Searches for the production of Higgs boson pairs (HH) are of great interest especially for measuring the Higgs boson self-coupling, which is related to the shape of the Higgs potential. While the Standard Model (SM) predicts a very small event rate for this process, modifications of the Higgs boson self-coupling or new couplings introduced in effective field theories (EFTs) can lead to...
Many searches for supersymmetric (SUSY) particles have been conducted by the ATLAS experiment using simplified models, but so far, no evidence of physics beyond the Standard Model has been found. In the absence of new physics, exclusion limits on SUSY particle masses are typically derived from the searches. However, these simplified models do not fully cover the whole SUSY parameter space. In...
Heavy-ion collisions in large-scale particle accelerators, like the LHC, are frequently used to study the theory of Quantum-Chromodynamics (QCD). These collisions result in the creation of a fireball with a very high energy density and pressure, leading to a state of matter known as the Quark-Gluon Plasma (QGP). The extreme conditions achieved in heavy-ion collisions provide a fascinating...
