Seeking leptoquarks in the $\mathbf{t}\bar{\mathbf{t}}$ plus missing energy channel at the high-luminosity LHC

Abstract

The $t\bar{t}$ plus missing energy channel is one of the most efficient to detect third-generation leptoquarks (LQs). It offers an important test to models which explain flavor anomalies in $B$ meson decays. We outline a search strategy in the channel, relying on tagging the tops and on observables constructed out of the tops, and we assess the reach on LQs of the future high-luminosity LHC program. We find that with 3 ab${}^{-1}$ a vector (scalar) LQ decaying 50% (100%) to top and neutrino can be excluded up to masses of 1.96 TeV (1.54 TeV). We also indicate several observables that, in case of a future discovery in the channel, can be used to distinguish a scalar LQ from a vector LQ. The implications of our findings to models addressing the recent flavor anomalies are finally discussed.

arXiv comment19 pages, 8 figures. Matches version to appear in Physical Review D

References in corpus (56)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• 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
• FastJet user manual
• UFO - The Universal FeynRules Output
• FeynRules - Feynman rules made easy
• Test of lepton universality using $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• Identifying Boosted Objects with N-subjettiness
• Evidence for an excess of B -> D(*) Tau Nu decays
• Test of lepton universality with $B^0\to K^{\ast 0}{\ell }^{+}{\ell }^{-}$ decays
• Measurement of an Excess of B -> D(*) Tau Nu Decays and Implications for Charged Higgs Bosons
• 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 $\mathcal{B}({\overline{B}}^0\to D^{\ast +}{\tau }^{-}{\overline{\nu }}_{\tau })/\mathcal{B}({\overline{B}}^0\to D^{\ast +}{\mu }^{-}{\overline{\nu }}_{\mu })$
• Parton distributions with QED corrections
• B-physics anomalies: a guide to combined explanations
• One Leptoquark to Rule Them All: A Minimal Explanation for $R_{D^{(\ast )}}$, $R_K$ and $(g-2{)}_{\mu }$
• Measurement of the $\tau$ lepton polarization and $R(D^{\ast })$ in the decay $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$
• N-Jettiness: An Inclusive Event Shape to Veto Jets
• 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
• Simultaneous Explanation of $R(D^{(\ast )})$ and $b\to s{\mu }^{+}{\mu }^{-}$: The Last Scalar Leptoquarks Standing
• Anomalies in $B$-decays and $U(2)$ flavour symmetry
• Vector leptoquark resolution of $R_K$ and $R_{D^{(\ast )}}$ puzzles
• Implications of lepton flavor universality violations in B decays
• Closing the window on single leptoquark solutions to the $B$-physics anomalies
• Leptoquark model to explain the $B$-physics anomalies, $R_K$ and $R_D$
• Delphes, a framework for fast simulation of a generic collider experiment
• High-$p_T$ dilepton tails and flavour physics
• Scalar leptoquarks from GUT to accommodate the $B$-physics anomalies
• Search for direct third-generation squark pair production in final states with missing transverse momentum and two b-jets in sqrt{s}=8 TeV pp collisions with the ATLAS detector
• The Leptoquark Hunter's Guide: Pair Production
• Lepton universality violation and lepton flavor conservation in $B$-meson decays
• Higgs characterisation at NLO in QCD: CP properties of the top-quark Yukawa interaction
• Reconsidering the One Leptoquark solution: flavor anomalies and neutrino mass
• What is the scale of new physics behind the $B$-flavour anomalies?
• Disentangling Higgs-Top Couplings in Associated Production
• Towards a unified explanation of $R_{D^{(\ast )}}$, $R_K$ and $(g-2{)}_{\mu }$ anomalies in a left-right model with leptoquarks
• Search for scalar leptoquarks in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS experiment
• Search for new phenomena with the MT2 variable in the all-hadronic final state produced in proton-proton collisions at sqrt(s) = 13 TeV
• Addressing the B-physics anomalies in a fundamental Composite Higgs Model
• A study of jet mass distributions with grooming
• Search for low mass vector resonances decaying into quark-antiquark pairs in proton-proton collisions at sqrt(s) = 13 TeV
• Leptoquark toolbox for precision collider studies
• Flavorful leptoquarks at hadron colliders
• Pair Production of Scalar Leptoquarks at the LHC to NLO Parton Shower Accuracy
• Search for the third-generation scalar leptoquarks and heavy right-handed neutrinos in final states with two tau leptons and two jets in proton-proton collisions at sqrt(s) = 13 TeV
• LHC constraints and prospects for $S_1$ scalar leptoquark explaining the $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$ anomaly
• Constraints on models of scalar and vector leptoquarks decaying to a quark and a neutrino at $\sqrt{s}=$ 13 TeV
• Search for third-generation scalar leptoquarks decaying to a top quark and a $\tau$ lepton 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
• Determining the CP nature of spin-0 mediators in associated production of dark matter and $t\bar{t}$ pairs
• Constraining the Strength and CP Structure of Dark Production at the LHC: the Associated Top-Pair Channel
• The Case for Future Hadron Colliders From $B\to K^{(\ast )}{\mu }^{+}{\mu }^{-}$ Decays
• Determining Spin through Quantum Azimuthal-Angle Correlations
• Naturalness of asymptotically safe Higgs

Cited by in corpus (13)

• $R_{D^{(\ast )}}$ motivated ${\mathcal{S}}_1$ leptoquark scenarios: Impact of interference on the exclusion limits from LHC data
• Unified explanation of flavor anomalies, radiative neutrino mass and ANITA anomalous events in a vector leptoquark model
• GUT Physics in the era of the LHC
• Hunting scalar leptoquarks with boosted tops and light leptons
• Precise limits on the charge-$2/3$ $U_1$ vector leptoquark
• Improving third-generation leptoquark searches with combined signals and boosted top
• Boosting vector leptoquark searches with boosted tops
• Collider signature of $U_1$ Leptoquark and constraints from $b\to c$ observables
• Signatures of ${\tilde{R}}_2$ class of Leptoquarks at the upcoming $ep$ colliders
• Precise probing and discrimination of third-generation scalar leptoquarks
• Sequentially loop supressed fermion masses from a unique discrete symmetry
• TeV-scale leptoquark searches at the LHC and their E${}_6$SSM Interpretation
• Probing the Tau Anomalous Magnetic Moment at Colliders: From Ultra-Peripheral Collisions to the Precision Frontier