Reconsidering the One Leptoquark solution: flavor anomalies and neutrino mass

Abstract

We reconsider a model introducing a scalar leptoquark $\varphi \sim (3,1,-1/3)$ to explain recent deviations from the standard model in semileptonic $B$ decays. The leptoquark can accommodate the persistent tension in the decays $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$ as long as its mass is lower than approximately $10\text{ TeV}$, and we show that a sizeable Yukawa coupling to the right-chiral tau lepton is necessary for an acceptable explanation. Agreement with the measured $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$ rates is mildly compromised for parameter choices addressing the tensions in $b\to s\mu \mu$, where the model can significantly reduce the discrepancies in angular observables, branching ratios and the lepton-flavor-universality observables $R_K$ and $R_{K^{\ast }}$. The leptoquark can also reconcile the predicted and measured value of the anomalous magnetic moment of the muon and appears naturally in models of radiative neutrino mass derived from lepton-number violating effective operators. As a representative example, we incorporate the particle into an existing two-loop neutrino mass scenario derived from a dimension-nine operator. In this specific model, the structure of the neutrino mass matrix provides enough freedom to explain the small masses of the neutrinos in the region of parameter space dictated by agreement with the anomalies in $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$, but not the $b\to s$ transition. This is achieved without excessive fine-tuning in the parameters important for neutrino mass.

43 pages, 17 figures, 3 tables; corrected fit contours in fig. 12

References in corpus (23)

• Updated fit to three neutrino mixing: exploring the accelerator-reactor complementarity
• Measurement of the $\tau$ lepton polarization and $R(D^{\ast })$ in the decay $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$
• 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
• Angular Distributions of B -> K ll Decays
• Simultaneous Explanation of $R(D^{(\ast )})$ and $b\to s{\mu }^{+}{\mu }^{-}$: The Last Scalar Leptoquarks Standing
• Study of the decay K+ => pi+,nu,nubar in the momentum region 140<Ppi<199 MeV/c
• Flavour anomalies after the $R_{K^{\ast }}$ measurement
• Lepton Flavor Violation in B Decays?
• $SU(2)\times U(1)$ gauge invariance and the shape of new physics in rare $B$ decays
• On the impact of power corrections in the prediction of B->K*mu+mu- observables
• Hint of Lepton Flavour Non-Universality in $B$ Meson Decays
• New strategies for New Physics search in B -> K* nu anti-nu, B -> K nu anti-nu and B -> X(s) nu anti-nu decays
• Phenomenology of an $SU(2)\times SU(2)\times U(1)$ model with lepton-flavour non-universality
• Diagnosing lepton-nonuniversality in $b\to s\ell \ell$
• A leptoquark model to accommodate $R_K^{\exp }<R_K^{\mathrm{SM}}$ and $R_{K^{\ast }}^{\exp }<R_{K^{\ast }}^{\mathrm{SM}}$
• pi/K -> e nu branching ratios to O(e^2 p^4) in Chiral Perturbation Theory
• On the Importance of Electroweak Corrections for B Anomalies
• Global fits to b -> s ll data and signs for lepton non-universality
• Lepton-flavor universality violation in $R_K$ and $R_{D^{(\ast )}}$ from warped space
• Consequences of R-Parity violating interactions for anomalies in $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$ and $b\to s{\mu }^{+}{\mu }^{-}$
• Measurement of the form factors of the decay B0 -> D*- ell+ nu and determination of the CKM matrix element |Vcb|
• Testing Radiative Neutrino Mass Models at the LHC
• A Three-loop Neutrino Model with Leptoquark Triplet Scalars

Cited by in corpus (113)

