Conveners
:: Jets 2
- Shanshan Cao (Shandong University, China)
:: Jets 4
- Andrey Sadofyev (Instituto Galego de Fisica de Altas Enerxias, Spain)
:: Heavy quarks 1
- Bithika Karmakar (Institute of Physics Belgrade, Serbia)
Hard probes are produced at early stages of heavy ion collisions and carry with them information about the medium they traverse before being detected. Some of them are elementary, but some, like quarkonia are complex. In this talk I shall argue that it is interesting to consider such complex hard probes from the point of view of open quantum systems. I shall in particular establish interesting...
Over the last decades, the theoretical picture of how hadronic jets interact with nuclear matter has been extended to account for the medium’s finite longitudinal length and expansion. However, only recently a first-principle approach has been developed that allows to couple the jet evolution to the medium flow and anisotropic structure in the dilute limit. In this talk, I will show how to...
Historically, high-pT radiative energy loss is calculated under the assumptions of the optically thin or optically thick medium within pQCD. These are two limiting (and opposite) approximations, corresponding to a jet experiencing only one or an infinite number of scatterings with medium constituents, respectively. However, in general, QGP created at the RHIC and the LHC is estimated to have...
EPOS4 is a (recently released) multipurpose event generator for simulating high energy proton-proton and nucleus-nucleus collisions, which allows to treat within the same formalism very high pt processes and also low-pt phenomena. We will first present the basic ideas, and then discuss applications concerning high-pt particle production as well as collective effects in high-multiplicity pp...
In high-energy proton-nucleus (pA) collisions, an incoming energetic parton crosses the target nucleus and suffers medium-induced, fully coherent gluon radiation. I will review the theoretical status of this effect, and present the phenomenological consequences of the corresponding fully coherent energy loss (FCEL) on light hadron, heavy meson and quarkonium production in pA collisions. I will...
In this work we use linearized QCD kinetic to study how highly energetic parton -proxy for a jet- interacts with the hot Quark-Gluon Plasma (QGP), We find that the parton loses energy to the medium mainly through a radiative turbulent gluon cascade, down to the temperature, at which dissipation starts taking place. The distribution of energy takes place in two stages, first, a highly...
Hybrid Hadronization is based on the idea of describing hadronization at short and long distances by different hadronization models, namely parton recombination, and string fragmentation. The latter dominates in the vacuum at large energies. The former becomes important at lower energies and in the presence of a bath of partons, e.g. for jet showers or heavy quarks in quark gluon plasma....
The production of heavy-flavour hadrons in hadronic collisions can be calculated with a factorisation approach, as a product of parton distribution functions (PDFs), partonic hard- scattering cross section, and parton-to-hadron fragmentation functions, assumed to be universal among different collision systems. Recent measurements of baryon-to-meson production yield ratios at the LHC, observed to...
In ultra-relativistic heavy-ion collisions, a dense and hot QCD medium, the Quark-Gluon Plasma (QGP) is created. Heavy quarks (charm and beauty) are produced dominantly in hard partonic scatterings in the early stage of the collisions and experience the whole medium evolution. Measurements of open heavy-flavor hadron production provide information on the transport properties of the QGP, the...
Multiparton interactions in proton-proton collisions have long been a topic of great interest. A new look at them has begun to emerge from work being done to understand the dynamics of ‘small systems’, a topic that is taking center stage in the physics of relativistic heavy-ion interactions. Numerous studies conducted at the LHC and lower energies reveal that proton-proton collisions at high...
