Identification of boosted, hadronically decaying W bosons and comparisons with ATLAS data taken at s√=8 TeV

G. OTERO Y GARZON; ATLAS COLLABORATION; R. PIEGAIA

EUROPEAN PHYSICAL JOURNAL C - PARTICLES AND FIELDS

SPRINGER

Lugar: Berlin; Año: 2016 vol. 73 p. 1 - 47

1434-6044

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