期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 7, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP07(2021)142
关键词
Resummation; Perturbative QCD
资金
- Gottingen University
- European Union's Horizon 2020 research and innovation programme, Marie Sklodowska-Curie Innovative Training Network MCnetITN3 [722104]
- Fulbright-Cottrell Award
- BMBF [05H18MGCA1]
- Fermi Research Alliance, LLC (FRA) [DE-AC02-07CH11359]
Soft-drop grooming of hadron-collision final states has the potential to reduce the impact of non-perturbative corrections, enabling more direct comparison of accurate perturbative predictions with experimental measurements. The study shows that soft-drop grooming is efficient in removing the underlying event, motivating future experimental measurements to be compared with precise QCD predictions and constrain non-perturbative models in Monte Carlo simulations.
Soft-drop grooming of hadron-collision final states has the potential to significantly reduce the impact of non-perturbative corrections, and in particular the underlying-event contribution. This eventually will enable a more direct comparison of accurate perturbative predictions with experimental measurements. In this study we consider soft-drop groomed dijet event shapes. We derive general results needed to perform the resummation of suitable event-shape variables to next-to-leading logarithmic (NLL) accuracy matched to exact next-to-leading order (NLO) QCD matrix elements. We compile predictions for the transverse-thrust shape accurate to NLO + NLL ' using the implementation of the Caesar formalism in the Sherpa event generator framework. We complement this by state-of-the-art parton- and hadron-level predictions based on NLO QCD matrix elements matched with parton showers. We explore the potential to mitigate non-perturbative corrections for particle-level and track-based measurements of transverse thrust by considering a wide range of soft-drop parameters. We find that soft-drop grooming indeed is very efficient in removing the underlying event. This motivates future experimental measurements to be compared to precise QCD predictions and employed to constrain non-perturbative models in Monte-Carlo simulations.
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