Template Overlap Method for Massive Jets
arXiv:1006.2035 · doi:10.1103/PhysRevD.82.054034
Abstract
We introduce a new class of infrared safe jet observables, which we refer to as template overlaps, designed to filter targeted highly boosted particle decays from QCD jets and other background. Template overlaps are functional measures that quantify how well the energy flow of a physical jet matches the flow of a boosted partonic decay. Any region of the partonic phase space for the boosted decays defines a template. We will refer to the maximum functional overlap found this way as the template overlap. To illustrate the method, we test lowest-order templates designed to distinguish highly-boosted top and Higgs decays from backgrounds produced by event generators. For the functional overlap, we find good results with a simple construction based on a Gaussian in energy differences within angular regions surrounding the template partons. Although different event generators give different averages for our template overlaps, we find in each case excellent rejection power, especially when combined with cuts based on jet shapes. The template overlaps are capable of systematic improvement by including higher order corrections in the template phase space.
24 pages, 10 figures
References in corpus (22)
- PYTHIA 6.4 Physics and Manual
- Event generation with SHERPA 1.1
- Jet substructure as a new Higgs search channel at the LHC
- Conformal collider physics: Energy and charge correlations
- Top-tagging: A Method for Identifying Boosted Hadronic Tops
- Techniques for improved heavy particle searches with jet substructure
- Strategies to Identify Boosted Tops
- Warped Gravitons at the LHC and Beyond
- Jets from Massive Unstable Particles: Top-Mass Determination
- The Bulk RS KK-gluon at the LHC
- Top Jets in the Peak Region: Factorization Analysis with NLL Resummation
- LHC Signals for Warped Electroweak Neutral Gauge Bosons
- Momentum Flow Correlations from Event Shapes: Factorized Soft Gluons and Soft-Collinear Effective Theory
- Factorization of e+e- Event Shape Distributions with Hadronic Final States in Soft Collinear Effective Theory
- Searching for the Kaluza-Klein Graviton in Bulk RS Models
- Top Jets at the LHC
- Jets in Hadron-Hadron Collisions
- Top Mass Measurements from Jets and the Tevatron Top-Quark Mass
- Reconstructing Sparticle Mass Spectra using Hadronic Decays
- Kaluza-Klein Gluons as a Diagnostic of Warped Models
- Measurement of the Top Quark Mass and ppbar -> ttbar Cross Section in the All-Hadronic Mode with the CDFII Detector
- Jet reconstruction in hadronic collisions by Gaussian filtering
Cited by in corpus (8)
- Boosted objects: a probe of beyond the Standard Model physics
- Jet Substructure Without Trees
- W-jet Tagging: Optimizing the Identification of Boosted Hadronically-Decaying W Bosons
- Boosting Higgs discovery - the forgotten channel
- Unravelling an Extra Neutral Gauge Boson at the LHC using Third Generation Fermions
- Ditau-Jet Tagging and Boosted Higgses from a Multi-TeV Resonance
- New approach for jet-shape identification of TeV-scale particles at the LHC
- Perturbative QCD for the LHC