Aad, G.G.AadAbbott, B.B.AbbottAbdallah, J.J.AbdallahAbdinov, O.O.AbdinovAben, R.R.AbenAbolins, M.M.AbolinsAbouZeid, O. S.O. S.AbouZeidAbramowicz, H.H.AbramowiczAbreu, H.H.AbreuAbreu, R.R.AbreuZwalinski, L.L.Zwalinski2019-07-092019-07-092016https://resolver.sub.uni-goettingen.de/purl?gro-2/58628This paper reports a detailed study of techniques for identifying boosted, hadronically decaying W bosons using 20.3 fb−1 of proton–proton collision data collected by t√he ATLAS detector at the LHC at a centre-of-mass energy 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 showthat 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.enCC BY 4.0530journal_article10.1140/epjc/s10052-016-3978-zhttps://resolver.sub.uni-goettingen.de/purl?gs-1/13161