Physics of leptoquarks in precision experiments and at particle colliders

Abstract

We present a comprehensive review of physics effects generated by leptoquarks (LQs), i.e., hypothetical particles that can turn quarks into leptons and vice versa, of either scalar or vector nature. These considerations include discussion of possible completions of the Standard Model that contain LQ fields. The main focus of the review is on those LQ scenarios that are not problematic with regard to proton stability. We accordingly concentrate on the phenomenology of light leptoquarks that is relevant for precision experiments and particle colliders. Important constraints on LQ interactions with matter are derived from precision low-energy observables such as electric dipole moments, (g-2) of charged leptons, atomic parity violation, neutral meson mixing, Kaon, B, and D meson decays, etc. We provide a general analysis of indirect constraints on the strength of LQ interactions with the quarks and leptons to make statements that are as model independent as possible. We address complementary constraints that originate from electroweak precision measurements, top, and Higgs physics. The Higgs physics analysis we present covers not only the most recent but also expected results from the Large Hadron Collider (LHC). We finally discuss direct LQ searches. Current experimental situation is summarized and self-consistency of assumptions that go into existing accelerator-based searches is discussed. A progress in making next-to-leading order predictions for both pair and single LQ productions at colliders is also outlined.

136 pages, 22 figures, typographical errors fixed, the Physics Reports version

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• Search for third generation scalar leptoquarks decaying into tau b
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• Search for Second Generation Leptoquark Pairs in pbar-p Collisions at sqrt(s) = 1.8 TeV
• Search for Second and Third Generation Leptoquarks Including Production via Technicolor Interactions in $p\bar{p}$ collisions at $\sqrt{s}=1.8$ TeV
• Fermionic decays of scalar leptoquarks and scalar gluons in the minimal four color symmetry model
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• Don't Stop Thinking About Leptoquarks: Constructing New Models
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• Coloron-assisted Leptoquarks at the LHC
• Vector Leptoquark Pair Production in $e^{+}{e}^{-}$ Annihilation
• Search for Second Generation Leptoquark Pairs Decaying to μν+ jets in p-pbar Collisions at sqrt{s} = 1.8 TeV
• Search for scalar leptoquarks in the acoplanar jet topology in ppbar collisions at sqrt(s)=1.96 TeV
• Transverse beam polarization and limits on leptoquark couplings in e+e- --> t tbar
• Leptoquark Production in Electron-Photon Scattering
• Leptoquark Mass Limits from Single Leptoquark Production at LEP and LEP200
• Signatures of Leptoquarks at the LHC and Right-handed Neutrinos
• How large can the branching ratio of $B_s\to {\tau }^{+}{\tau }^{-}$ be ?
• Single Leptoquark Production at TeV Energy $\gamma p$ Colliders
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• Two-loop neutrino masses with large R-parity violating interactions in supersymmetry
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• Signals for Virtual Leptoquark Exchange at HERA
• Signal and Backgrounds for the Single Production of Scalar and Vector Leptoquarks at the LHC
• Leptoquark Search at $e^{+}{e}^{-}$ Colliders
• Of Contact Interactions and Colliders
• Sneutrino Higgs models explain lepton non-universality in CMS excesses
• Signals for Vector Leptoquarks in Hadronic Collisions
• What Can We Learn About Leptoquarks At LEP200?
• Prospects for Scalar Leptoquark Discovery at the LHC
• An Overview of the COMET Experiment and its Recent Progress
• A low-energy compatible SU(4)-type Model for Vector Leptoquarks of Mass <= 1 TeV
• Leptoquark Contribution to the Higgs Boson Production at the LHC Collider
• Lepton Flavour Violating tau and mu decays induced by scalar leptoquark
• Search for Scalar Leptoquark Pairs Decaying to $\nu \bar{\nu }q\bar{q}$ in \ppbar Collisions at $\sqrt{s}=1.96$ TeV
• Search for single production of scalar leptoquarks in p\bar{p} collisions decaying into muons and quarks with the D0 detector
• Constraints on Leptoquark Masses and Couplings from Rare Processes and Unification
• Naturally Light Leptoquarks
• Search for Single Leptoquark and Squark Production in Electron-Photon Scattering at sqrt(s_ee) = 189 GeV at LEP
• Leptoquark signal from global analysis
• The Neutrino Magnetic Moment Induced by Leptoquarks
• Search for pair-produced leptoquarks in e+e- interactions at sqrt(s) = 183 GeV
• Production of Two Non-Conjugate Leptoquarks in $e^{-}{e}^{-}$ Collisions
• Leptoquarks and vector-like strong interactions at the TeV scale
• HERA Data and Leptoquarks in Supersymmetry
• Supersymmetric interpretation of high--$Q^2$ HERA events and other related issues
• Leptoquark pair production at the Fermilab Tevatron: Signal and backgrounds
• Searches for Scalar and Vector Leptoquarks at Future Hadron Colliders
• Atomic parity violation and the HERA anomaly
• Minimal Flavour Violation and Neutrino Masses without R-parity
• Explaining the HERA Anomaly Without Giving Up R-parity Conservation
• Vector Leptoquark Production at Hadron Colliders
• Leptoquark explanation of HERA anomaly in the context of gauge unification
• Single Production of Leptoquarks at the Tevatron
• Signal and Backgrounds for Leptoquarks at the LHC II: Vector Leptoquarks
• Search for Leptoquarks
• Impact on SUSY-Breaking Models of the $R$-Parity Violating Squark Interpretation of the HERA Anomaly
• Leptoquarks in SUSY Unified Models and the HERA Events
• Scalar Leptoquark Pair Production at the CERN LHC: Signal and Backgrounds
• Exotic leptoquarks from superstring derived models
• Single leptoquark production at high-energy e+ e- colliders
• Leptoquark Pair Production Cross Sections at Hadron Colliders
• Removing flavor changing neutral interactions from leptoquark exchange
• Indirect Leptoquark Searches at Polarized Lepton Colliders
• Flavor Violation in the Scalar Sector
• R-parity violation and the New Events at HERA
• A Scenario for Contact Interactions at HERA
• A New Method Of Distinguishing Models For The High-$Q^2$ Events At HERA
• Could we learn more about HERA high Q^2 anomaly from LEP200 and TEVATRON ?

