Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 7, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP07(2021)076
Keywords
Jets; NLO Computations
Categories
Funding
- 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]
- Universita di Genova under the curiosity-driven grant Using jets to challenge the Standard Model of particle physics
- Italian Ministry of Research (MUR) [PRIN 20172LNEEZ]
- 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]
- French Agence Nationale de la Recherche [ANR-15-CE31-0016]
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This study focuses on the phenomenological analysis of angularities measured on the highest transverse-momentum jet in LHC events with associate production of a Z boson and jets. Utilizing Monte Carlo parton shower simulations, the impact of next-to-leading order matching and merging procedures is quantitavely assessed. The study ultimately arrives at an all-order expression with next-to-leading logarithmic accuracy resummation, matched to the exact NLO result, providing predictions that account for various factors such as soft emissions and experimental cuts.
We present a phenomenological study of angularities measured on the highest transverse-momentum jet in LHC events that feature the associate production of a Z boson and one or more jets. In particular, we study angularity distributions that are measured on jets with and without the SoftDrop grooming procedure. We begin our analysis exploiting state-of-the-art Monte Carlo parton shower simulations and we quantitatively assess the impact of next-to-leading order (NLO) matching and merging procedures. We then move to analytic resummation and arrive at an all-order expression that features the resummation of large logarithms at next-to-leading logarithmic accuracy (NLL) and is matched to the exact NLO result. Our predictions include the effect of soft emissions at large angles, treated as a power expansion in the jet radius, and non-global logarithms. Furthermore, matching to fixed-order is performed in such a way to ensure what is usually referred to as NLL ' accuracy. Our results account for realistic experimental cuts and can be easily compared to upcoming measurements of jet angularities from the LHC collaborations.
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