Members of the Particle Theory Department conduct research in the domain of theory and phenomenology of elementary particles and high energy scatterings. Current reserach directions focus mainly on the theory of strong interactions (Quantum Chromodynamics), however are not limited to that and may include research in the broader sens of elementary particle theoretical physics.
"Ciężkie bariony i podwójnie ciężkie tetrakwarki w efektywnym modelu chiralnym dla chromodynamiki kwantowej", NCN Opus 14, nr 2017/27/B/ST2/01314
"Nowe teorie hydrodynamiki relatywistycznej dla materii oddziałującej silnie", NCN Opus 12, nr 2016/23/B/ST2/00717
Leszek Motyka, Mariusz Sadzikowski:
"Resumacje chromodynamiki kwantowej w zastosowaniu do precyzyjnego opisu procesów elektrosłabych w LHC", NCN Opus 14, nr 2017/27/B/ST2/02755
J. Wosiek, P. Korcyl:
"Badania kwantowych teorii pola z symetrią cechowania w ich obszarze nieperturbacyjnym", NCN Opus 11, nr 2016/21/B/ST2/01492
"Efekty wysokoenergetycznej chromodynamiki kwantowej w procesach produkcji fotonów, par leptonowych i ciężkich mezonów", NCN Sonatina 3, nr 2019/32/C/ST2/00202
Specific research topics:
L. Motyka, M. Praszalowicz, M. Sadzikowski, T. Stebel
The research activity on different aspects of perturbative Quantum Chromodynamics (QCD) and its applications to collider physics.
QCD is particularly interesting as it is the fundamental theory that describes the structure and interaction of nucleons and atomic nuclei. It is also crucial to understand the evolution of early Universe and the structure of compact stars. Besides, as a strongly self-interacting non-linear quantum field theory, it makes the case of an exceptional theoretical challenge. In more practical terms, an accurate description of strong interactions within QCD is necessary to predict and properly interpret the results of current and future experiments in high energy physics, such as particle colliders, e.g. the Large Hadron Collider (LHC) at CERN and the future Electron Ion Collider (EIC) at the Brookhaven National Laboratory (USA). In such experiments the strong interactions and the features of hadron structure have essential effects on measurements. In particular, the recent great discovery of the Higgs boson at the LHC required a high level of theoretical control in describing the strong interactions.
Within QCD we are particularly interested in these problems that are relatively poorly understood within the standard methodology and require invention of new theoretical methods, and in those ones that lead into a deeper insight into the structural properties of this field theory. From the application side, the purpose of our research is to obtain the possibly most complete and accurate description of phenomena studied in modern experiments in high energy physics, with particular emphasis on increasing the sensitivity of the experiment to signals of new hypothetical fundamental particles and interaction — the New Physics. We also aim at achieving deepest possible understanding of the proton structure.
From the theory side, we use mostly the quantum field theory perturbative approach to QCD scattering amplitudes. From the phenomenology side, we study hard probes of strong interactions and the parton structure of hadrons and nuclei, like the leptons, the photon, heavy electroweak bosons or heavy mesons. We aim at providing the most precise predictions for processes that probe the current limits of the Standard Model and the possible New Physics, like the Higgs boson and the top quark production, as well as for hypothetical production of supersymmetric partners of the Standard Model particles: squarks and gluinos.