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Jens Robert Luhder (Westfaelische Wilhelms-Universitaet Muenster (DE))06/04/2022, 18:30QGP in small and medium systemsPoster
Measurements of neutral mesons in small collision systems can serve as a baseline to understand modifications in heavy-ion collisions, where a QGP is formed.
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These measurements can also be used to test pQCD predictions and to constrain fragmentation functions as well as parton distribution functions.
Furthermore, a good understanding of particle production enables the measurement of direct... -
Jasper Parkkila (University of Jyvaskyla (FI))06/04/2022, 18:34QGP in small and medium systemsPoster
Increasingly many studies have involved the use of Bayesian statistics in estimating the transport properties of quark-gluon plasma through hydrodynamic calculations. So far, most of these studies have obtained their estimates in Pb-Pb collision systems at varying center-of -mass energies. It has been since learned that the inclusion of multiple collision configurations and high harmonic...
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Dr Isobel Kolbe (Institute for Nuclear Theory)06/04/2022, 18:38QGP in small and medium systemsPoster
Despite almost a decade of work, the absence of jet-modification in small systems is yet to be satisfactorily explained. Although JEWEL (Jet Evolution With Energy Loss) is a Monte Carlo (MC) generator designed to study the evolution of jets with a variety of background media, the publicly available versions are not able to simulate small systems. We present the first results using an...
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Gyula Bencedi (Wigner Research Centre for Physics (Wigner RCP) (HU))06/04/2022, 18:42QGP in small and medium systemsPoster
Recently, the so-called relative transverse activity classifier, $R_T$, has been proposed as a tool to disentangle the particle production originated from the soft and hard QCD processes in proton-proton (pp) collisions. $R_T$ is a useful quantity to study particle production in events with exceptionally large or small activity in the transverse region with respect to the event-averaged...
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Edwin Duckworth06/04/2022, 18:46QGP in small and medium systemsPoster
Directed flow of particles is an important feature seen in heavy-ion collisions and is a sensitive probe of the equation of state (EoS) of the matter produced in the collisions. Model calculations have also predicted that directed flow could be a sensitive probe of the softening of EOS associated with a first order phase transition. Directed flow of protons and anti-protons are of particular...
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Lukasz Rozplochowski (Institute of Nuclear Physics Polish Academy of Sciences)06/04/2022, 18:50QGP in small and medium systemsPoster
The aim of this work was to investigate the properties of a new, simple model of the nucleus+nucleus collisions at high energy, and its applicability to the CERN SPS energy regime. The model was uniquely based on the system's geometry and local energy and momentum conservation in the quark gluon plasma produced in the reaction.
We studied Pb+Pb collisions at $\sqrt{s_{NN}}$ = 17.3 GeV and...
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Patrycja Anna Potepa (AGH University of Science and Technology (PL))06/04/2022, 18:54Electroweak probesPoster
Electrons constitute an essential component of final states from the leptonic decay channels of W and Z bosons. Their reconstruction and identification are especially challenging in heavy-ion collisions due to high detector occupancy. Therefore, the evaluation of electron performance is crucial for precision measurements of properties of quark-gluon plasma produced in heavy-ion collisions at...
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Oleksandr Tomalak06/04/2022, 18:58Electroweak probesPoster
Effective field theories of QCD, such as soft collinear effective theory with Glauber gluons, have led to important advances in understanding of many-body nuclear effects. We provide first applications to QED processes. We study the exchange of photons between charged particles and the nuclear medium for (anti)neutrino-, electron-, and muon-induced reactions
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inside a large nucleus. We provide... -
Maurice Louis Coquet (Université Paris-Saclay (FR))06/04/2022, 19:02Electroweak probesPoster
We compute the spectrum of dileptons produced by the quark-gluon plasma in the intermediate mass range 1<M<5 GeV using state-of-the-art QCD kinetic theory. Our calculation takes into account the anisotropy of the quark and gluon momentum distributions at early times, as well as the underpopulation of quarks relative to gluons. The resulting dilepton spectrum satisfies approximate transverse...
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Axel Drees06/04/2022, 19:06Electroweak probesPoster
We demonstrate that the $p_T$ dependence of the $\eta/\pi^0$ ratio at mid rapidity is universal within a few percent for high energy $p$+$p$, $p$+A and $d$+A collisions, over a broad range of collision energies. The $\eta/\pi^0$ ratio increases with $p_T$ up to 4 to 5 GeV/$c$ where it saturates at a nearly constant value of 0.487$\pm$0.024. Above $p_T = 5$ GeV/$c$ the same constant value is...
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Maximilian Wiest06/04/2022, 19:10Electroweak probesPoster
Dileptons provide a unique way to access the properties of the fireball created in heavy-ion collisions. Since the dilepton yield directly depends on the duration of the fireball evolution, dileptons are valuable probes of the phase structure of strongly interacting matter. We study dilepton production in the SIS18 energy range by calculating and comparing the thermal dilepton emission for...
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Stefan Floerchinger (Heidelberg University)06/04/2022, 19:14Electroweak probesPoster
Fluid dynamic considerations are used to determine the electric current spectral density in the regime of small energies and momenta. The spectral density in this regime is parameterized by the electric conductivity, the charge susceptibility, and the relaxation time for the electric current, which is needed for relativistic causality. Experimentally, the spectral function can be accessed...
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Niklas Schild06/04/2022, 19:18Electroweak probesPoster
Electromagnetic probes offer a unique opportunity to study the conditions in heavy-ion collisions throughout their whole evolution. In particular, the spectral shapes of dilepton distributions entail information about the temperature of the hot and dense fireball, while the integrated dilepton yield is connected to its lifetime.
In this poster, measurements of dilepton observables are...
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Pingal Dasgupta06/04/2022, 19:22Electroweak probesPoster
The anisotropic flow of direct photons produced in relativistic heavy ion collisions is known to be dominated by the thermal radiations. The non-thermal contributions dilute the photon anisotropic flow by adding extra weight factor in the $v_n$ calculation. The discrepancy between experimental photon anisotropic flow data and results from theoretical model calculations is not well understood...
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