Boosting vector leptoquark searches with boosted tops

Abstract

At the LHC, a TeV-scale leptoquark (LQ) that decays dominantly to a top quark ($t$) and a light charged lepton ($\ell =e,\mu$) would form a resonance system of \emph{boosted-$t$ $+$ high-$p_{\mathrm{T}}$-$\ell$}. We consider all possible vector LQ models within the Buchmüller-Rückl-Wyler classifications with the desired decay. We propose simple phenomenological Lagrangians that are suitable for bottom-up/experimental studies and, at the same time, can cover the relevant parameter spaces of these models. In this simplified framework, we study the pair and single production channels of vector LQs at the LHC. Interestingly, we find that, like the pair production, the cross sections of some single production processes also depend on the parameter $\kappa$ that appears in the gluon-vector LQ coupling. We adopt a search strategy of selecting events with at least one boosted hadronic top quark and exactly two high-$p_{\mathrm{T}}$ leptons of the same flavor and opposite sign. This combines events from the pair and single production processes and, therefore, can enhance the discovery potential beyond that of the pair-production-only searches. For $5\sigma$ discovery we find that vector LQs can be probed up to $2.55$ TeV for $100\%$ branching ratio in the $t\ell$ decay mode and $\mathcal{O}(1)$ new couplings at the $14$ TeV LHC with $3$ ab${}^{-1}$ of integrated luminosity.

arXiv commentFollow-up paper of 1907.11194 [hep-ph]. Minor typos fixed. Matches with the journal version

References in corpus (104)

