Charge Parity violation is one of Sakharov's conditions, necessary to explain the asymmetry between matter and antimatter in the Universe. The Standard Model (SM) of particle physics, being the most successful theory of particle physics to date, does not provide sufficient sources of CP violation to explain the excess of matter measured. This is one of the arguments suggesting that the SM is...
Vector Boson Scattering (VBS) is a rare and complex process that occurs during high-energy proton-proton collisions at the Large Hadron Collider (LHC), observed with the ATLAS detector. Polarization, an intrinsic property related to the spin of the particles, can be observed by analyzing the characteristic of the decay products of the Vector Bosons. This plays a crucial role in better...
In an era of growing armed conflicts and the threat of terrorist attacks, the search for effective methods for detecting and neutralizing hazardous materials is becoming particularly important. They are important not only in the context of protecting the population but also the natural environment. The seminar will discuss methods for detecting explosives and other hazardous substances using...
The High-Acceptance Di-Electron Spectrometer (HADES) operates at the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt, using pion, proton, and heavy-ion beams provided by the SIS-18 synchrotron. In February 2022, the HADES Collaboration measured proton-proton collisions at 4.5 GeV momentum using the upgraded setup as part of the FAIR-Phase0 program.
One of the key objectives of...
We discuss theoretical basis for measurement of magnetic and electric dipole moments (MDM and EDM) of short-lived particles at the LHC by using bent crystals. In particular, measurement of these dipole moments for the charmed baryons Lambda_c and Xi_c would allow one to directly obtain information on MDM and EDM of the charm quark. This can be demonstrated in a constituent quark model. The...
The μPPET [mu(μ)on Probe with j-PET] project aims to investigate the "muon puzzle" from cosmic rays air showers. This puzzle is related to observing a much larger number of muons on the earth's surface than it results from current theoretical models. The investigated hypothesis relies on an observed effect in muon cross-section and trajectory due to projectile-target polarizations. The...
The Jagiellonian Positron Emission Tomograph (J-PET), a flagship project of the University, is the first PET scanner made of plastic scintillators. It goes beyond the standard PET imaging and enables novel investigations in both fundamental physics and medical imaging. J-PET research is currently focused on the study of positronium (Ps) decays. Positronium, a hydrogen-like bound state...
While naively laser only excites target, it can also cause its deexcitation – as stimulated emission, ASE (amplified spontaneous emission), SASE (self-amplified spontaneous emission), synchrotron self-absorption, or in Rabi cycle cyclically causing excitation and deexcitation. STED microscopy is a popular application of laser causing deexcitation - I would like to propose and discuss a few...
Electromagnetic bound states emit photons, with a well-known example being the 2P → 1S transition of the hydrogen atom, which leads to the ground state and a single photon. But to what extent can this decay be accurately described by an exponential decay law? Next, we examine the decay of parapositronium into two photons using a theoretical approach inspired by nuclear physics: the...
