Measuring the Polarization of Boosted Hadronic Tops

Abstract

We propose a new technique for measuring the polarization of hadronically decaying boosted top quarks. In particular, we apply a subjet-based technique to events where the decay products of the top are clustered within a single jet. The technique requires neither b-tagging nor W-reconstruction, and does not rely on assumptions about either the top production mechanism or the sources of missing energy in the event. We include results for various new physics scenarios made with different Monte Carlo generators to demonstrate the robustness of the technique.

v2: version accepted for publication in JHEP

References in corpus (24)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The anti-k_t jet clustering algorithm
• Herwig++ Physics and Manual
• Electroweak symmetry breaking from dimensional deconstruction
• MadEvent: Automatic Event Generation with MadGraph
• RS1, Custodial Isospin and Precision Tests
• Top-tagging: A Method for Identifying Boosted Hadronic Tops
• Techniques for improved heavy particle searches with jet substructure
• Strategies to Identify Boosted Tops
• Substructure of high-p_T Jets at the LHC
• The Bulk RS KK-gluon at the LHC
• Top pair invariant mass distribution: a window on new physics
• Searching for the Kaluza-Klein Graviton in Bulk RS Models
• QCD-corrected spin analysing power of jets in decays of polarized top quarks
• Top Quark Pairs at High Invariant Mass - A Model-Independent Discriminator of New Physics at the LHC
• Using jet mass to discover vector quarks at the LHC
• Polarized Tops from Stop Decays at the LHC
• Polarized tops from new physics: signals and observables
• Top-antitop and Top-top Resonances in the Dilepton Channel at the CERN LHC
• Top Quark Physics
• High p_T Top Quarks at the Large Hadron Collider
• Searching for t-bar t Resonances at the Large Hadron Collider
• Double fermionic contributions to the heavy-quark vacuum polarization

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• W-jet Tagging: Optimizing the Identification of Boosted Hadronically-Decaying W Bosons
• Top polarization, forward-backward asymmetry and new physics
• On measurement of top polarization as a probe of $t\bar{t}$ production mechanisms at the LHC
• Chiral Couplings of W' and Top Quark Polarization at the LHC
• Pure Samples of Quark and Gluon Jets at the LHC
• New approach to identifying boosted hadronically-decaying particle using jet substructure in its center-of-mass frame
• Top polarisation studies in $H^{-}t$ and $Wt$ production
• Enhanced $thj$ signal at the LHC with $h\to \gamma \gamma$ decay and $\mathcal{C}\mathcal{P}$-violating top-Higgs coupling
• Top Polarization in Stop Production at the LHC
• Composite Octet Searches with Jet Substructure
• Top Polarization and Stop Mixing from Boosted Jet Substructure
• Discriminating Top-Antitop Resonances using Azimuthal Decay Correlations
• Boosted Top Quark Signals for Heavy Vector Boson Excitations in a Universal Extra Dimension Model
• Is the 125 GeV Higgs the superpartner of a neutrino?
• Three-Prong Distribution of Massive Narrow QCD Jets
• Heavy Squarks at the LHC
• Boosted top quark tagging and polarization measurement using machine learning
• Boosted top quarks in supersymmetric cascade decays at the LHC
• Tagging Boosted Ws with Wavelets
• Precise probing and discrimination of third-generation scalar leptoquarks
• Boosted Top quark polarization
• Using Jet Substructure at the LHC to Search for the Light Higgs Bosons of the CP-Violating MSSM
• Multiple Z' -> t-tbar signals in a 4D Composite Higgs Model
• Azimuthal Angular Correlation as a Boosted Top Jet Substructure
• Jet substructures of boosted polarized top quarks
• Jet substructures of boosted polarized hadronic tops
• Analytical Insights on Hadronic Top Quark Polarimetry
• Identifying boosted hadronically decaying top quark using jet substructure in its center-of-mass frame
• Tracking the Identities of Boosted Particles
• Studies of high-transverse momentum jet substructure and top quarks produced in 1.96 TeV proton-antiproton collisions
• Uncovering quasi-degenerate Kaluza-Klein Electro-Weak gauge bosons with top asymmetries at the LHC
• Identifying the b quark inside a boosted hadronically decaying top quark using jet substructure in its center-of-mass frame
• Spin analyzing power for polarized top decays with jets
• Top Polarization in Sbottom Decays at the LHC
• Constraining new resonant physics with top spin polarisation information
• Tagging a Boosted Top quark with a $\tau$ final state
• Analyzing polarized boosted top from stop decay at high luminosity and high energy LHC
• QCD resummation for high-p${}_T$ jet shapes at hadron colliders
• Energy profile of b-jet for boosted top quarks