Optimisation of large-radius jet reconstruction for the ATLAS detector in 13 TeV proton-proton collisions

Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2918 more authors) (2021) Optimisation of large-radius jet reconstruction for the ATLAS detector in 13 TeV proton-proton collisions. EUROPEAN PHYSICAL JOURNAL C, 81 (4). 4-.

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Jet substructure has provided new opportunities for searches and measurements at the LHC, and has seen continuous development since the optimization of the large-radius jet definition used by ATLAS was performed during Run 1. A range of new inputs to jet reconstruction, pile-up mitigation techniques and jet grooming algorithms motivate an optimisation of large-radius jet reconstruction for ATLAS. In this paper, this optimisation procedure is presented, and the performance of a wide range of large-radius jet definitions is compared. The relative performance of these jet definitions is assessed using metrics such as their pileup stability, ability to identify hadronically decaying $W$ bosons and top quarks with large transverse momenta. A new type of jet input object, called a 'unified flow object' is introduced which combines calorimeter- and inner-detector-based signals in order to achieve optimal performance across a wide kinematic range. Large-radius jet definitions are identified which significantly improve on the current ATLAS baseline definition, and their modelling is studied using $pp$ collisions recorded by the ATLAS detector at $\sqrt{s}=13$ TeV during 2017.

Item Type: Article
Additional Information: 68 pages in total, author list starting page 52, 21 figures, 2 tables, submitted to EPJC. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/JETM-2018-06/
Uncontrolled Keywords: hep-ex, hep-ex
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 11 May 2021 07:44
Last Modified: 18 Jan 2023 22:48
DOI: 10.1140/epjc/s10052-021-09054-3
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3122203