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• Excesses of muon $g-2$, $R_{D^{(\ast )}}$, and $R_K$ in a leptoquark model
• Revisiting the vector leptoquark explanation of the B-physics anomalies
• Towards a unified explanation of $R_{D^{(\ast )}}$, $R_K$ and $(g-2{)}_{\mu }$ anomalies in a left-right model with leptoquarks
• Pati-Salam explanations of the B-meson anomalies
• A leptoquark model to accommodate $R_K^{\exp }<R_K^{\mathrm{SM}}$ and $R_{K^{\ast }}^{\exp }<R_{K^{\ast }}^{\mathrm{SM}}$
• Matching scalar leptoquarks to the SMEFT at one loop
• $(g-2{)}_{\mu }$, Lepton Flavour Violation and $Z$ Decays with Leptoquarks: Correlations and Future Prospects
• EFT approach to the electron Electric Dipole Moment at the two-loop level
• Rare $b$ decays meet high-mass Drell-Yan
• One constraint to kill them all?
• Addressing the B-physics anomalies in a fundamental Composite Higgs Model
• Explaining the $R_K$ and $R_{D^{(\ast )}}$ anomalies with vector leptoquarks
• The Neutrino Magnetic Moment Portal: Cosmology, Astrophysics, and Direct Detection
• Constraints on scalar leptoquarks from lepton and kaon physics
• One Leptoquark to unify them? Neutrino masses and unification in the light of $(g-2{)}_{\mu }$, $R_{D^{(\star )}}$ and $R_K$ anomalies
• The role of the $S_3$ GUT leptoquark in flavor universality and collider searches
• The phenomenology of electric dipole moments in models of scalar leptoquarks
• The Leptoquark Hunter's Guide: Large Coupling
• Muon $g-2$ and scalar leptoquark mixing
• Leptoquark toolbox for precision collider studies
• New physics solutions for $R_D$ and $R_{D^{\ast }}$
• Flavorful leptoquarks at hadron colliders
• Interpreting the Electron EDM Constraint
• Revisiting $B\to K^{(\ast )}\nu \bar{\nu }$ decays in the Standard Model and beyond
• FlavBit: A GAMBIT module for computing flavour observables and likelihoods
• Getting chirality right: single scalar leptoquark solutions to the $(g-2{)}_{e,\mu }$ puzzle
• A $L_{\mu }-L_{\tau }$ theory of Higgs flavor violation and $(g-2{)}_{\mu }$
• 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
• Leptoquark mechanism of neutrino masses within the grand unification framework
• Penguin $b\to s{\ell }^{\prime +}{\ell }^{\prime -}$ and $B$-meson anomalies in a gauged $L_{\mu }-L_{\tau }$
• Drell-Yan Tails Beyond the Standard Model
• A closer look at the $R_D$ and $R_{D^{\ast }}$ anomalies
• New Physics in the Visible Final States of $B\to D^{(\ast )}\tau \nu$
• Anomalies in Bottom from new physics in Top
• A Challenge to Lepton Universality in B Meson Decays
• D* polarization as a probe to discriminate new physics in B --> D* tau nubar
• Novel angular dependence in Drell-Yan lepton production via dimension-8 operators
• Effective field theory interpretation of lepton magnetic and electric dipole moments
• 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
• Sterile neutrinos and neutrinoless double beta decay in effective field theory
• $R(D^{(\ast )})$ from $W^{\prime }$ and right-handed neutrinos
• Unified Framework for $B$-Anomalies, Muon $g-2$, and Neutrino Masses
• $D^{\ast }$ polarization vs. $R_{D^{(\ast )}}$ anomalies in the leptoquark models
• Lepton-quark collisions at the Large Hadron Collider
• Hunting leptoquarks in monolepton searches
• A Model of Muon Anomalies
• Precision predictions for scalar leptoquark pair-production at hadron colliders
• Implications for New Physics in $b\to s\mu \mu$ transitions after recent measurements by Belle and LHCb
• $B$ decay anomalies and dark matter from vectorlike confinement
• Leptoquarks meet ${\epsilon }^{\prime }/\epsilon$ and rare Kaon processes
• Combined explanations of $(g-2{)}_{\mu }$, $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ anomalies in a two-loop radiative neutrino mass model
• Long-lived Sterile Neutrinos at the LHC in Effective Field Theory
• Massive vectors and loop observables: the $g-2$ case
