The Leptoquark Hunter's Guide: Large Coupling

Abstract

Leptoquarks have recently received much attention especially because they may provide an explanation to the $R_{D^{(\ast )}}$ and $R_{K^{(\ast )}}$ anomalies in rare $B$ meson decays. In a previous paper we proposed a systematic search strategy for all possible leptoquark flavors by focusing on leptoquark pair production. In this paper, we extend this strategy to large (order unity) leptoquark couplings which offer new search opportunities: single leptoquark production and $t$-channel leptoquark exchange with dilepton final states. We discuss the unique features of the different search channels and show that they cover complementary regions of parameter space. We collect and update all currently available bounds for the different flavor final states from LHC searches and from atomic parity violation measurements. As an application of our analysis, we find that current limits do not exclude the leptoquark explanation of the $B$ physics anomalies but that the high luminosity run of the LHC will reach the most interesting parameter space.

33 pages + references, 15 figures, 9 tables, v2: references added

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Cited by in corpus (73)

• On the single leptoquark solutions to the $B$-physics anomalies
• Reading the footprints of the B-meson flavor anomalies
• Revisiting the vector leptoquark explanation of the B-physics anomalies
• Rare $b$ decays meet high-mass Drell-Yan
• Low-energy phenomenology of scalar leptoquarks at one-loop accuracy
• Searches for additional Higgs bosons and for vector leptoquarks in $\tau \tau$ final states in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Lepton-quark collisions at the Large Hadron Collider
• Charm Physics Confronts High-$p_T$ Lepton Tails
• Combined explanations of $(g-2{)}_{\mu }$, $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ anomalies in a two-loop radiative neutrino mass model
• $R_2$ as a single leptoquark solution to $R_{D^{(\ast )}}$ and $R_{K^{(\ast )}}$
• Searching for Leptoquarks at Future Muon Colliders
• QCD Improved Matching for Semi-Leptonic B Decays with Leptoquarks
• Combined Constraints on First Generation Leptoquarks
• Scalar Leptoquarks in Leptonic Processes
• First-Generation New Physics in Simplified Models: From Low-Energy Parity Violation to the LHC
• Parton distributions in the SMEFT from high-energy Drell-Yan tails
• Effective Theory Approach to New Physics with Flavour: General Framework and a Leptoquark Example
• Hunting scalar leptoquarks with boosted tops and light leptons
• GUT Physics in the era of the LHC
• A Common Origin of Neutrino Masses and $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ Anomalies
• Simplified Models of Flavourful Leptoquarks
• Constraints on charmphilic solutions to the muon g-2 with leptoquarks
• Leptoquarks in Oblique Corrections and Higgs Signal Strength: Status and Prospects
• Indirect and monojet constraints on scalar leptoquarks
• Resonant third-generation leptoquark signatures at the Large Hadron Collider
• Adding Flavor to the SMEFT
• Leptons in the Proton
• New Physics in $b\to s\mu \mu$: FCC-hh or a Muon Collider?
• The Dark Side of 4321
• Finite Family Groups for Fermionic and Leptoquark Mixing Patterns
• Resonant leptoquark at NLO with POWHEG
• On Drell-Yan production of scalar leptoquarks coupling to heavy-quark flavours
• Phenomenology of TeV-scale scalar Leptoquarks in the EFT
• A comparative study of the $S_1$ and $U_1$ leptoquark effects in the light quark regime
• Origin of Yukawa couplings for Higgs and leptoquarks
• One colorful resolution to the neutrino mass generation, three lepton flavor universality anomalies, and the Cabibbo angle anomaly
• Marriage between neutrino mass and flavor anomalies
• Constraints on leptoquarks from lepton-flavour-violating tau-lepton processes
• Fresh look at the LHC limits on scalar leptoquarks
• Scalar leptoquarks at the LHC and flavour anomalies: a comparison of pair-production modes at NLO-QCD
• Drell-Yan production in third-generation gauge vector leptoquark models at NLO+PS in QCD
• Addendum to: Combined Constraints on First Generation Leptoquarks
• Next-to-Leading-Order QCD Matching for $\Delta F=2$ Processes in Scalar Leptoquark Models
• Lepton flavour violation in rare ${\Lambda }_b$ decays
• Muon $(g-2)$ and Flavor Puzzles in the $U(1{)}_X^{}$-gauged Leptoquark Model
• Sequentially loop supressed fermion masses from a unique discrete symmetry
• Scalar leptoquark effects on $B\to \mu \bar{\nu }$ decay
• Leptoquark search at the Forward Physics Facility
• Flavor changing neutral current decays $t\to cX$ ($X=\gamma ,g,Z,H$) and $t\to c\bar{\ell }\ell$ ($\ell =\mu ,\tau$) via scalar leptoquarks
• Quark masses, CKM angles and Lepton Flavour Universality violation
• Search for a third-generation leptoquark coupled to a $\tau$ lepton and a b quark through single, pair, and nonresonant production in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Non-resonant Leptoquark with multigeneration couplings to $\mu \mu jj$ and $\mu \nu jj$ at LHC
• Asymmetric Leptoquark Pair Production at LHC
• Uncovering a chirally suppressed mechanism of $0\nu \beta \beta$ decay with LHC searches
• Constraining New Physics with Single Top production at LHC
• A neutrino window to scalar leptoquarks: from low energy to colliders
• Enhancement of the double Higgs production via leptoquarks at the LHC
• Breaking Mirror Twin Color
• Simplified models of vector $SU(4)$ leptoquarks at the TeV
• Hunting Nonstandard Neutrino Interactions and Leptoquarks in Dark Matter Experiments
• Search for charged-lepton-flavour violating $\mu \tau qt$ interactions in top-quark production and decay in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector at the LHC
• Third-Family Lepton-Quark Fusion
• Search for leptoquark pair production decaying into $t{e}^{-}\bar{t}{e}^{+}$ or $t{\mu }^{-}\bar{t}{\mu }^{+}$ in multi-lepton final states in $pp$ collisions at 13 TeV with the ATLAS detector
• Searching and identifying leptoquarks through low-energy polarized scattering processes $e^{-}p\to e^{-}{\Lambda }_c$
• Confronting $B$ anomalies with low energy parity violation
• 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
• Novel Leptoquark Pair Production at LHC
• Rare decay $t\to c\gamma \gamma$ via scalar leptoquark doublets
• Probing new physics at the LHC with $\mathrm{b}\tau \nu$ final states
• Exploring mixed lepton-quark interactions in non-resonant leptoquark production at the LHC
• Constraining Scalar Doublet and Triplet Leptoquarks with Vacuum Stability and Perturbativity
• Explaining lepton-flavor non-universality and self-interacting dark matter with $L_{\mu }-L_{\tau }$