Research interests in our research group

Large Hadron Collider (LHC) at CERN provides collisions of proton-proton, proton-lead and lead-lead beams to four very large experimental stations: ALICE, ATLAS, CMS and LHCb. We are participating to the ALICE experiment that is a joined effort of roughly 1800 researchers and engineers from 176 institutes in 41 countries.

ALICE, A Large Ion Collider Experiment, is the dedicated experiment to measure ultra-relativistic heavy ion collisions (URHIC) at the LHC. Although ALICE detectors are designed mainly based on needs of URHIC, we take the data also in proton-proton running and provide results that are complementary to those obtained by general purpose experiments ATLAS and CMS.

The main purpose of URHIC collisions is to study properties of very dense and hot strongly interacting matter. It is generally accepted that matter goes trough a deconfinement phase transition from hadronic matter to quark-gluon plasma (QGP) at temperatures of the order of 150 MeV, that corresponds to 2000 billion K in natural units. The early Universe went trough the QCD phase transition a few microseconds after the Big Bang.

Now that scientific consensus on the existence of the QCD phase transition is reached, today's research is concentrated  on detailed properties of the hot and dense strongly interacting matter. One example is the shear viscosity to entry ratio that in general measures the fluidity of the matter. Recent results show the QGP is the most perfect liquid that so far has been studied in laboratory. The large statistics and precision data from the LHC has opened a possibility to discuss even the temperature dependence of the fluidity of QGP.

In the ALICE experiment, our group has responsibilities both in physics analysis and detector hardware. Please find more detailed description of our current research, recent publications and who we are!

Selected publications

Systematic studies of correlations between different order flow harmonics in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV

ALICE Collaboration

e-Print: arXiv:1709.01127 [nucl-ex]

First measurement of jet mass in Pb–Pb and p–Pb collisions at the LHC

ALICE Collaboration

Phys. Lett. B776 (2018) 249-264

New Fast Interaction Trigger for ALICE

ALICE Collaboration (Wladyslaw Trzaska for the collaboration)

Nucl. Instrum. Meth. A845 (2017) 463-466