• Probing low energy scalar leptoquarks by the leptonic $W$ and $Z$ couplings
• Electric Dipole Moments from CP-Violating Scalar Leptoquark Interactions
• Snowmass White Paper: Beyond the Standard Model effects on Neutrino Flavor
• Neutrino mixing and $R_K$ anomaly in $U(1{)}_X$ models: a bottom-up approach
• Discrepancies in simultaneous explanation of Flavor Anomalies and IceCube PeV Events using Leptoquarks
• Search for singly and pair-produced leptoquarks coupling to third-generation fermions in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• $\mu \to e\gamma$ selecting scalar leptoquark solutions for the $(g-2{)}_{e,\mu }$ puzzles
• A near-minimal leptoquark model for reconciling flavour anomalies and generating radiative neutrino masses
• Searching for Leptoquarks at Future Muon Colliders
• Flavor Constraints from Unitarity and Analyticity
• QCD Improved Matching for Semi-Leptonic B Decays with Leptoquarks
• Combined Constraints on First Generation Leptoquarks
• Searching for Leptoquarks at IceCube and the LHC
• Implications of scalar and tensor explanations of $R_{D^{(\ast )}}$
• HighPT: A Tool for high-$p_T$ Drell-Yan Tails Beyond the Standard Model
• 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
• Correlating Lepton Flavour (Universality) Violation in $B$ Decays with $\mu \to e\gamma$ using Leptoquarks
• $B_s\to {\mu }^{+}{\mu }^{-}$ as current and future probe of new physics
• On lepton flavour universality in semileptonic $B_c\to {\eta }_c,J/\psi$ decays
• Proton decay into charged leptons
• Search for leptoquarks coupled to third-generation quarks in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Understanding the first measurement of $\mathcal{B}(B\to K\nu \bar{\nu })$
• Search for pair production of first-generation scalar leptoquarks at $\sqrt{s}=$ 13 TeV
• Toward a coherent solution of diphoton and flavor anomalies
• Effective Field Theory after a New-Physics Discovery
• 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
• General neutrino interactions with sterile neutrinos in light of coherent neutrino-nucleus scattering and meson invisible decays
• Muonic Force Behind Flavor Anomalies
• Right-handed Neutrinos and $R(D^{(\ast )})$
• New physics in $B$ meson mixing: future sensitivity and limitations
• Explanation of $B\to K^{(\ast )}{\ell }^{+}{\ell }^{-}$ and muon $g-2$, and implications at the LHC
• Heavy neutral leptons in effective field theory and the high-luminosity LHC
• ${\Lambda }_b\to {\Lambda }_c\tau {\bar{\nu }}_{\tau }$ decay in scalar and vector leptoquark scenarios
• Footprints of leptoquarks: from $R_{K^{(\ast )}}$ to $K\to \pi \nu \bar{\nu }$
• EFT at FASER$\nu$
• A Common Origin of Neutrino Masses and $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ Anomalies
• Anomalies in Particle Physics
• New Physics Opportunities for Long-Lived Particles at Electron-Proton Colliders
• Asymmetry Observables and the Origin of $R_{D^{(\ast )}}$ Anomalies
• SU(5) Unification with TeV-scale Leptoquarks
• Leptoquarks and Matter Unification: Flavor Anomalies and the Muon $g-2$
• Investigation of Effects of New Physics in ${\Lambda }_b\to {\Lambda }_c\tau {\bar{\nu }}_{\tau }$ Decay
• Revisit to the $b\to c\tau \nu$ transition: in and beyond the SM
• Rare radiative charm decays within the standard model and beyond
• Impact of ${\Lambda }_b\to {\Lambda }_c\tau \nu$ measurement on New Physics in $b\to cl\nu$ transitions
• When Energy Goes Missing: New Physics in $b\to s\nu \nu$ with Sterile Neutrinos
• Simplified Models of Flavourful Leptoquarks
• $B$ meson anomalies and large $B^{+}\to K^{+}\nu \bar{\nu }$ in non-universal $U(1{)}^{\prime }$ models
• Neutrino non-standard interactions meet precision measurements of $N_{\mathrm{eff}}$
• Semileptonic tau decays beyond the Standard Model
• 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
• Correlation between $R_{D^{(\ast )}}$ and top quark FCNC decays in leptoquark models
• Digamma, what next?
