Resonant third-generation leptoquark signatures at the Large Hadron Collider

Abstract

Given the hints of lepton-flavour non-universality in $B$-meson decays, leptoquarks (LQs) are enjoying a renaissance. We propose novel Large Hadron Collider (LHC) searches for such hypothetical states that do not rely on strong production only, but can also receive important contributions from quark-lepton annihilation. For the cases of a resonant signal involving a bottom quark and a tau lepton ($b+\tau$), a top quark and missing transverse energy ($E_T^{\mathrm{miss}}$) and light-flavour jets plus $E_T^{\mathrm{miss}}$, we develop realistic analysis strategies and provide detailed evaluations of the achievable sensitivities for the corresponding LQ signatures at future LHC runs. Our analyses allow us to derive a series of stringent constraints on the masses and couplings of third-generation singlet vector LQs, showing that at LHC Run III and the high-luminosity LHC the proposed search channels can probe interesting parts of the LQ parameter space addressing the $B$-physics anomalies. In view of the reach of the proposed $b+\tau$ signature, we recommend that dedicated resonance searches for this final state should be added to the exotics search canon of both ATLAS and CMS.

arXiv comment23 pages, 11 figures; v2: minor modifications and additions to the text, one figure added. Matches version published in JHEP

References in corpus (90)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The anti-k_t jet clustering algorithm
• An Introduction to PYTHIA 8.2
• FastJet user manual
• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• The total top quark pair production cross-section at hadron colliders through O(alpha_S^4)
• Top++: a program for the calculation of the top-pair cross-section at hadron colliders
• QCD Matrix Elements + Parton Showers
• Test of lepton universality using $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• High-precision QCD at hadron colliders: electroweak gauge boson rapidity distributions at NNLO
• Evidence for an excess of B -> D(*) Tau Nu decays
• Single-top Wt-channel production matched with parton showers using the POWHEG method
• Test of lepton universality with $B^0\to K^{\ast 0}{\ell }^{+}{\ell }^{-}$ decays
• Measurement of the branching ratio of $\bar{B}\to D^{(\ast )}{\tau }^{-}{\bar{\nu }}_{\tau }$ relative to $\bar{B}\to D^{(\ast )}{\ell }^{-}{\bar{\nu }}_{\ell }$ decays with hadronic tagging at Belle
• Physics of leptoquarks in precision experiments and at particle colliders
• Measurement of the ratio of branching fractions $\mathcal{B}({\overline{B}}^0\to D^{\ast +}{\tau }^{-}{\overline{\nu }}_{\tau })/\mathcal{B}({\overline{B}}^0\to D^{\ast +}{\mu }^{-}{\overline{\nu }}_{\mu })$
• Expected Performance of the ATLAS Experiment - Detector, Trigger and Physics
• B-physics anomalies: a guide to combined explanations
• Measurement of the $\tau$ lepton polarization and $R(D^{\ast })$ in the decay $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$
• ATLAS $b$-jet identification performance and efficiency measurement with $t\bar{t}$ events in $pp$ collisions at $\sqrt{s}=13$ TeV
• Measurement of the branching ratio of ${\bar{B}}^0\to D^{\ast +}{\tau }^{-}{\bar{\nu }}_{\tau }$ relative to ${\bar{B}}^0\to D^{\ast +}{\ell }^{-}{\bar{\nu }}_{\ell }$ decays with a semileptonic tagging method
• Effective field theory approach to $b\to s\ell {\ell }^{(\prime )}$, $B\to K^{(\ast )}\nu \bar{\nu }$ and $B\to D^{(\ast )}\tau \nu$ with third generation couplings
• Search for new phenomena in final states with an energetic jet and large missing transverse momentum in pp collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Anomalies in $B$-decays and $U(2)$ flavour symmetry
• Vector leptoquark resolution of $R_K$ and $R_{D^{(\ast )}}$ puzzles
• Measurement of the ratio of the $B^0\to D^{\ast -}{\tau }^{+}{\nu }_{\tau }$ and $B^0\to D^{\ast -}{\mu }^{+}{\nu }_{\mu }$ branching fractions using three-prong $\tau$-lepton decays
• A three-site gauge model for flavor hierarchies and flavor anomalies
• W+W-, WZ and ZZ production in the POWHEG BOX
• Confronting lepton flavor universality violation in B decays with high-$p_T$ tau lepton searches at LHC
• Search for dark matter and other new phenomena in events with an energetic jet and large missing transverse momentum using the ATLAS detector
• $B$ Meson Anomalies in a Pati-Salam Model within the Randall-Sundrum Background
• Gauge leptoquark as the origin of B-physics anomalies
• Closing the window on single leptoquark solutions to the $B$-physics anomalies
• B-decay discrepancies after Moriond 2019
• A model of vector leptoquarks in view of the $B$-physics anomalies
• Baryon Number and Lepton Universality Violation in Leptoquark and Diquark Models
• Illuminating the photon content of the proton within a global PDF analysis
• Search for new phenomena in final states with an energetic jet and large missing transverse momentum in $pp$ collisions at $\sqrt{s}=13$ TeV using the ATLAS detector
• Third Family Quark-Lepton Unification at the TeV Scale
• B-decay Anomalies in a Composite Leptoquark Model
• W+W-, WZ and ZZ production in the POWHEG BOX V2
• Top-pair production and decay at NLO matched with parton showers
• Simultaneous Explanation of the $R_K$ and $R_{D^{(\ast )}}$ Puzzles: a Model Analysis
• Leptoquark Flavor Patterns & B Decay Anomalies
• Maximal Flavour Violation: a Cabibbo mechanism for leptoquarks
• Lepton universality violation and lepton flavor conservation in $B$-meson decays
• Search for new physics in final states with an energetic jet or a hadronically decaying W or Z boson and transverse momentum imbalance at $\sqrt{s}=$ 13 TeV
• The RooStats Project
• Precise predictions for V+jets dark matter backgrounds
• Revisiting the vector leptoquark explanation of the B-physics anomalies
• Left-Right SU(4) Vector Leptoquark Model for Flavor Anomalies
• Combined Explanations of the $b\to s{\mu }^{+}{\mu }^{-}$ and $b\to c{\tau }^{-}\bar{\nu }$ Anomalies: a General Model Analysis
• Low-energy signatures of the ${\mathrm{PS}}^3$ model: from $B$-physics anomalies to LFV
• Combined explanations of B-physics anomalies: the sterile neutrino solution
• High-pT Signatures in Vector-Leptoquark Models
• Search for dark matter produced with an energetic jet or a hadronically decaying W or Z boson at sqrt(s) = 13 TeV
• B-decay anomalies in Pati-Salam SU(4)
• The Leptoquark Hunter's Guide: Large Coupling
• Leptoquark toolbox for precision collider studies
• Flavorful leptoquarks at hadron colliders
• W physics at the LHC with FEWZ 2.1
• Revisiting the new-physics interpretation of the $b\to c\tau \nu$ data
• $R_{D^{(\ast )}}$ 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
• Search for the Decay of the Higgs Boson to Charm Quarks with the ATLAS Experiment
• Search for heavy neutrinos and third-generation leptoquarks in hadronic states of two $\tau$ leptons and two jets in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Searches for third-generation scalar leptoquarks in $\sqrt{s}$ = 13 TeV pp collisions with the ATLAS detector
• Single Productions of Colored Particles at the LHC: An Example with Scalar Leptoquarks
• Search for singly and pair-produced leptoquarks coupling to third-generation fermions in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Les Houches 2013: Physics at TeV Colliders: New Physics Working Group Report
• A search for the standard model Higgs boson decaying to charm quarks
• Anticipating Non-Resonant New Physics in Dilepton Angular Spectra at the LHC
• Search for leptoquarks coupled to third-generation quarks in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Testing Leptoquark/EFT in $\bar{B}\to D^{(\ast )}l\bar{\nu }$ at the LHC
• Effective Theory Approach to New Physics with Flavour: General Framework and a Leptoquark Example
• Hunting scalar leptoquarks with boosted tops and light leptons
• Single Leptoquark Production at Hadron Colliders
• Search for a singly produced third-generation scalar leptoquark decaying to a $\tau$ lepton and a bottom quark in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for dark matter in events with energetic, hadronically decaying top quarks and missing transverse momentum at $\sqrt{s}=$ 13 TeV
• Search for pair production of scalar leptoquarks decaying into first- or second-generation leptons and top quarks in proton-proton collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Search for supersymmetry in final states with charm jets and missing transverse momentum in 13 TeV $pp$ collisions with the ATLAS detector
• Search for large missing transverse momentum in association with one top-quark in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Implications for Electric Dipole Moments of a Leptoquark Scenario for the $B$-Physics Anomalies
• Leptons in the Proton
• Boosting vector leptoquark searches with boosted tops
• A vector leptoquark for the B-physics anomalies from a composite GUT
• Searching for production of dark matter in association with top quarks at the LHC
• Searching for dark matter in final states with two jets and missing transverse energy