• 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
• 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
• Final Report of the Muon E821 Anomalous Magnetic Moment Measurement at BNL
• Parton distributions with LHC data
• UFO - The Universal FeynRules Output
• Better Jet Clustering Algorithms
• R-parity violating supersymmetry
• Test of lepton universality using $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• Evidence for an excess of B -> D(*) Tau Nu decays
• Vector boson pair production at the LHC
• Vector boson production at hadron colliders: a fully exclusive QCD calculation at NNLO
• 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 $\mathcal{B}({\overline{B}}^0\to D^{\ast +}{\tau }^{-}{\overline{\nu }}_{\tau })/\mathcal{B}({\overline{B}}^0\to D^{\ast +}{\mu }^{-}{\overline{\nu }}_{\mu })$
• Angular analysis of the $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ decay using $3\,\mbox{fb}^{-1}$ of integrated luminosity
• More Model-Independent Analysis of b->s Processes
• Measurement of the $\tau$ lepton polarization and $R(D^{\ast })$ in the decay $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$
• On the Standard Model predictions for $R_K$ and $R_{K^{\ast }}$
• Search for lepton-universality violation in $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• Differential branching fractions and isospin asymmetries of $B\to K^{(\ast )}{\mu }^{+}{\mu }^{-}$ decays
• Testing leptoquark models in $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$
• 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
• Test of Lepton Flavor Universality by the measurement of the $B^0\to D^{\ast -}{\tau }^{+}{\nu }_{\tau }$ branching fraction using three-prong $\tau$ decays
• Confronting lepton flavor universality violation in B decays with high-$p_T$ tau lepton searches at LHC
• Stop Reconstruction with Tagged Tops
• Measurement of the ratio of branching fractions $\mathcal{B}(B_c^{+}\to J/\psi {\tau }^{+}{\nu }_{\tau })$/$\mathcal{B}(B_c^{+}\to J/\psi {\mu }^{+}{\nu }_{\mu })$
• Combined analysis of semileptonic $B$ decays to $D$ and $D^{\ast }$: $R(D^{(\ast )})$, $|V_{cb}|$, and new physics
• Flavor models for $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$
• Closing the window on single leptoquark solutions to the $B$-physics anomalies
• Revisiting $B\to D\ell \nu$
• Baryon Number and Lepton Universality Violation in Leptoquark and Diquark Models
• $R(D^{\ast })$, $|V_{cb}|$, and the Heavy Quark Symmetry relations between form factors
• Measurement of the $\tau$ lepton polarization and $R(D^{\ast })$ in the decay $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$ with one-prong hadronic $\tau$ decays at Belle
• Importance of Loop Effects in Explaining the Accumulated Evidence for New Physics in B Decays with a Vector Leptoquark
• Extraction of $|V_{cb}|$ from $B\to D^{(\ast )}\ell {\nu }_{\ell }$ and the Standard Model predictions of $R(D^{(\ast )})$
• The Leptoquark Hunter's Guide: Pair Production
• Simultaneous Explanation of the $R_K$ and $R_{D^{(\ast )}}$ Puzzles: a Model Analysis
• Leptoquark Flavor Patterns & B Decay Anomalies
• Revisiting the vector leptoquark explanation of the B-physics anomalies
• Scalar leptoquarks and the rare B meson decays
• Towards a unified explanation of $R_{D^{(\ast )}}$, $R_K$ and $(g-2{)}_{\mu }$ anomalies in a left-right model with leptoquarks
• 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
• High-pT Signatures in Vector-Leptoquark Models
• Explaining the $R_K$ and $R_{D^{(\ast )}}$ anomalies with vector leptoquarks
• Constraints on scalar leptoquarks from lepton and kaon physics
• 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
• Lepton number violation at the LHC with leptoquark and diquark
• Associated production of a top quark pair with a heavy electroweak gauge boson at NLO+NNLL accuracy
• Anomalies in Bottom from new physics in Top
• $R_{D^{(\ast )}}$ motivated ${\mathcal{S}}_1$ leptoquark scenarios: Impact of interference on the exclusion limits from LHC data
• $D^{\ast }$ polarization vs. $R_{D^{(\ast )}}$ anomalies in the leptoquark models
• 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
• Addressing the ${\mathbf{R}}_{D^{(\ast )}}$ anomalies with an ${\mathbf{S}}_1$ leptoquark from $\mathbf{SO}(10)$ grand unification
• Constraints on models of scalar and vector leptoquarks decaying to a quark and a neutrino at $\sqrt{s}=$ 13 TeV
• QCD Improved Matching for Semi-Leptonic B Decays with Leptoquarks
• Searching for Leptoquarks at IceCube and the LHC
• Top Quark Pair Production beyond NNLO
• Study of the rare semileptonic decays $B_d^0\to K^{\ast }{l}^{+}{l}^{-}$ in scalar leptoquark model
• Search for third-generation scalar leptoquarks decaying to a top quark and a $\tau$ lepton at $\sqrt{s}=$ 13 TeV
• Search for leptoquarks coupled to third-generation quarks in proton-proton collisions 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
• Lepton flavour violating B meson decays via scalar leptoquark
• Correlation between $R_{D^{(\ast )}}$ and top quark FCNC decays in leptoquark models
• Measurement of the ratio of branching fractions $\mathcal{B}(B_c^{+}\to J/\psi K^{+})/\mathcal{B}(B_c^{+}\to J/\psi {\pi }^{+})$
• Revisiting scalar leptoquark at the LHC
• A chiral SU(4) explanation of the $b\to s$ anomalies
• Rare semileptonic $B\to K(\pi )l_i^{-}{l}_j^{+}$ decay in vector leptoquark model
• Indirect and monojet constraints on scalar leptoquarks
• Effects of scalar leptoquark on semileptonic ${\Lambda }_b$ decays
• New physics in $b\to s\ell \ell$ transitions at one loop
• Sensitivity of Future Hadron Colliders to Leptoquark Pair Production in the Di-Muon Di-Jets Channel
• Probing Color Octet Electrons at the LHC
• Effect of scalar leptoquarks on the rare decays of B_s meson
• Fermionic dark matter in leptoquark portal
• $B$-decay anomalies and scalar leptoquarks in unified Pati-Salam models from noncommutative geometry
• Constraints on Leptoquark Models from IceCube Data
• Collider signature of $U_1$ Leptoquark and constraints from $b\to c$ observables
• Leptoquark effects on $b\to s\nu \bar{\nu }$ and $B\to K{l}^{+}{l}^{-}$ decay processes
• Probing Leptoquark and Heavy Neutrino at LHeC
• Signatures of ${\tilde{R}}_2$ class of Leptoquarks at the upcoming $ep$ colliders
• Seeking leptoquarks in the $\mathbf{t}\bar{\mathbf{t}}$ plus missing energy channel at the high-luminosity LHC
• Leptoquark Pair Production at $ep$ Colliders
• $b\to c\ell \nu$ anomalies in light of extended scalar sectors
• Probing Compositeness with the CMS $eejj$ & $eej$ Data
• Probing sterile neutrinos in the framework of inverse seesaw mechanism through leptoquark productions
• Impact of vector leptoquark on $\bar{B}\to {\bar{K}}^{\ast }{l}^{+}{l}^{-}$ anomalies
• Phenomenology of TeV-scale scalar Leptoquarks in the EFT
• SO(10) grand unification in light of recent LHC searches and colored scalars at the TeV-scale
• Collider signature of $V_2$ Leptoquark with $b\to s$ flavour observables
• Scalar leptoquark effects on $B\to \mu \bar{\nu }$ decay
• Non-resonant Leptoquark with multigeneration couplings to $\mu \mu jj$ and $\mu \nu jj$ at LHC
• Probing leptoquark chirality via top polarization at the Colliders
• LHC probes of TeV-scale scalars in $\mathrm{SO}(10)$ grand unification
• Vacuum stability in an extended standard model with a leptoquark

Cited by in corpus (18)

• Lepton-quark collisions at the Large Hadron Collider
• Searching for Leptoquarks at Future Muon Colliders
• Unified explanation of flavor anomalies, radiative neutrino mass and ANITA anomalous events in a vector leptoquark model
• Combined explanation of $W$-mass, muon $g-2$, $R_{K^{(\ast )}}$ and $R_{D^{(\ast )}}$ anomalies in a singlet-triplet scalar leptoquark model
• Precise limits on the charge-$2/3$ $U_1$ vector leptoquark
• Resonant third-generation leptoquark signatures at the Large Hadron Collider
• 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
• Leptoquark-assisted Singlet-mediated Di-Higgs Production at the LHC
• Distinguishing Leptoquarks at the LHC/FCC
• Right-handed neutrino pair production via second-generation leptoquarks
• Search for the $Z^{\prime }$ boson decaying to a right-handed neutrino pair in leptophobic $\mathrm{U}(1)$ models
• Vector leptoquark contributions to lepton dipole moments
• Interplay of Traditional Methods and Machine Learning Algorithms for Tagging Boosted Objects
• Third-Family Lepton-Quark Fusion
• Constraining Scalar Doublet and Triplet Leptoquarks with Vacuum Stability and Perturbativity