• Combined explanation of $W$-mass, muon $g-2$, $R_{K^{(\ast )}}$ and $R_{D^{(\ast )}}$ anomalies in a singlet-triplet scalar leptoquark model
• Enhancing Scalar Productions with Leptoquarks at the LHC
• Hadronic Uncertainties versus New Physics for the $W$ boson Mass and Muon $g-2$ Anomalies
• Impact of $B\to K\nu \bar{\nu }$ measurements on beyond the Standard Model theories
• Revisiting scalar leptoquark at the LHC
• Precise limits on the charge-$2/3$ $U_1$ vector leptoquark
• Towards testing the magnetic moment of the tau at one part per million
• Interpreting the 750 GeV digamma excess: a review
• Radiative neutrino masses, lepton flavor mixing and muon $g-2$ in a leptoquark model
• Leptoquark Option for $B$-meson Anomalies and Leptonic Signatures
• Unraveling the $0\nu \beta \beta$ Decay Mechanisms
• Leptoquarks in Oblique Corrections and Higgs Signal Strength: Status and Prospects
• Testing Lepton Flavor Universality with Pion, Kaon, Tau, and Beta Decays
• Probing the $R_{K^{(\ast )}}$ Anomaly at a Muon Collider
• Lepto-Quark Portal Dark Matter
• The Case for Future Hadron Colliders From $B\to K^{(\ast )}{\mu }^{+}{\mu }^{-}$ Decays
• Seeking leptoquarks in IceCube
• Long-lived Sterile Neutrinos at Belle II in Effective Field Theory
• Reconciling $B$-decay anomalies with neutrino masses, dark matter and constraints from flavour violation
• Leptoquark solution for both the flavor and ANITA anomalies
• Rare semileptonic $B\to K(\pi )l_i^{-}{l}_j^{+}$ decay in vector leptoquark model
• Complete Lagrangian and Set of Feynman Rules for Scalar Leptoquarks
• Das ist der HAMMER: Consistent new physics interpretations of semileptonic decays
• Exploding operators for Majorana neutrino masses and beyond
• Reconciling dark matter, $R_{K^{(\ast )}}$ anomalies and $(g-2{)}_{\mu }$ in an $L_{\mu }-L_{\tau }$ scenario
• Indirect and monojet constraints on scalar leptoquarks
• Resonant third-generation leptoquark signatures at the Large Hadron Collider
• Implications for Electric Dipole Moments of a Leptoquark Scenario for the $B$-Physics Anomalies
• Vector leptoquark mass limits and branching ratios of $K_L^0,B^0,B_s\to l_i^{+}{l}_j^{-}$ decays with account of fermion mixing in leptoquark currents
• Phenomenology of $b\to c\tau \bar{\nu }$ decays in a scalar leptoquark model
• Leptons in the Proton
• A nonunitary interpretation for a single vector leptoquark combined explanation to the $B$-decay anomalies
• New Physics in $b\to s\mu \mu$: FCC-hh or a Muon Collider?
• Distinguishing signatures of scalar leptoquarks at hadron and muon colliders
• Interplay of New Physics Effects in $(g-2{)}_{\ell }$ and $h\to {\ell }^{+}{\ell }^{-}$ -- Lessons from SMEFT
• Constraining flavour patterns of scalar leptoquarks in the effective field theory
• Improving third-generation leptoquark searches with combined signals and boosted top
• Exploring dark matter, neutrino mass and $R_{K^{(\ast )},\varphi }$ anomalies in $L_{\mu }-L_{\tau }$ model
• R-parity violating solutions to the $R_{D^{(\ast )}}$ anomaly and their GUT-scale unifications
• A testable radiative neutrino mass model without additional symmetries and Explanation for the $b\to s{\ell }^{+}{\ell }^{-}$ anomaly
• New physics in $b\to s\ell \ell$ transitions at one loop
• Flavor anomalies from asymptotically safe gravity
• Sensitivity of Future Hadron Colliders to Leptoquark Pair Production in the Di-Muon Di-Jets Channel
• Leptonic anomalous magnetic moments in $\nu$SMEFT
• ${\rm Y}$ and $\psi$ leptonic decays as probes of solutions to the $R_D^{(\ast )}$ puzzle
• On the Minimal Flavor Violating Leptoquark Explanation of the $R_{D^{(\ast )}}$ Anomaly
• Reflecting on chirality: CP-violating extensions of the single scalar-leptoquark solutions for the $(g-2{)}_{e,\mu }$ puzzles and their implications for lepton EDMs
• Unification of Gauge Couplings in Radiative Neutrino Mass Models
• Effective field theory approach to lepton number violating decays $K^{\pm }\to {\pi }^{\mp }{l}^{\pm }{l}^{\pm }$: short-distance contribution
• Light particles with baryon and lepton numbers
• Electric dipole moment of ${}^{199}$Hg atom from P, CP-odd electron-nucleon interaction
• Coloured Scalar Mediated Nucleon Decays to Invisible Fermion
• Pseudo-Nambu-Goldstone Dark Matter Model Inspired by Grand Unification
• Boosting vector leptoquark searches with boosted tops
• From B-meson anomalies to Kaon physics with scalar leptoquarks
• Contributions to $b\to s\ell \ell$ Anomalies from $R$-Parity Violating Interactions
