Many searches for Higgs bosons decaying to b quark pairs benefit from the increased Run II centre-of-mass energy by exploiting the boosted kinematic regime at large transverse momenta of the Higgs boson, where the two b-jets are merged into one large radius (R) jet. ATLAS [1] uses a boosted H → bb tagger algorithm to separate Higgs signal from background processes (QCD, W and Z bosons, top quarks). The tagger takes as input a large R = 1.0 jet with calibrated pseudorapidity, energy and mass

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... e. It employs b-tagging, Higgs candidate mass, and substructure information. The performance of several operating points in Higgs boson signal, QCD, and tt all-hadronic backgrounds are presented. Systematic uncertainties are evaluated so that this tagger can be used in analyses.