Soft-Drop Thrust
Jeremy Baron, Simone Marzani, Vincent Theeuwes

TL;DR
Applying soft drop to event shapes in electron-positron collisions extends the region with minimal non-perturbative effects, aiding precise strong coupling measurements, but introduces complex perturbative considerations depending on the observable and jet parameters.
Contribution
This work adapts the soft drop technique from jet physics to event shape analysis in electron-positron annihilation, exploring its impact on non-perturbative corrections and perturbative calculability.
Findings
Soft drop significantly reduces non-perturbative effects in thrust distribution.
Jet mass with small radii shows promising behavior in the intermediate spectrum region.
Perturbative calculations are sensitive to the choice of event shape and jet parameters.
Abstract
Soft drop, a technique originally developed in the context of jet physics in proton-proton collisions in order to reduce the contamination from non-perturbative effects, is applied to event shapes in electron-positron annihilation. In particular, we study the thrust distribution at the pole and show that the region where non-perturbative corrections due to the hadronisation process are small is considerably extended if soft drop is applied. Therefore, we argue that the use of soft drop to reduce hadronisation effects is potentially of great benefit in the context of strong coupling determination using event shapes, which would be otherwise characterised by a strong correlation between and non-perturbative parameters. However, reduced sensitivity to hadronisation corrections is only one of the aspects that need to be considered. In this context, we show that perturbative…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