• CP asymmetry in $\tau \to K_S\pi {\nu }_{\tau }$ decays within the Standard Model and beyond
• A gauged horizontal $SU(2)$ symmetry and $R_{K^{(\ast )}}$
• Scalar Leptoquarks, Baryon Number Violation and Pati-Salam Symmetry
• Universal Scalar Leptoquark Action for Matching
• $B$-decay anomalies and scalar leptoquarks in unified Pati-Salam models from noncommutative geometry
• Anomalies and accidental symmetries: charging the scalar leptoquark under $L_{\mu }$-$L_{\tau }$
• $\Delta L=3$ processes: Proton decay and LHC
• Leptoquark-vectorlike quark model for the CDF $m_W$, $(g-2{)}_{\mu }$, $R_{K^{(\ast )}}$ anomalies and neutrino mass
• A leptoquark and vector-like quark extended model for the simultaneous explanation of the $W$ boson mass and muon $g-2$ anomalies
• On $(g-2{)}_{\mu }$ From Gauged $\mathrm{U}(1{)}_X$
• $B\to \rho l\bar{\nu }$ and $\omega l\bar{\nu }$ in and beyond the Standard Model: Improved predictions and $|V_{ub}|$
• Reinterpretation of searches for long-lived particles from meson decays
• Collider phenomenology of a unified leptoquark model
• Collider signature of $U_1$ Leptoquark and constraints from $b\to c$ observables
• A model for the Singlet-Triplet Leptoquarks
• Reach and complementarity of $\mu \to e$ searches
• What is the scale of new physics behind the muon $g-2$?
• Phenomenology of Scalar Leptoquarks at the LHC in Explaining the Radiative Neutrino Mass, Muon $g-2$ and Lepton Flavour Violating Observables
• Search for the decay $D^0\to {\pi }^0\nu \bar{\nu }$
• Effective Operator Bases for Beyond Standard Model Scenarios: An EFT compendium for discoveries
• A vector leptoquark for the B-physics anomalies from a composite GUT
• New flavor physics in di- and tri-lepton events from single-top at the LHC and beyond
• Long-lived neutral fermions at the DUNE near detector
• Signatures of ${\tilde{R}}_2$ class of Leptoquarks at the upcoming $ep$ colliders
• Probing Leptoquark and Heavy Neutrino at LHeC
• Coherent $\mu -e$ Conversion at Next-to-Leading Order
• New Physics effects in charm meson decays involving $c\to u{l}^{+}{l}^{-}(l_i^{\mp }{l}_j^{\pm })$ transitions
• Coloured Scalars Mediated Rare Charm Meson Decays to Invisible Fermions
• $B$ anomalies under the lens of electroweak precision
• Seeking leptoquarks in the $\mathbf{t}\bar{\mathbf{t}}$ plus missing energy channel at the high-luminosity LHC
• Effective theory tower for $\mu \to e$ conversion
• Simultaneous interpretation of $K$ and $B$ anomalies in terms of chiral-flavorful vectors
• Combined explanations of $B$-physics anomalies, $(g-2{)}_{e,\mu }$ and neutrino masses by scalar leptoquarks
• Flavorful leptoquarks at the LHC and beyond: Spin 1
• Finite Family Groups for Fermionic and Leptoquark Mixing Patterns
• $b\to c\ell \nu$ anomalies in light of extended scalar sectors
• SO(10): a Case for Hadron Colliders
• Neutrino mass models: New classification and model-independent upper limits on their scale
• Scalar leptoquark pair production at the LHC: precision predictions in the era of flavour anomalies
• Impact of vector leptoquark on $\bar{B}\to {\bar{K}}^{\ast }{l}^{+}{l}^{-}$ anomalies
• Simplified leptoquark models for precision $l_i\to l_f\gamma$ experiments: two-loop structure of $O({\alpha }_S{Y}^2)$ corrections
• Indirect constraints on lepton-flavour-violating quarkonium decays
• Probing sterile neutrinos in the framework of inverse seesaw mechanism through leptoquark productions
• Charged-lepton-flavor violation in $|\Delta S|=1$ hyperon decays
• Light dark matter, rare $B$ decays with missing energy in $L_{\mu }-L_{\tau }$ model with a scalar leptoquark
• Prospects for $B_c^{+}$ and $B^{+}\to {\tau }^{+}{\nu }_{\tau }$ at FCC-ee
• Effective comparison of neutrino-mass models
• Multi-lepton probes of new physics and lepton-universality in top-quark interactions
• Leptoquark-assisted Singlet-mediated Di-Higgs Production at the LHC
• The landscape of promising non-supersymmetric string models
• Study of the rare decays $B_{s,d}^{\ast }\to {\mu }^{+}{\mu }^{-}$
• Sterile neutrinos with non-standard interactions in $\beta$- and $0\nu \beta \beta$-decay experiments
• Resonant leptoquark at NLO with POWHEG
• On Drell-Yan production of scalar leptoquarks coupling to heavy-quark flavours
• A comparative study of the $S_1$ and $U_1$ leptoquark effects in the light quark regime
• Constraints on subleading interactions in beta decay Lagrangian
• Phenomenology of TeV-scale scalar Leptoquarks in the EFT
