Abstract:
Since the discovery of the Higgs boson by the ATLAS and CMS experiments almost 10 years ago multiple studies have been performed to establish whether this new particle has the properties predicted by the Standard Model (SM), or instead belongs to a yet unobserved sector beyond the SM. With a growing dataset, the studies of Higgs boson properties are now moving from observations to increasingly precise measurements. I will present a few milestones on this journey. I will focus on the results of two studies of Higgs boson properties using its production in association with two jets ( j j ) and its decay into W W ∗ → eν μν, based on a dataset corresponding to 36.1/fb of √s = 13 TeV proton– proton collisions recorded by the ATLAS experiment at the Large Hadron Collider. The first study targets Higgs boson production via gluon–gluon fusion and constrains the CP properties of the effective Higgs–gluon interaction. The second study exploits the vector-boson fusion production mechanism to probe the Higgs boson couplings to longitudinally and transversely polarised W and Z bosons in both the production and the decay of the Higgs boson; these couplings have not been directly constrained previously.
Important: This seminar is held in building D-11 room 104.
Please, be advised that due to the pandemic sanitary rules, we can absorbe 1 unvaccinated person per 10m^2, which means 4 people. As most of us are vaccinated, this should not be a problem. There will be a list of participants, stating that they were (or were not) vaccinated / are immune / with a valid covid test, where we will ask you to sign in upon arrival. Also, people with ANY symptoms of cold (either of running nose, cough, temperature, ...), not necessarily covid, are not allowed to participate according to the rules. We hope you understand. The situation is dynamic and we will of course keep you posted. At the moment we plan to proceed “live”, similary to teaching at AGH.