Identification of boosted, hadronically decaying W bosons and comparisons with ATLAS data taken at root s=8 TeV
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KünyeAad, G., Abbott, B., Abdallah, J., Abdinov, O., Aben, R., Abolins, M. … ATLAS Collaboration. (2016). Identification of boosted, hadronically decaying W bosons and comparisons with ATLAS data taken at root s=8 TeV. European Physical Journal C, 76(3), 1-47. http://dx.doi.org/10.1140/epjc/s10052-016-3978-z
This 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 the ATLAS detector at the LHC at a centre-of-mass energy root 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.