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• Reading the footprints of the B-meson flavor anomalies
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• Inclusive nonresonant multilepton probes of new phenomena at $\sqrt{s}=$ 13 TeV
• Precise limits on the charge-$2/3$ $U_1$ vector leptoquark
• Complete Lagrangian and Set of Feynman Rules for Scalar Leptoquarks
• Distinguishing signatures of scalar leptoquarks at hadron and muon colliders
• Improving third-generation leptoquark searches with combined signals and boosted top
• Phenomenology of Scalar Leptoquarks at the LHC in Explaining the Radiative Neutrino Mass, Muon $g-2$ and Lepton Flavour Violating Observables
• Flavorful leptoquarks at the LHC and beyond: Spin 1
• Resonant leptoquark at NLO with POWHEG
• On Drell-Yan production of scalar leptoquarks coupling to heavy-quark flavours
• Distinguishing Leptoquarks at the LHC/FCC
• Addendum to: Combined Constraints on First Generation Leptoquarks
• Drell-Yan production in third-generation gauge vector leptoquark models at NLO+PS in QCD
• Next-to-Leading-Order QCD Matching for $\Delta F=2$ Processes in Scalar Leptoquark Models
• Searching for pseudo Nambu-Goldstone boson dark matter production in association with top quarks
• Enhancement of the double Higgs production via leptoquarks at the LHC
• Third-Family Lepton-Quark Fusion
• Search for scalar leptoquarks produced via $\tau$-lepton-quark scattering in pp collisions at $\sqrt{s}$ = 13 TeV
• Photon and Leptons induced processes at the LHC
• Constraining Scalar Doublet and Triplet Leptoquarks with Vacuum Stability and Perturbativity