Matching matrix elements and shower evolution for top-quark production in hadronic collisions

Abstract

We study the matching of multijet matrix elements and shower evolution in the case of top production in hadronic collisions at the Tevatron and at the LHC. We present the results of the matching algorithm implemented in the ALPGEN Monte Carlo generator, and compare them with results obtained at the parton level, and with the predictions of the MC@NLO approach. We highlight the consistency of the matching algorithm when applied to these final states, and the excellent agreement obtained with MC@NLO for most inclusive quantities. We nevertheless identify also a remarkable difference in the rapidity spectrum of the leading jet accompanying the top quark pair, and comment on the likely origin of this discrepancy.

22 pages, 13 figures, 5 tables. JHEP style

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• Revisiting singlino dark matter of the natural $Z_3$-symmetric NMSSM in the light of LHC
• First interpretation of 13 TeV supersymmetry searches in the pMSSM
• Mu_x boosted-bottom-jet tagging and Z-prime boson searches
• Status and developments of event generators
• LHC constraints on electroweakino dark matter revisited
• Search for supersymmetry in final states with a single electron or muon using angular correlations and heavy-object identification in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• A twisted tale of the transverse-mass tail
• Interpretations of the ATLAS measurements of Higgs boson production and decay rates and differential cross-sections in $pp$ collisions at $\sqrt{s}=13$ TeV
• Measurement of the top quark pole mass using $\mathrm{t}\bar{\mathrm{t}}$+jet events in the dilepton final state in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Revealing the jet substructure in a compressed spectrum
• Closing in on compressed gluino-neutralino spectra at the LHC
• Search for emerging jets in $pp$ collisions at $\sqrt{s}=13.6$ TeV with the ATLAS experiment
• Sbottoms of Natural NMSSM at the LHC
• Models of 750 GeV quarkonium and the LHC excesses
• Expanding the parameter space of natural supersymmetry
• The left-right supersymmetric option at a high-energy upgrade of the LHC
• Measurement of the production and differential cross sections of $W^{+}{W}^{-}$ bosons in association with jets in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV
• Merging High Energy with Soft and Collinear Logarithms using HEJ and PYTHIA
• Monojet Signatures from Heavy Colored Particles: Future Collider Sensitivities and Theoretical Uncertainties
• Study of interference effects in the search for flavour-changing neutral current interactions involving the top quark and a photon or a $Z$ boson at the LHC
• Search for new physics using effective field theory in 13 TeV pp collision events that contain a top quark pair and a boosted Z or Higgs boson
• Isospin-Violating Dark Matter at the LHC
• Dark matter and Collider signals in supersymmetric $U(1{)}^{\prime }$ models with non-universal $Z^{\prime }$ couplings
• Probing quadruplet scalar dark matter at current and future $pp$ colliders
• Dark sectors and enhanced $h\to \tau \mu$ transitions
• Phenomenology at the Large Hadron Collider with Deep Learning: the case of vector-like quarks decaying to light jets
• The Charged Higgs from the Bottom-Up: Probing Flavor at the LHC
• Data Driven Search in the Displaced $b\bar{b}$ Pair Channel for a Higgs Boson Decaying to Long-Lived Neutral Particles
• Strategy to measure tau $g-2$ via photon fusion in LHC proton collisions
• What the top asymmetries tell us about single top production and Higgs decays
• t-channel dark matter at the LHC -- a whitepaper
• Leptonic signatures of color-sextet scalars
• Prospect and implications of $cg\to b{H}^{+}\to bA{W}^{+}$ production at the LHC
• Hexapod Coloron at the LHC
• Search for new phenomena in events with two $Z$ bosons and missing transverse momentum in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV
• Monte Carlo study of gg->H+jets contribution to Vector Boson Fusion Higgs production at the LHC
• A Projective Phase Space Generator for Hadronic Vector Boson Plus One Jet Production
• Multi-Higgs Boson Probes of the Dark Sector
• Standard Model Higgs Boson Searches through the 125 GeV Boson Discovery
• Pseudoscalar pair production via off-shell Higgs in composite Higgs models
• Four top final states with NLO accuracy in perturbative QCD: 3 lepton channel
• LHC probes of TeV-scale scalars in $\mathrm{SO}(10)$ grand unification
• Gluino Meets Flavored Naturalness
• Studies of Quantum Chromodynamics at the LHC
• Searching For Resonances inside Top-like Events
• SUSY Signals from QCD Production at the Upgraded LHC
• Inert sextuplet scalar dark matter at the LHC and future colliders
• Measurement of the Z boson differential production cross section using its invisible decay mode (Z $\to$ $\nu \bar{\nu }$) in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Constraints on Mediator Coupled to Heavy Quarks from LHC Data
