Energy correlation functions for jet substructure
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Thaler_Energy correlation.pdf
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1.42 MB
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Author(s)
Salam, Gavin P.
Thaler, Jesse
Larkoski, Andrew
Date Issued
June 2013
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
Larkoski, Andrew J., Gavin P. Salam, and Jesse Thaler. Energy correlation functions for jet substructure. Journal of High Energy Physics (June 2013), 2013: 108.
Version
Final published version
Abstract
We show how generalized energy correlation functions can be used as a powerful probe of jet substructure. These correlation functions are based on the energies and pair-wise angles of particles within a jet, with (N + 1)-point correlators sensitive to N-prong substructure. Unlike many previous jet substructure methods, these correlation functions do not require the explicit identification of subjet regions. In addition, the correlation functions are better probes of certain soft and collinear features that are masked by other methods. We present three Monte Carlo case studies to illustrate the utility of these observables: 2-point correlators for quark/gluon discrimination, 3-point correlators for boosted W /Z/Higgs boson identification, and 4-point correlators for boosted top quark identification. For quark/gluon discrimination, the 2-point correlator is particularly powerful, as can be understood via a next-to-leading logarithmic calculation. For boosted 2-prong resonances the benefit depends on the mass of the resonance.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1007/JHEP06(2013)108
