gluons\, the microscopic degrees of freedom\, produce the near-perfect liquid pro perties observed in the bulk remains open. The sPHENIX experiment\, the fi rst collider detector to be built in the U.S. in over two decades\, is des igned to investigate the sQGP with jets and heavy flavor probes to reveal these essential aspects of thermal QCD matter. I will present both the int ended sPHENIX program\, and the experiment's current status\, with first beam expected at essentially the time of this workshop.\n\nhttps://events. saifa.rs/event/554/contributions/389/ LOCATION:SANU (Serbian Academy of Science and Arts) - Belgrade\, Serbia URL:https://events.saifa.rs/event/554/contributions/389/ END:VEVENT BEGIN:VEVENT SUMMARY:Constraining η/s through high-pt tomography DTSTART;VALUE=DATE-TIME:20230530T074500Z DTEND;VALUE=DATE-TIME:20230530T080500Z DTSTAMP;VALUE=DATE-TIME:20261009T213330Z UID:indico-contribution-167-375@indico.ipb.ac.rs DESCRIPTION:Speakers: Bithika Karmakar (Institute of Physics Belgrade)\nTy pically\, the bulk properties of Quark Gluon Plasma (QGP) are studied usin g the low-pt data. However\, the high-pt probes can also serve as powerful tomography tools\, since they are sensitive to global QGP features\, such as different temperature profiles or initial conditions. In this study\, we try to determine if it is possible to constrain the η/s of the medium formed in the heavy-ion collisions using the high-pt data/theory. We assum e three different parametrizations of (η/s)(T) and compute the high-pt RA A and flow coefficients v2\, v3\, and v4. Our results demonstrate that the high-pt data can not distinguish between different (η/s)(T) assumptions when the evolution is constrained to reproduce the low-pt data. As a secon d approach\, we utilize our dynamical energy loss model to compute the que nching strength (q̂/T^3) and then transform it into the (η/s)(T) of the evolving medium. The temperature dependence of (η/s) computed in this app roach agrees surprisingly well with the (η/s)(T) inferred through state-o f-the-art Bayesian analysis of the low-pt data.\n\nhttps://events.saifa.rs /event/554/contributions/375/ LOCATION:SANU (Serbian Academy of Science and Arts) - Belgrade\, Serbia URL:https://events.saifa.rs/event/554/contributions/375/ END:VEVENT BEGIN:VEVENT SUMMARY:Transport coefficients in the pre-equilibrium stage DTSTART;VALUE=DATE-TIME:20230530T070000Z DTEND;VALUE=DATE-TIME:20230530T072500Z DTSTAMP;VALUE=DATE-TIME:20261009T213330Z UID:indico-contribution-167-373@indico.ipb.ac.rs DESCRIPTION:Speakers: Tuomas Lappi (University of Jyväskylä)\nThe initia l pre-equilibrium stage of a heavy ion collision can have a significant im pact on hard probes of the quark gluon plasma such as jets and heavy quark s. In weak coupling QCD the properties of this pre-equilibrium phase can b e understood by effective kinetic theory\, which can follow the developmen t of the system from the glasma to hydrodynamics. We compute the jet quen ching parameter q̂ and the heavy quark momentum diffusion coefficient usi ng the effective kinetic theory this bottom-up isotropization phase. To a first approximation these coefficients are similar to a thermal system wit h the same energy density. However\, unlike the thermal case these coeffic ients are also anisotropic. They are also enhanced in the earliest overocc upied phase and suppressed in the later\, underoccupied\, stage of thermal ization.\n\n[1] Heavy quark diffusion coefficient in heavy-ion collisions via kinetic theory\, K. Boguslavski\, A. Kurkela\, T. Lappi\, F. Lindenbau er\, J. Peuron\, arXiv:2303.12520 [hep-ph]\n[2] Jet momentum broadening du ring initial stages in heavy-ion collisions\, K. Boguslavski\, A. Kurkela\ , T. Lappi\, F. Lindenbauer\, J. Peuron\, arXiv:2303.12595 [hep-ph]\n\nhtt ps://events.saifa.rs/event/554/contributions/373/ LOCATION:SANU (Serbian Academy of Science and Arts) - Belgrade\, Serbia URL:https://events.saifa.rs/event/554/contributions/373/ END:VEVENT BEGIN:VEVENT SUMMARY:Determining the onset of color coherence with energy correlators DTSTART;VALUE=DATE-TIME:20230529T080500Z DTEND;VALUE=DATE-TIME:20230529T083000Z DTSTAMP;VALUE=DATE-TIME:20261009T213330Z UID:indico-contribution-167-360@indico.ipb.ac.rs DESCRIPTION:Speakers: Carlota Andres (CPHT\, École polytechnique)\nWe pre sent a new approach to jet substructure