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Silvia Ferrario Ravasio, University of Oxford
Tuesday 01 December 2020, 16:00-17:00
Infrared renormalons in top-mass sensitive observables and kinematic distributions at the LHC
- 👤 Speaker: Silvia Ferrario Ravasio, University of Oxford
- 📅 Date & Time: Tuesday 01 December 2020, 16:00 - 17:00
- 📍 Venue: https://cern.zoom.us/j/99606064308?pwd=UjZKZ1c2dTV3WHRBcWlnQ2Fld0F1dz09
Abstract
An accurate measurement of the top mass and of the kinematic distributions of EW gauge bosons is a crucial part of the LHC physics program. The former is affected by non-perturbative corrections, also known as renormalons. Their impact is of the order of a typical hadronic scale $\Lambda$. If such corrections would be present also in the transverse-momentum distribution of the $Z$ boson, they would be comparable to the current theoretical uncertainty and potentially larger than the experimental one. In this talk I present a method that can be used to infer the presence of such renormalon corrections. We apply it to the case of single-top production to assess whether the mass renormalon propagates on top-mass dependent observables. We also investigate $Z$+jet production at hadron colliders, finding no numerical evidence of linear power corrections.
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