Trócsányi Zoltán (ELTE): A SZEMINÁRIUM ELMARAD!

Monday 23 Mar 2020, 11:00 → 13:00 Europe/Budapest

Tanacsterem

Groomed event shapes in electron-positron annihilation at high precision                                                               

We discuss the status of determinations of the strong coupling with special attention to using event shape observables based on data collected at the Large Electron Positron collider and theoretical predictions at highest accuracy available at present. We argue that such extractions can be competitive with lattice determinations if the observables are selected carefully such that both higher order perturbative as well as non-perturbative contributions are suppressed. We give a list of such observables and study one particular class–the groomed event shapes–in detail. We present predictions for the modified mass drop tagger groomed heavy jet mass at matched NNLO+NNNLL accuracy.