IFIC seminar: Top Secret(s): Probing the Standard Model with rare processes involving top quarks

por Dr. Josh McFayden (University of Sussex)

martes 26 nov. 2024 12:00 → 14:00 Europe/Madrid

1001-Primera-1-1-1 - Paterna. Seminario (Universe)

The top quark’s large mass, significantly heavier than other fundamental particles, means it could play a special role in electroweak symmetry breaking, including offering a window on questions about the quantum stability and matter-antimatter asymmetry of the Universe. Processes involving top quarks can be especially sensitive to new beyond the Standard Model (SM) physics through effective interactions of the top with other particles. LHC Run 2 data has allowed unprecedented precision of rare and high-mass processes involving top quarks, in particular top quarks produced in association with other particles (Top+X). Analysis of Run 2 data has lead to the observation of the tZq, ttH and 4-tops processes, evidence for tWZ and the first differential measurements of ttW, ttZ and ttH production. This rich harvest of results is providing a robust test of the SM and uncovering some deviations from it. This highly motivates coordinated efforts to search for new physics in these Top+X final states. A convenient framework to do this through interpretations using the Effective Field Theory (EFT) formalism. I will present an overview of these results and some thoughts for future directions of research in this area.

2024-11-26_ValenciaSeminar_ttX_mcfayden.pdf