Performance of top-quark and W-boson tagging with ATLAS in Run 2 of the LHC

Miucci, Antonio; Merlassino, Claudia; Haug, Sigve; Weber, Michael; Anders, John Kenneth; Beck, Hans Peter; Ereditato, Antonio; Rimoldi, Marco; Weston, Thomas Daniel (2019). Performance of top-quark and W-boson tagging with ATLAS in Run 2 of the LHC. The European physical journal. C, Particles and fields, 79(5) Springer 10.1140/epjc/s10052-019-6847-8

[img]
Preview
Text
Aaboud2019_Article_PerformanceOfTop-quarkAndVarve.pdf - Published Version
Available under License Creative Commons: Attribution (CC-BY).

Download (4MB) | Preview

The performance of identification algorithms (“taggers”) for hadronically decaying top quarks and W bosons in pp collisions at √s = 13 TeV recorded by the ATLAS experiment at the Large Hadron Collider is presented. A set of techniques based on jet shape observables are studied to determine a set of optimal cut-based taggers for use in physics analyses. The studies are extended to assess the utility of combinations of substructure observables as a multivariate tagger using boosted decision trees or deep neural networks in comparison with taggers based on two-variable combinations. In addition, for highly boosted top-quark tagging, a deep neural network based on jet constituent inputs as well as a re-optimisation of the shower deconstruction technique is presented. The performance of these taggers is studied in data collected during 2015 and 2016 corresponding to 36.1 fb−1 for the tt¯ and γ+jet and 36.7 fb−1 for the dijet event topologies.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Miucci, Antonio; Merlassino, Claudia; Haug, Sigve; Weber, Michael; Anders, John Kenneth; Beck, Hans Peter; Ereditato, Antonio; Rimoldi, Marco and Weston, Thomas Daniel

Subjects:

500 Science > 530 Physics

ISSN:

1434-6044

Publisher:

Springer

Language:

English

Submitter:

BORIS Import LHEP

Date Deposited:

16 Jun 2020 08:28

Last Modified:

16 Jun 2020 08:36

Publisher DOI:

10.1140/epjc/s10052-019-6847-8

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt; ATLAS collaboration

BORIS DOI:

10.7892/boris.143639

URI:

https://boris.unibe.ch/id/eprint/143639

Actions (login required)

Edit item Edit item
Provide Feedback