in heavy-ion collisions based on t he study of correlation functions of energy flow operators (energy correla tors). This approach is based on the insight that the dynamics of the QGP is imprinted at specific time scales in the jet\, which will be reflected as changes in the shape of the correlator. We analyze the two-point correl ator of an in-medium massless quark jet within three jet quenching formali sms: BDMPS-Z with the harmonic oscillator approximation\, BDMPS-Z with a Y ukawa (Gyulassy-Wang) parton-interaction model\, and the first opacity DGL V framework. We show that the spectra of correlation functions is sensitiv e to color coherence\, which allows us to robustly identify the resolution scale of the QGP: the energy scale at which in-medium emissions start to be resolved by the QGP.\n\nhttps://events.saifa.rs/event/554/contributions /360/ LOCATION:SANU (Serbian Academy of Science and Arts) - Belgrade\, Serbia URL:https://events.saifa.rs/event/554/contributions/360/ END:VEVENT BEGIN:VEVENT SUMMARY:What we can learn about the QGP dynamics from jets DTSTART;VALUE=DATE-TIME:20230529T074000Z DTEND;VALUE=DATE-TIME:20230529T080500Z DTSTAMP;VALUE=DATE-TIME:20261009T213330Z UID:indico-contribution-167-359@indico.ipb.ac.rs DESCRIPTION:Speakers: Yacine Mehtar-Tani (Brookhaven National Laboratory\, US)\nQCD jets play a central role in probing QCD at high precision and in new physics searches at colliders. They are also extensively studied in u ltra relativistic heavy ion collisions as multi-dimensional probes of the quark gluon plasma (QGP) that is created in the aftermath of the collision s. While the theory for jet evolution in vacuum is well established\, in t he presence of a hot and dense QCD medium new emergent phenomena take plac e as a result of jet-medium interactions that have been recently uncovered and are currently being studied. In this talk\, I will focus on the emble matic observable of jet quenching that is the nuclear modification factor and show that by exploring its dependence on jet pT\, collision centrality and jet cone size we can extract valuable information about the dynamics and mechanisms of jet energy loss. I will in particular present a recent t heoretical calculation that accounts for quantum interferences effects on energy loss that parton shower undergo in the QGP. I will also show predic tions that were recently compared to ATLAS and ALICE data.\n\nhttps://even ts.saifa.rs/event/554/contributions/359/ LOCATION:SANU (Serbian Academy of Science and Arts) - Belgrade\, Serbia URL:https://events.saifa.rs/event/554/contributions/359/ END:VEVENT BEGIN:VEVENT SUMMARY:Everything You Always Wanted to Know About Jets*... and More DTSTART;VALUE=DATE-TIME:20230529T071000Z DTEND;VALUE=DATE-TIME:20230529T074000Z DTSTAMP;VALUE=DATE-TIME:20261009T213330Z UID:indico-contribution-167-358@indico.ipb.ac.rs DESCRIPTION:Speakers: John Harris (Yale University\, US)\nThe energy loss of fast partons (quarks or gluons) in relativistic heavy-ion collisions ca n provide information on parton energy-loss mechanisms in a quark-gluon pl asma (QGP) and serve to probe its microscopic structure. Understanding the parton energy-loss processes as partons propagate through a QGP requires measurement of large transverse momentum (high-pT) hadrons and jets. Suppr ession of the yield of high-pT hadrons at RHIC was the first indication of parton energy loss. More recently with the advent of higher collision ene rgies at the LHC\, the quenching of jets has been studied extensively in h eavy-ion collisions. In this presentation I will provide an overview of hi gh-pT hadron suppression\, jet quenching and jet substructure measurements in heavy-ion collisions at RHIC and LHC.\n* but were afraid to ask!\n\nht tps://events.saifa.rs/event/554/contributions/358/ LOCATION:SANU (Serbian Academy of Science and Arts) - Belgrade\, Serbia URL:https://events.saifa.rs/event/554/contributions/358/ END:VEVENT BEGIN:VEVENT SUMMARY:Welcome DTSTART;VALUE=DATE-TIME:20230529T070000Z DTEND;VALUE=DATE-TIME:20230529T071000Z DTSTAMP;VALUE=DATE-TIME:20261009T213330Z UID:indico-contribution-167-361@indico.ipb.ac.rs DESCRIPTION:https://events.saifa.rs/event/554/contributions/361/ LOCATION:SANU (Serbian Academy of Science and Arts) - Belgrade\, Serbia URL:https://events.saifa.rs/event/554/contributions/361/ END:VEVENT END:VCALENDAR