TY - JOUR
T1 - Optimisation of large-radius jet reconstruction for the ATLAS detector in 13 TeV proton–proton collisions
AU - ATLAS Collaboration
AU - Newman, Paul
PY - 2021/4/19
Y1 - 2021/4/19
N2 - 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 s√=13 TeV during 2017.
AB - 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 s√=13 TeV during 2017.
KW - hep-ex
UR - http://www.scopus.com/inward/record.url?scp=85104634185&partnerID=8YFLogxK
U2 - 10.1140/epjc/s10052-021-09054-3
DO - 10.1140/epjc/s10052-021-09054-3
M3 - Article
SN - 1434-6044
VL - 81
JO - Eur. Phys. J. C
JF - Eur. Phys. J. C
IS - 4
M1 - 334
ER -