期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 11, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP11(2019)179
关键词
Jets; QCD Phenomenology
资金
- German Academic Exchange Service (DAAD)
- German Federal Ministry of Education and Research (BMBF)
- People Programme (Marie Curie Actions) of the European Union Seventh Framework Programme (FP7/2007-2013) under REA grant [605728]
- European Union's Horizon 2020 research and innovation programme as part of the Marie Sklodowska-Curie Innovative Training Network MCnetITN3 [722104]
- Fulbright-Cottrell Award
- BMBF [05H18MGCA1]
- German-American Fulbright Commission
- CNRS
- IPhT
- French Agence Nationale de la Recherche [ANR-15-CE31-0016]
- curiosity-driven grant Using jets to challenge the Standard Model of particle physics from Universita di Genova
- [DE-AC02-07CH11359]
Soft drop has been shown to reduce hadronisation effects at e(+)e(-) colliders for the thrust event shape. In this context, we perform fits of the strong coupling constant for the soft-drop thrust distribution at NLO+NLL accuracy to pseudo data generated by the Sherpa event generator. In particular, we focus on the impact of hadronisation corrections, which we estimate both with an analytical model and a Monte-Carlo based one, on the fitted value of alpha(s)(m(Z)). We find that grooming can reduce the size of the shift in the fitted value of alpha(s) due to hadronisation. In addition, we also explore the possibility of extending the fitting range down to significantly lower values of (one minus) thrust. Here, soft drop is shown to play a crucial role, allowing us to maintain good fit qualities and stable values of the fitted strong coupling. The results of these studies show that soft-drop thrust is a promising candidate for fitting alpha(s) at e(+)e(-) colliders with reduced impact of hadronisation effects.
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