Identifying boosted objects with N-subjettiness
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Author(s)
Thaler, Jesse
Van Tilburg, Ken
Date Issued
March 2011
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
Thaler, Jesse, and Ken Tilburg. “Identifying boosted objects with N-subjettiness.” Journal of High Energy Physics 2011.3 (2011).
Version
Author's final manuscript
Abstract
We introduce a new jet shape—N-subjettiness—designed to identify boosted
hadronically-decaying objects like electroweak bosons and top quarks. Combined with a
jet invariant mass cut, N-subjettiness is an effective discriminating variable for tagging
boosted objects and rejecting the background of QCD jets with large invariant mass. In
efficiency studies of boosted W bosons and top quarks, we find tagging efficiencies of 30%
are achievable with fake rates of 1%. We also consider the discovery potential for new
heavy resonances that decay to pairs of boosted objects, and find significant improvements
are possible using N-subjettiness. In this way, N-subjettiness combines the advantages of
jet shapes with the discriminating power seen in previous jet substructure algorithms.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
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Creative Commons Attribution-Noncommercial-Share Alike 3.0
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/jhep03(2011)015
