Abstract: Events that started with very similar initial conditions should also evolve similarly and produce similar single-particle distributions of hadrons. This is natural consequence of hydrodynamic description of a collision. We present a novel method for data analysis. It compares the histograms of azimuthal hadron distributions from each event and organizes the events in such a way that those with similar histograms end-up placed close to each other. Those are the ones which underwent similar evolution. Such events can more easily be compared to theoretical simulations where all conditions can be controlled. We illustrate the method on data simulated by the AMPT model. Finally, we speculate about other possible applications of the method.
Posters
Posters presented by our students and researchers at conferences.
D meson production in Au+Au collisions at 200 GeV measured by the STAR experiment
ALICE Measurements on ρ Photoproduction in Pb-Pb Ultra-peripheral Collisions
How to select events which evolved similarly?
Performance of the ALICE secondary vertex b-tagging algorithm
 |
Nuclear effects in Drell-Yan production at the LHCAuthor: Michal Křelina (student - EJČF) + J. Nemchik, ... Conference: XXV international conference on ultrarelativistic heavy-ion collisions (Quark Matter 2015); XLV International Symposia on Multiparticle Dynamics (ISMD 2015); Date: 27.9.-3.10. 2015, Kobe, Japan 4.-9.10. 2015, Wildbad Kreuth, Germany Award: Franco Rimondi Association award for the best theoretical poster (at ISMD 2015) Abstract: Using the color dipole formalism we study production of Drell-Yan (DY) pairs in proton-nucleus interactions in the kinematic region corresponding to LHC experiments. Lepton pairs produced in a hard scattering are not accompanied with any final state interaction, either energy loss or absorption... |
 |
Systematic study of real photon and Drell-Yan pair production in p+A (d+A) interactionsAuthor: Michal Křelina (student - EJČF) + J. Nemchik, ... Conference: XXV international conference on ultrarelativistic heavy-ion collisions (Quark Matter 2015); XLV International Symposia on Multiparticle Dynamics (ISMD 2015); Date: 27.9.-3.10. 2015, Kobe, Japan 4.-9.10. 2015, Wildbad Kreuth, Germany Abstract: We investigate nuclear effects in production of Drell-Yan pairs and direct photons in p(d)-A collisions. For the first time, these effects are studied within the color dipole approach using path integral technique based on the Green function formalism which naturally incorporates the color transparency and quantum coherence effects... |
 |
Production of non-photonic electrons in central U+U collisionsAuthor: Katarína Gajdošová (studentka - EJČF) for the STAR collaboration Conference: XXV international conference on ultrarelativistic heavy-ion collisions (Quark Matter 2015); Date: 27.9.-3.10. 2015, Kobe, Japan Abstract: Since year 2000 the properties of Quark-Gluon Plasma (QGP) are being studied in ultrarelativistic heavy-ion collisions at the Relativistic Heavy Ion Collider (RHIC). Heavy quarks are created during early stages of a heavy-ion collision in hard processes before the system reaches thermal equilibrium and the QGP is formed. Their production is not affected by the QGP phase... |
 |
J/ψ production in U+U collisions at the STAR experimentAuthor: Jana Fodorová (student - EJČF) for the STAR collaboration Conference: European Physical Society Conference on High Energy Physics 2015 (EPS-HEP 2015) XXXIV Mazurian Lakes Conference on Physics (MLCP 2015) Date: 22.-29.7. 2015, Vienna, Austria 6.-13.9. 2015, Piasky, Poland Award: Elsevier Best Poster Award (at EPS-HEP 2015) Abstract: Quark-gluon plasma (QGP), a novel state of deconfined nuclear matter, has been studied in highenergy heavy-ion collisions at the Relativistic Heavy Ion Collider (RHIC). Due to the color screening of the quark-antiquark potential in the QGP the production of heavy quarkonia... |
 |
Dominant couplings in quantum networks with controlled interactionsAuthor: Jiří Maryška (student - MF) + J. Novotný, I. Jex Conference: 22nd Central European Workshop on Quantum Optics Date: 6.-10. 7. 2015, Warsaw, Poland Award: Best Poster Prize 2015 Abstract: We investigate the asymptotic dynamics of a finite network of qubits coupled by controlled interactions. The dynamics of the system is given by the RUO model [1]. We consider several cases of controlled interactions, namely two-qubit interactions and three-qubit interactions with one or two control qubits. The topology of the interactions (i.e. the allowed interactions between qubits) is chosen arbitrarily and it is described by... |