• Monojet signatures from gluino and squark decays
• Collider fingerprints of freeze-in dark matter produced during the fast expansion phase of Universe
• Constraining slepton and chargino through compressed top squark search
• Distinguishing Signatures of top-and bottom-type heavy vectorlike quarks at the LHC
• Jet observables and stops at 100 TeV collider
• Jet Substructure Probe on Scalar Leptoquark Models via Top Polarization
• Novel Higgsino Dark Matter Signatures at the LHC
• Measurement of the Higgs boson production via vector boson fusion and its decay into bottom quarks in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Search for the Neutral Current Top Quark Decay t-->Zc Using the Ratio of Z-Boson + 4 Jets to W-Boson + 4 Jets Production
• Influence of QCD parton shower in deep learning invisible Higgs through vector boson fusion
• An equal-velocity scenario for hiding dark matter at the LHC
• Riemannian Data preprocessing in Machine Learning to focus on QCD color structure
• A joint explanation for the soft lepton and monojet LHC excesses in the wino-bino model
• Same-Sign Taus Signatures of Maximally Flavor-Violating Scalars at the LHC
• Measurement of the inclusive $t\bar{t}$ production cross section in the lepton+jets channel in $pp$ collisions at $\sqrt{s}$= 7 TeV with the ATLAS detector using support vector machines
• Study on the azimuthal angle correlation between two jets in the top quark pair production
• Experimental Studies of Top Quark Production
• Improving heavy Dirac neutrino prospects at future hadron colliders using machine learning
• Search strategy for gluinos at the LHC with a Higgs boson decaying into tau leptons
• Supersymmetry after the Higgs discovery and its LHC phenomenology
• Constraining electroweak and strongly charged long-lived particles with CheckMATE
• 2B or not 2B, a study of bottom-quark-philic semi-visible jets
• Searching for exclusive leptoquarks with the Nambu-Jona-Lasinio composite model at the LHC and HL-LHC
• Supersymmetry - When Theory Inspires Experimental Searches
• Investigating the Violation of Charge Parity Symmetry Through Top Quark Chromo-Electric Dipole Moments by Using Machine Learning Techniques
• Status of G2HDM with right handed neutrino coupling in the light of $b\to c\tau \nu$ anomalies
• Improving smuon searches with Neural Networks
• Collider imprint of vector-like leptons in light of anomalous magnetic moment and neutrino data
• Signs of Tops from Highly Mixed Stops
• Exclusion limits on a scalar decaying to photons and distinguishing its production mechanisms
• Exotic coloured fermions and lepton number violation at the LHC
• Recent developments in POWHEG
• Implementation of full and simplified likelihoods in CheckMATE
• Prospect study for measurement of $Hb\bar{b}$ coupling at the LHC and FCC-hh
• Present Limits on the Precision of SM Predictions for Jet Energies
• Heavy Higgs Coupled to Vector-like Quarks: Strong CP Problem and Search Prospects at the 14 TeV LHC
• Searching for top-philic heavy resonances in boosted four-top final states
• LHC and Tevatron constraints on a W' model interpretation of the top quark forward-backward asymmetry
• Search for dark matter produced in association with one or two top quarks in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Tagging fully hadronic exotic decays of the vectorlike $\mathbf{B}$ quark using a graph neural network
• Search for an exotic decay of the 125 GeV Higgs boson to a pair of light pseudoscalars in the final state of two muons and two c-quarks in proton-proton collisions at $\sqrt{s}=13\text{TeV}$ with CMS Open Data
• Probing new physics at the LHC with $\mathrm{b}\tau \nu$ final states
• Collider phenomenology of new neutral scalars in a flavoured multi-Higgs model
• Searching for Gluino LSP at the LHC
• Vector boson plus multijet production
• Modelling electroweak physics for the forward region
• Monte Carlo for the LHC
• Measurement of the differential cross sections for $W$-boson production in association with jets in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV
• Higgs boson physics and broken flavor symmetry -- LHC phenomenology
• All-Order Corrections To Higgs Boson Production In Association With Jets
• Deciphering compressed electroweakino excesses with MadAnalysis 5
• Tutorial Note on Merging Matrix Elements with Parton Showers
• Vector-Like top quark production via a chromo-magnetic moment at the LHC
• Improving sensitivity of vectorlike top partner searches with jet substructure
• A simple merging algorithm for jet angular correlation studies
• Higgs and $Z$ Assisted Stop Searches at Hadron Colliders
• Theory, phenomenology, and experimental avenues for dark showers: a Snowmass 2021 report
• Theoretical modeling of QCD radiation in off-shell Higgs production through gluon fusion