Precise probing and discrimination of third-generation scalar leptoquarks

Abstract

We explore the pair production of third-generation scalar leptoquark at the Large Hadron Collider to next-to-leading order accuracy in QCD, matched to parton shower for a precise probing of the stemming model. We propose to tag two boosted top-like fatjets produced from the decay of heavy leptoquarks in association with notably large missing transverse momentum and consider them as the potential signal. Such a signal demonstrates the capability of a robust discovery prospect in the multivariate analysis with different high-level observables, including jet substructure variables. Various scalar leptoquark models predict different chirality of the top quark appearing from the decay of the leptoquark carrying same electromagnetic charge. We make use of the polarization variables sensitive to the top quark polarization in order to identify the underlying theory.

arXiv comment36 pages, 13 figures, 9 tables, This version matches the published version in Physical Review D

References in corpus (63)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• FastJet user manual
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• Matching NLO QCD computations and parton shower simulations
• UFO - The Universal FeynRules Output
• Better Jet Clustering Algorithms
• Jet substructure as a new Higgs search channel at the LHC
• Identifying Boosted Objects with N-subjettiness
• Three-jet cross sections to next-to-leading order
• Vector boson pair production at the LHC
• Measuring masses of semi-invisibly decaying particles pair produced at hadron colliders
• Vector boson production at hadron colliders: a fully exclusive QCD calculation at NNLO
• Reducing full one-loop amplitudes to scalar integrals at the integrand level
• JaxoDraw: A graphical user interface for drawing Feynman diagrams
• Measurement of an Excess of B -> D(*) Tau Nu Decays and Implications for Charged Higgs Bosons
• Matching matrix elements and shower evolution for top-quark production in hadronic collisions
• Jet Trimming
• Physics of leptoquarks in precision experiments and at particle colliders
• Measurement of the ratio of branching fractions $\mathcal{B}({\overline{B}}^0\to D^{\ast +}{\tau }^{-}{\overline{\nu }}_{\tau })/\mathcal{B}({\overline{B}}^0\to D^{\ast +}{\mu }^{-}{\overline{\nu }}_{\mu })$
• Maximizing Boosted Top Identification by Minimizing N-subjettiness
• Recombination Algorithms and Jet Substructure: Pruning as a Tool for Heavy Particle Searches
• A general approach to jet cross sections in QCD
• Techniques for improved heavy particle searches with jet substructure
• Automatic evaluation of UV and R2 terms for beyond the Standard Model Lagrangians: a proof-of-principle
• Pair production of scalar leptoquarks at the LHC
• Test of lepton-flavor universality in $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ decays at Belle
• Helicity fractions of W bosons from top quark decays at NNLO in QCD
• Test of lepton flavor universality and search for lepton flavor violation in $B\to K\ell \ell$ decays
• Measurement of the W boson polarization in top quark decays with the ATLAS detector
• Search for a scalar partner of the top quark in the all-hadronic $t\bar{t}$ plus missing transverse momentum final state at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for pairs of scalar leptoquarks decaying into quarks and electrons or muons in $\sqrt{s}=13$ TeV pp collisions with the ATLAS detector
• Guide to transverse projections and mass-constraining variables
• Pair Production of Scalar Leptoquarks at the LHC to NLO Parton Shower Accuracy
• Combination of electroweak and QCD corrections to single W production at the Fermilab Tevatron and the CERN LHC
• \sqrt{s}_min: a global inclusive variable for determining the mass scale of new physics in events with missing energy at hadron colliders
• Lepton distribution as a probe of new physics in production and decay of the t quark and its polarization
• Searches for third-generation scalar leptoquarks in $\sqrt{s}$ = 13 TeV pp collisions with the ATLAS detector
• On measurement of top polarization as a probe of $t\bar{t}$ production mechanisms at the LHC
• Search for singly and pair-produced leptoquarks coupling to third-generation fermions in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Constraints on models of scalar and vector leptoquarks decaying to a quark and a neutrino at $\sqrt{s}=$ 13 TeV
• Polarized tops from new physics: signals and observables
• Top Quark Pair Production beyond NNLO
• Search for pair production of second-generation leptoquarks at $\sqrt{s}=$ 13 TeV
• Measuring the Polarization of Boosted Hadronic Tops
• Search for pair production of first-generation scalar leptoquarks at $\sqrt{s}=$ 13 TeV
• Searches for scalar leptoquarks and differential cross-section measurements in dilepton-dijet events in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}$ = 13 TeV with the ATLAS experiment
• Hunting scalar leptoquarks with boosted tops and light leptons
• Searching for third-generation composite leptoquarks at the LHC
• Leptoquark manoeuvres in the dark: a simultaneous solution of the dark matter problem and the $R_{D^{(\ast )}}$ anomalies
• Top Polarization and Stop Mixing from Boosted Jet Substructure
• Improving third-generation leptoquark searches with combined signals and boosted top
• Seeking leptoquarks in the $\mathbf{t}\bar{\mathbf{t}}$ plus missing energy channel at the high-luminosity LHC
• Top-philic Dark Matter in a Hybrid KSVZ axion framework
• Precise probing of the inert Higgs-doublet model at the LHC
• Search for pair-produced scalar and vector leptoquarks decaying into third-generation quarks and first- or second-generation leptons in pp collisions with the ATLAS detector
• Determining the helicity structure of third generation resonances
• Top polarization as a probe of new physics
• Distinguishing Leptoquarks at the LHC/FCC
• Boosted top quark tagging and polarization measurement using machine learning
• Decays of polarized top quarks to lepton, neutrino and jets at NLO QCD
• Distinguishing Standard Model Extensions using Monotop Chirality at the LHC
• New Method for Reconstructing Effective Top Quark Spin

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• Precision prediction of a democratic up-family philic KSVZ axion model at the LHC
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• Unveiling desert region in inert doublet model assisted by Peccei-Quinn symmetry
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