On Drell-Yan production of scalar leptoquarks coupling to heavy-quark flavours

Abstract

Given the hints of lepton-flavour non-universality in semi-leptonic $B$ decays, leptoquark (LQ) models with sizeable couplings to heavy-quark flavours are enjoying a renaissance. While such models are subject to stringent constraints from low-energy experiments also bounds from non-resonant dilepton searches at the Large Hadron Collider (LHC) turn out to be phenomenologically relevant. Based on the latest LHC dilepton analyses corresponding to an integrated luminosity of around $140{\mathrm{fb}}^{-1}$ of proton-proton collisions at $\sqrt{s}=13\mathrm{TeV}$, we present improved limits on the scalar LQ couplings that involve heavy-quark flavours and light or heavy dileptons. In particular, we show that effects beyond the leading order that are related to real QCD emissions are relevant in this context, since the inclusion of additional heavy-flavoured jets notably improves the exclusion limits that derive from the high-mass dilepton tails. The impact of electroweak corrections and interference effects between signal and background is also analysed. Within the POWHEG-BOX framework we provide a dedicated Monte Carlo code that allows for an on-the-fly signal event generation including all the LQ corrections considered in this article.

arXiv comment19 pages, 8 figures; v2: matches version accepted for publication in JHEP

References in corpus (56)

• The anti-k_t jet clustering algorithm
• An Introduction to PYTHIA 8.2
• FastJet user manual
• Asymptotic formulae for likelihood-based tests of new physics
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• Automatized One-Loop Calculations in 4 and D dimensions
• Generating Feynman Diagrams and Amplitudes with FeynArts 3
• Three-jet cross sections to next-to-leading order
• MadAnalysis 5, a user-friendly framework for collider phenomenology
• Physics of leptoquarks in precision experiments and at particle colliders
• Package-X: A Mathematica package for the analytic calculation of one-loop integrals
• The Path to Proton Structure at One-Percent Accuracy
• ParticleNet: Jet Tagging via Particle Clouds
• JaxoDraw: A graphical user interface for drawing Feynman diagrams. Version 2.0 release notes
• A general approach to jet cross sections in QCD
• Confronting lepton flavor universality violation in B decays with high-$p_T$ tau lepton searches at LHC
• Jet Flavour Classification Using DeepJet
• High-$p_T$ dilepton tails and flavour physics
• $R_{D^{(\ast )}}$ anomaly: A possible hint for natural supersymmetry with $R$-parity violation
• Pair production of scalar leptoquarks at the LHC
• Sudakov Effects in Electroweak Corrections
• $R(D^{(\ast )})$ in a general two Higgs doublet model
• Pair production of scalar leptoquarks at the Tevatron
• Reading the footprints of the B-meson flavor anomalies
• High-pT Signatures in Vector-Leptoquark Models
• The Leptoquark Hunter's Guide: Large Coupling
• Leptoquark toolbox for precision collider studies
• Pair Production of Scalar Leptoquarks at the LHC to NLO Parton Shower Accuracy
• $R_{D^{(\ast )}}$ motivated ${\mathcal{S}}_1$ leptoquark scenarios: Impact of interference on the exclusion limits from LHC data
• Hunting leptoquarks in monolepton searches
• Lepton-quark collisions at the Large Hadron Collider
• Precision predictions for scalar leptoquark pair-production at hadron colliders
• Combined Constraints on First Generation Leptoquarks
• Scalar Leptoquarks in Leptonic Processes
• Lepton Flavor Violation and Dilepton Tails at the LHC
• Anticipating Non-Resonant New Physics in Dilepton Angular Spectra at the LHC
• First-Generation New Physics in Simplified Models: From Low-Energy Parity Violation to the LHC
• Bottom-Flavored Mono-Tau Tails at the LHC
• Precise limits on the charge-$2/3$ $U_1$ vector leptoquark
• The Case for Future Hadron Colliders From $B\to K^{(\ast )}{\mu }^{+}{\mu }^{-}$ Decays
• NLO Leptoquark Production and Decay: The Narrow-Width Approximation and Beyond
• Indirect and monojet constraints on scalar leptoquarks
• Resonant third-generation leptoquark signatures at the Large Hadron Collider
• Leptons in the Proton
• New Physics in $b\to s\mu \mu$: FCC-hh or a Muon Collider?
• Non-resonant new physics search at the LHC for the $b\to c\tau \nu$ anomalies
• Hadron Collider Sensitivity to Fat Flavourful $Z^{\prime }$s for $R_{K^{(\ast )}}$
• Establishing a Search for $b\to s{\ell }^{+}{\ell }^{-}$ Anomalies at the LHC
• Correlating Non-Resonant Di-Electron Searches at the LHC to the Cabibbo-Angle Anomaly and Lepton Flavour Universality Violation
• Scalar leptoquark pair production at the LHC: precision predictions in the era of flavour anomalies
• Probing B-Anomalies via Dimuon Tails at a Future Collider
• Search for opposite sign muon-tau pair and a b-jet at LHC in the context of flavor anomalies

Cited by in corpus (10)

• Rare $b$ decays meet high-mass Drell-Yan
• Drell-Yan Tails Beyond the Standard Model
• Confronting the vector leptoquark hypothesis with new low- and high-energy data
• Fresh look at the LHC limits on scalar leptoquarks
• Drell-Yan production in third-generation gauge vector leptoquark models at NLO+PS in QCD
• Mutually elusive: vectorlike antileptons and leptoquarks
• Third-Family Lepton-Quark Fusion
• Search for resonant leptoquark production via lepton-jet signatures in $pp$ collisions at $\sqrt{s}=13$ TeV and $\sqrt{s}=13.6$ TeV with the ATLAS detector
• Searching for exclusive leptoquarks with the Nambu-Jona-Lasinio composite model at the LHC and HL-LHC
• Exploring mixed lepton-quark interactions in non-resonant leptoquark production at the LHC