• Constraining rare B decays by ${\mu }^{+}{\mu }^{-}\to tc$ at future lepton colliders
• Origin of Yukawa couplings for Higgs and leptoquarks
• Lepton Flavour Violation in minimal grand-unified type II seesaw models
• DUNE potential as a New Physics probe
• Scotogenic Dirac neutrino mass models embedded with leptoquarks: one pathway to address the flavor anomalies and the neutrino masses together
• Constraints on leptoquarks from lepton-flavour-violating tau-lepton processes
• Signatures of complex new physics in $b\to c\tau \bar{\nu }$ transitions
• Marriage between neutrino mass and flavor anomalies
• Right-handed neutrino pair production via second-generation leptoquarks
• Implications of a Electroweak Triplet Scalar Leptoquark on the Ultra-High Energy Neutrino Events at IceCube
• Fresh look at the LHC limits on scalar leptoquarks
• The Rumble in the Meson: a leptoquark versus a $Z^{\prime }$ to fit $b\to s{\mu }^{+}{\mu }^{-}$ anomalies including 2022 LHCb $R_{K^{(\ast )}}$ measurements
• On Lepton Flavor Universality in Top Quark Decays
• Distinguishing Leptoquarks at the LHC/FCC
• One colorful resolution to the neutrino mass generation, three lepton flavor universality anomalies, and the Cabibbo angle anomaly
• Composite Higgs and leptoquarks from a simple group
• B Anomalies and Leptoquarks at the LHC: Beyond the Lepton-Quark Final State
• Right-handed interactions in puzzling $B$-decays
• Flavor Physics at the CEPC: a General Perspective
• Addendum to: Combined Constraints on First Generation Leptoquarks
• Exploring leptoquark effects in hyperon and kaon decays with missing energy
• Displaced Neutrino Jets at the LHeC
• Accidental scale-invariant Majorana dark matter in leptoquark-Higgs portals
• Scalar leptoquarks at the LHC and flavour anomalies: a comparison of pair-production modes at NLO-QCD
• Precise probing and discrimination of third-generation scalar leptoquarks
• Next-to-Leading-Order QCD Matching for $\Delta F=2$ Processes in Scalar Leptoquark Models
• Exploring charm decays with missing energy in leptoquark models
• Search for dark matter in events with a leptoquark and missing transverse momentum in proton-proton collisions at 13 TeV
• Revisiting mono-$\tau$ tails at the LHC
• Search for rare decays of $D^0$ mesons into two muons
• The Techni-Pati-Salam Composite Higgs
• Leptoquarks and Real Singlets: A Richer Scalar Sector Behind the Origin of Dark Matter
• Dirac Masses and Mixings in the (geo)SM(EFT) and Beyond
• A composite pNGB leptoquark at the LHC
• Constraining scalar leptoquarks using COHERENT data
• Light sterile neutrinos and lepton-number-violating kaon decays in effective field theory
• Determinations of form factors for semileptonic $D\to K$ decays and leptoquark constraints
• Leptoquarks: 750 GeV Diphoton Resonance and IceCube Events
• Phenomenology of SU(5) low-energy realizations: the diphoton excess and Higgs flavor violation
• Relativistic calculations of $R(D^{(\ast )})$, $R(D_s^{(\ast )})$, $R({\eta }_c)$ and $R(J/\psi )$
• General Remarks on the One-loop Contributions to the Muon Anomalous Magnetic Moment
• Investigating the Production of Leptoquarks by Means of Zeros of Amplitude at Photon Electron Collider
• Muon $(g-2)$ and Flavor Puzzles in the $U(1{)}_X^{}$-gauged Leptoquark Model
• The Muon Magnetic Moment and Physics Beyond the Standard Model
• Neutrinoless Double Beta Decay from Scalar Leptoquarks: Interplay with Neutrino Mass and Flavor Physics
• Sequentially loop supressed fermion masses from a unique discrete symmetry
• Anatomy of scalar mediated proton decays in $SO(10)$ models
• Dark Matter abundance via thermal decays and leptoquark mediators
• Scalar leptoquark effects on $B\to \mu \bar{\nu }$ decay
• $b\to c\tau \bar{\nu }$ decays in supersymmetry with $R$-parity 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
• Constraining New Physics with Single Top production at LHC
• Asymmetric Leptoquark Pair Production at LHC
• 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
• Non-resonant Leptoquark with multigeneration couplings to $\mu \mu jj$ and $\mu \nu jj$ at LHC
• Uncovering a chirally suppressed mechanism of $0\nu \beta \beta$ decay with LHC searches
• Test of lepton flavour universality with $B_s^0\to \varphi {\ell }^{+}{\ell }^{-}$ decays
• Interference Resurrection of the $\tau$ Dipole through Quantum Tomography
• $B-L$ violating nucleon decays as a probe of leptoquarks and implications for baryogenesis
• FCNC charmed-hadron decays with invisible singlet particles in light of recent data
