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Substructure of high-p_T Jets at the LHC

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arxiv 0807.0234 v1 pith:SF7CMRLN submitted 2008-07-02 hep-ph hep-ex

Substructure of high-p_T Jets at the LHC

classification hep-ph hep-ex
keywords jetsflowobservablesenergyhighly-boostedmassiveshapesanalyzed
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study high-pt jets from QCD and from highly-boosted massive particles such as tops, W, Z and Higgs, and argue that infrared-safe observables can help reduce QCD backgrounds. Jets from QCD are characterized by different patterns of energy flow compared to the products of highly-boosted heavy particle decays, and we employ a variety of jet shapes, observables restricted to energy flow within a jet, to explore this difference. Results from Monte Carlo generators and arguments based on perturbation theory support the discriminating power of the shapes we refer to as planar flow and angularities. We emphasize that for massive jets, these and other observables can be analyzed perturbatively.

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Forward citations

Cited by 3 Pith papers

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    Proof-of-principle for hadron-in-fat-jet AI tagging that yields an expected 95% CL limit of B(W±→π±γ) < 2.78×10^{-5} at 450 fb^{-1}.

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