This paper reports a detailed study of techniques for identifying boosted, hadronically decaying W bosons using 20fb−1 of proton-proton collision data collected by the ATLAS detector at the LHC at a centre-of-mass energy sqrt(s) = 8 TeV. A range of techniques for optimising the signal jet mass resolution are combined with various jet substructure variables. The results of these studies in Monte Carlo simulations show that a simple pairwise combination of groomed jet mass and one substructure variable can provide a 50% efficiency for identifying W bosons with transverse momenta larger than 200 GeV while maintaining multijet background efficiencies of 2-4% for jets with the same transverse momentum. These signal and background efficiencies are confirmed in data for a selection of tagging techniques.

Identification of boosted, hadronically decaying W bosons and comparisons with ATLAS data taken

CHIODINI, GABRIELE;GORINI, Edoardo;PRIMAVERA, Margherita;SPAGNOLO, Stefania Antonia;VENTURA, Andrea
2016-01-01

Abstract

This paper reports a detailed study of techniques for identifying boosted, hadronically decaying W bosons using 20fb−1 of proton-proton collision data collected by the ATLAS detector at the LHC at a centre-of-mass energy sqrt(s) = 8 TeV. A range of techniques for optimising the signal jet mass resolution are combined with various jet substructure variables. The results of these studies in Monte Carlo simulations show that a simple pairwise combination of groomed jet mass and one substructure variable can provide a 50% efficiency for identifying W bosons with transverse momenta larger than 200 GeV while maintaining multijet background efficiencies of 2-4% for jets with the same transverse momentum. These signal and background efficiencies are confirmed in data for a selection of tagging techniques.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11587/401563
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