• A neutrino window to scalar leptoquarks: from low energy to colliders
• Flavor physics in SU(5) GUT with scalar fields in the 45 representation
• High Scale Type-II Seesaw, Dominant Double Beta Decay within Cosmological Bound and Verifiable LFV Decays in SU(5)
• Enhancement of the double Higgs production via leptoquarks at the LHC
• Leptoquark and vector-like quark extended models as the explanation of the muon $g-2$ anomaly
• A Large Muon EDM from Dark Matter
• Time-delayed electrons from neutral currents at the LHC
• The fate of $V_1$ vector leptoquarks: the impact of future flavour data
• Search for leptoquarks decaying into the b$\tau$ final state in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Anomalous and axial Z' contributions to g-2
• A Challenge to Lepton Universality in B Meson Decays
• All possible first signals of gauge leptoquark in quark-lepton unification and beyond
• $K\to {\mu }^{+}{\mu }^{-}$ beyond the standard model
• Leptoquark-induced CLFV decays with a light SM-singlet scalar
• Leptoquarks, axions and the unification of B, L, and Peccei-Quinn symmetries
• Gravitational wave signals from leptoquark-induced first order electroweak phase transitions
• Model-independent analysis on $R(K^{(\ast )})$
• Probing Quark-Lepton Unification with Leptoquark and Higgs Decays
• Evading the Landau pole in the minimal 3-3-1 model with leptoquarks
• Decay dynamics of $N\to \ell \pi$ and $N\to \ell \gamma$
• Muon $g-2$ and semileptonic $B$ decays in Bélanger-Delaunay-Westhoff model with gauge kinetic mixing
• ${\tau }_{B_s}/{\tau }_{B_d}$ and $\Delta {\Gamma }_s$ confront new physics in $b\to s\tau \tau$
• Radiative neutrino mass model from a mass dimension-11 $\Delta L=2$ effective operator
• Vector leptoquark contributions to lepton dipole moments
• Probing leptoquark chirality via top polarization at the Colliders
• Measurement of the branching fraction ratio $R_K$ at large dilepton invariant mass
• Phenomenology of Colored Radiative Neutrino Mass Model and Its Implications on the Cosmic-ray Observations
• Direct production of SM-singlet scalars at the muon collider
• Rare B-Meson Decays at the Crossroads
• Exotic colored scalars at the LHC
• Mutually elusive: vectorlike antileptons and leptoquarks
• Revisiting the Scalar Leptoquark ($S_1$) Model with the Updated Leptonic Constraints
• Neutrino Mass, Coupling Unification, Verifiable Proton Decay, Vacuum Stability and WIMP Dark Matter in SU(5)
• No-go limitations on UV completions of the Neutrino Option
• A $\nu$ window onto leptoquarks?
• Reconstructing Effective Lagrangians Embedding Residual Family Symmetries
• Chiral gauge leptoquark mass limits and branching ratios of $K_L^0,B^0,B_s\to l_i^{+}{l}_j^{-}$ decays with account of the general fermion mixing in leptoquark currents
• On the EFT validity for Drell-Yan tails at the LHC
• Spectrum of colour sextet scalars in realistic SO(10) GUT
• The Revival of $U(1{)}_{L_e-L_{\mu }}$: A Natural Solution for $(g-2{)}_{\mu }$ with a Sub-GeV Dark Matter
• On the sensitivity of the D parameter to new physics
• Rare decays of b hadrons
• Hunting Nonstandard Neutrino Interactions and Leptoquarks in Dark Matter Experiments
• Search for pair production of scalar and vector leptoquarks decaying to muons and bottom quarks in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Prospects for discovering new physics in charm sector through low-energy scattering processes $e^{-}p\to e^{-}({\mu }^{-}){\Lambda }_c$
• Correlating $0\nu \beta \beta$ decays and flavor observables in leptoquark models
• Electric dipole moment of the neutron in Two Higgs Doublet Models with flavor changing
• Jet Substructure Probe on Scalar Leptoquark Models via Top Polarization
• Scalar leptoquark and vector-like quark extended models as the explanation of the muon $g-2$ anomaly: bottom partner chiral enhancement case
• Establishing the Isolated Standard Model
• 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
• Impact of $b\to c$ measurements on ${\Lambda }_b\to p\tau \bar{\nu }$ decay in $U_1$ leptoquark model
• Vector leptoquark $U_3$ and CP violation at T2K, NOvA experiments
• An Imperative study of the angular observables in ${\Lambda }_b\to {\Lambda }_c^{+}(\to \Lambda {\pi }^{+}){\ell }^{-}{\bar{\nu }}_{\ell }$ decay and probing the footprint of new physics
• $\Delta S=2$ nonleptonic hyperon decays as probes of new physics
• Dirac leptogenesis from asymmetry wash-in via scatterings
• Searching and identifying leptoquarks through low-energy polarized scattering processes $e^{-}p\to e^{-}{\Lambda }_c$