• B-physics anomalies: a guide to combined explanations
• From the trees to the forest: a review of radiative neutrino mass models
• Gauge leptoquark as the origin of B-physics anomalies
• Closing the window on single leptoquark solutions to the $B$-physics anomalies
• On the single leptoquark solutions to the $B$-physics anomalies
• Maximal Flavour Violation: a Cabibbo mechanism for leptoquarks
• New Physics in $b\to s{\ell }^{+}{\ell }^{-}$ confronts new data on Lepton Universality
• The Mono-Tau Menace: From $B$ Decays to High-$p_T$ Tails
• Global fit to $b\to c\tau \nu$ transitions
• Impact of polarization observables and $B_c\to \tau \nu$ on new physics explanations of the $b\to c\tau \nu$ anomaly
• Pati-Salam explanations of the B-meson anomalies
• Combined explanations of B-physics anomalies: the sterile neutrino solution
• Constraining new physics in $b\to c\ell \nu$ transitions
• Addressing the B-physics anomalies in a fundamental Composite Higgs Model
• Low-energy phenomenology of scalar leptoquarks at one-loop accuracy
• The Neutrino Magnetic Moment Portal: Cosmology, Astrophysics, and Direct Detection
• Constraints on scalar leptoquarks from lepton and kaon physics
• Generic Loop Effects of New Scalars and Fermions in $b\to s{\ell }^{+}{\ell }^{-}$, $(g-2{)}_{\mu }$ and a Vector-like $4^{\mathrm{th}}$ Generation
• Getting chirality right: single scalar leptoquark solutions to the $(g-2{)}_{e,\mu }$ puzzle
• 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
• Unified Framework for $B$-Anomalies, Muon $g-2$, and Neutrino Masses
• $D^{\ast }$ polarization vs. $R_{D^{(\ast )}}$ anomalies in the leptoquark models
• $U(1{)}_{B_3-3L_{\mu }}$ gauge symmetry as a simple description of $b\to s$ anomalies
• Correlating $h\to {\mu }^{+}{\mu }^{-}$ to the Anomalous Magnetic Moment of the Muon via Leptoquarks
• $B$ decay anomalies and dark matter from vectorlike confinement
• Combined explanations of $(g-2{)}_{\mu }$, $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ anomalies in a two-loop radiative neutrino mass model
• A near-minimal leptoquark model for reconciling flavour anomalies and generating radiative neutrino masses
• $R_2$ as a single leptoquark solution to $R_{D^{(\ast )}}$ and $R_{K^{(\ast )}}$
• Addressing the ${\mathbf{R}}_{D^{(\ast )}}$ anomalies with an ${\mathbf{S}}_1$ leptoquark from $\mathbf{SO}(10)$ grand unification
• QCD Improved Matching for Semi-Leptonic B Decays with Leptoquarks
• Combined Constraints on First Generation Leptoquarks
• Implications of scalar and tensor explanations of $R_{D^{(\ast )}}$
• Searching for Leptoquarks at IceCube and the LHC
• Scalar Leptoquarks in Leptonic Processes
• Correlating Lepton Flavour (Universality) Violation in $B$ Decays with $\mu \to e\gamma$ using Leptoquarks
• A Minimal Explanation of Flavour Anomalies: B-Meson Decays, Muon Magnetic Moment, and the Cabibbo Angle
• Revisiting R-parity violating interactions as an explanation of the B-physics anomalies
• $R_{K^{(\ast )}}$ and related $b\to s\ell \bar{\ell }$ anomalies in minimal flavor violation framework with $Z^{\prime }$ boson
• Unified explanation of flavor anomalies, radiative neutrino mass and ANITA anomalous events in a vector leptoquark model
• Footprints of leptoquarks: from $R_{K^{(\ast )}}$ to $K\to \pi \nu \bar{\nu }$
• A Common Origin of Neutrino Masses and $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ Anomalies
• Charged current $b\to c\tau {\bar{\nu }}_{\tau }$ anomalies in a general $W^{\prime }$ boson scenario
• Investigation of Effects of New Physics in ${\Lambda }_b\to {\Lambda }_c\tau {\bar{\nu }}_{\tau }$ Decay
• Impact of ${\Lambda }_b\to {\Lambda }_c\tau \nu$ measurement on New Physics in $b\to cl\nu$ transitions
• Constraints on charmphilic solutions to the muon g-2 with leptoquarks
• Correlation between $R_{D^{(\ast )}}$ and top quark FCNC decays in leptoquark models
• Unified SU(4) theory for the $R_{D^{(\ast )}}$ and $R_{K^{(\ast )}}$ anomalies
• Combined explanation of $W$-mass, muon $g-2$, $R_{K^{(\ast )}}$ and $R_{D^{(\ast )}}$ anomalies in a singlet-triplet scalar leptoquark model
• Scrutinizing $R$-parity violating interactions in light of $R_{K^{(\ast )}}$ data
• Radiative neutrino masses, lepton flavor mixing and muon $g-2$ in a leptoquark model
• Leptoquark Option for $B$-meson Anomalies and Leptonic Signatures
• Leptoquarks in Oblique Corrections and Higgs Signal Strength: Status and Prospects
• Flavor Non-universality Gauge Interactions and Anomalies in B-Meson Decays
