Bonn 2020 – wissenschaftliches Programm
Die DPG-Frühjahrstagung in Bonn musste abgesagt werden! Lesen Sie mehr ...
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
T: Fachverband Teilchenphysik
T 88: Top quarks: associated production
T 88.7: Vortrag
Donnerstag, 2. April 2020, 18:00–18:15, L-4.001
Constraining top-quark couplings combining top-quark and B decay observables — Stefan Bißmann, Johannes Erdmann, •Cornelius Grunwald, Gudrun Hiller, and Kevin Kröninger — TU Dortmund, Fakultät Physik, Deutschland
Over the last years the Standard Model Effective Field Theory (SMEFT) gained a lot of popularity in model-independent searches for physics beyond the Standard Model in the top-quark sector. Various efforts are being made to interpret measurements of top-quark production and decay observables in the context of SMEFT, aiming towards a global fit of dimension-six operators affecting the top quark. In this talk, a new approach is presented, combining measurements from top-quark and B physics observables to constrain the Wilson coefficients of dimension-six operators that modify the couplings of the top quark to the gauge bosons. Considering the ttγ cross section together with the B→ Xs γ branching fraction, the ingredients required for a consistent combination of observables from different energy scales are discussed and the benefits of this approach for the resulting constraints on the Wilson coefficients are demonstrated.