• New physics in $b\to s{e}^{+}{e}^{-}$: A model independent analysis
• Search for $t$-channel scalar and vector leptoquark exchange in the high-mass dimuon and dielectron spectra in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Nonperturbative effects in neutrino magnetic moments
• Flavor phenomenology of an extended 2HDM with inverse seesaw mechanism
• Searching for new physics from SMEFT and leptoquarks at the P2 experiment
• Lepton Flavor Violating $B\to K_2^{\ast }(1430){\mu }^{\pm }{\tau }^{\mp }$ Decays
• Flavour anomalies meet flavour symmetry
• $R(K^{(\ast )})$ with vector unparticles
• Theory status and implications of $R_K^{(\ast )}$
• Reappraisal of the minimal flavoured $Z^{\prime }$ scenario
• 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
• Dark Matter EFT, the Third -- Neutrino WIMPs
• CP Asymmetry in $\tau \to K\pi {\nu }_{\tau }$ within Non-Minimal $SU(5)$
• Searching for exclusive leptoquarks with the Nambu-Jona-Lasinio composite model at the LHC and HL-LHC
• Charting the new physics through one-loop effects in the muon magnetic dipole moment
• Improved Bounds and Global Fit of Flavor-Violating Charged Lepton Yukawa Couplings post LHC
• Probing $\Delta L=2$ lepton number violating SMEFT operators at the same-sign muon collider
• Search for the rare decay D${}^0$ $\to$ ${\mu }^{+}{\mu }^{-}$ in proton-proton collisions at $\sqrt{s}$ = 13.6 TeV
• On the Model Dependence of Fiducial Cross Section Measurements in View of Reinterpretations
• Effects of vector leptoquarks on ${\Lambda }_b\to {\Lambda }_c\ell {\overline{\nu }}_{\ell }$ decay
• TeV-scale scalar leptoquarks motivated by B anomalies improve Yukawa unification in SO(10) GUT
• Search for R-Parity-Violation-Induced Charged Lepton Flavor Violation at Future Lepton Colliders
• Rare b-hadron decays as probe of new physics
• Long-Lived HNLs via ALP Portal at the LHC
• Search for Low-Mass Leptoquarks using the $llqq$ final states in Pb-Pb Ultra-Peripheral Collisions
• Testing the $R_{D^{(\ast )}}$ Anomaly at the LHeC
• Leptoquark and vectorlike quark extended models as the explanation of $(g-2{)}_{\mu }$ anomaly
• Neutron decay into a Dark Sector via Leptoquarks
• Novel Leptoquark Pair Production at LHC
• Prospects for $B_c^{+}\to {\tau }^{+}{\nu }_{\tau }$ at FCC-ee
• Triple-leptoquark interactions for tree- and loop-level proton decays
• The Forward Physics Facility at the High-Luminosity LHC
• Pati-Salam and lepton universality in B decays
• Single Leptoquark Solutions to the $B$-physics Anomalies
• The Neutrinoless Double Beta Decay in the Colored Zee-Babu Model
• A measurement of the high-mass $\tau \bar{\tau }$ production cross-section at $\sqrt{s}=13$ TeV with the ATLAS detector and constraints on new particles and couplings
• Rare decay $t\to c\gamma \gamma$ via scalar leptoquark doublets
• Renormalization-group-improved constraints on dimension-7 baryon-number-violating operators
• Explaining the hints for lepton flavour universality violation with three $S_2$ leptoquark generations
• Flavor Anomalies and Quark-Lepton Unification
• Could electron-top interactions spoil the measurement of the Higgs trilinear? -A quantitative estimate at future lepton colliders-
• Impact of dim-6 $\nu$SMEFT operators on low-scale leptogenesis
• Probes of flavour symmetry and violation with top quarks in ATLAS and CMS
• Scalar leptoquark contributions to the $gg\to Zh$ process
• Direct searches motivated by recent $B$-anomalies
• Leveraging intermediate resonances to probe CP violation at colliders
• Constraining scalars of $16_H$ through proton decays in non-renormalisable $SO(10)$ models
• Theoretical implications of recent heavy flavour measurements at the LHC
• Scalar-induced Neutrinoless Double Beta Decay in $SU(5)$
• Lepton flavor violating top quark FCNC processes at the $\mu$TRISTAN
• Violation of lepton number in 3 units
• Revisiting $\mathrm{SU}(5)$ Yukawa Sectors Through Quantum Corrections
• Leptoquarks with Exactly Stable Protons
• Uncovering an Axion Mechanism with the EDM Portfolio
• Constraining Scalar Doublet and Triplet Leptoquarks with Vacuum Stability and Perturbativity
• Explaining lepton-flavor non-universality and self-interacting dark matter with $L_{\mu }-L_{\tau }$
• Vacuum stability in an extended standard model with a leptoquark
• Leptoquarks in B-meson anomalies: simplified models and HL-LHC discovery prospects
• GUT origins of general electroweak multiplets and their oblique parameters