• Leptoquark manoeuvres in the dark: a simultaneous solution of the dark matter problem and the $R_{D^{(\ast )}}$ anomalies
• $R(K^{(\ast )})$ from dark matter exchange
• Seeking leptoquarks in IceCube
• $R_K$ and $R_{K^{\ast }}$ in an Aligned 2HDM with Right-Handed Neutrinos
• Exploding operators for Majorana neutrino masses and beyond
• Reconciling $B$-decay anomalies with neutrino masses, dark matter and constraints from flavour violation
• Complete Lagrangian and Set of Feynman Rules for Scalar Leptoquarks
• $R_{K^{(\ast )}}^{\nu }$ and non-standard neutrino interactions
• Phenomenology of $b\to c\tau \bar{\nu }$ decays in a scalar leptoquark model
• A nonunitary interpretation for a single vector leptoquark combined explanation to the $B$-decay anomalies
• R-parity violating solutions to the $R_{D^{(\ast )}}$ anomaly and their GUT-scale unifications
• B-physics anomalies: The bridge between R-parity violating Supersymmetry and flavoured Dark Matter
• New physics in $b\to s\ell \ell$ transitions at one loop
• Testing Minimal Flavor Violation in Leptoquark Models of the $R_{K^{(\ast )}}$ Anomaly
• The Forward-Backward Asymmetry in $B\to D^{\ast }\ell \nu$: One more hint for Scalar Leptoquarks?
• Explanations for anomalies of muon anomalous magnetic dipole moment, $b\to s\mu \bar{\mu }$ and radiative neutrino masses in a leptoquark model
• A gauged horizontal $SU(2)$ symmetry and $R_{K^{(\ast )}}$
• $B$-decay anomalies and scalar leptoquarks in unified Pati-Salam models from noncommutative geometry
• Dark matter for $b\to s{\mu }^{+}{\mu }^{-}$ anomaly in a gauged $U(1{)}_X$ model
• Leptoquark-vectorlike quark model for the CDF $m_W$, $(g-2{)}_{\mu }$, $R_{K^{(\ast )}}$ anomalies and neutrino mass
• A model for the Singlet-Triplet Leptoquarks
• Gravitational Wave Signatures of Lepton Universality Violation
• Direct determination of Wilson coefficients using $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ decays
• A Complete Framework for Tau Polarimetry in $B\to D^{(\ast )}\tau \nu$ Decays
• Seeking leptoquarks in the $\mathbf{t}\bar{\mathbf{t}}$ plus missing energy channel at the high-luminosity LHC
• Minimal Radiative Neutrino Masses
• Anomalies in B mesons decays: A phenomenological approach
• The landscape of promising non-supersymmetric string models
• Implications of the $R_K$ and $R_{K^{\ast }}$ anomalies
• Constraints on leptoquarks from lepton-flavour-violating tau-lepton processes
• Marriage between neutrino mass and flavor anomalies
• Addendum to: Combined Constraints on First Generation Leptoquarks
• Exploring leptoquark effects in hyperon and kaon decays with missing energy
• Next-to-Leading-Order QCD Matching for $\Delta F=2$ Processes in Scalar Leptoquark Models
• Search for rare decays of $D^0$ mesons into two muons
• Neutrinoless Double Beta Decay from Scalar Leptoquarks: Interplay with Neutrino Mass and Flavor Physics
• Scalar leptoquark effects on $B\to \mu \bar{\nu }$ decay
• Muon $(g-2)$ and Flavor Puzzles in the $U(1{)}_X^{}$-gauged Leptoquark Model
• The Muon Magnetic Moment and Physics Beyond the Standard Model
• 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
• $b\to c\tau \bar{\nu }$ decays in supersymmetry with $R$-parity violation
• Enhancement of the double Higgs production via leptoquarks at the LHC
• The fate of $V_1$ vector leptoquarks: the impact of future flavour data
• Lowering the scale of Pati-Salam breaking through seesaw mixing
• Gravitational wave signals from leptoquark-induced first order electroweak phase transitions
• Probing New Physics in light of recent developments in $b\to c\ell \nu$ transitions
• Relations between $b\to c\tau \nu$ Decay Modes in Scalar Models
• Searching for new physics from SMEFT and leptoquarks at the P2 experiment
• TeV-scale leptoquark searches at the LHC and their E${}_6$SSM Interpretation
• Flavour anomalies meet flavour symmetry
• Perturbative unitarity constraints on generic Yukawa interactions
• Rare decay $t\to c\gamma \gamma$ via scalar leptoquark doublets
• TeV-scale scalar leptoquarks motivated by B anomalies improve Yukawa unification in SO(10) GUT
• Novel Leptoquark Pair Production at LHC
• Rare b-hadron decays as probe of new physics
• Neutron decay into a Dark Sector via Leptoquarks
• Quark and lepton flavor model with leptoquarks in a modular $A_4$ symmetry
• Explaining the hints for lepton flavour universality violation with three $S_2$ leptoquark generations
• Constraining the new contributions to electron $g-2$ in a radiative neutrino mass model