Leptoquark Option for $B$-meson Anomalies and Leptonic Signatures

Abstract

We entertain the option of scalar leptoquarks to explain the anomalies in the semi-leptonic decays of $B$-mesons and the discrepancies in the lepton $(g-2{)}_l$'s including the recent results at Fermilab E989. The $R_{K^{(\ast )}}$ and $R_{D^{(\ast )}}$ anomalies can be accommodated by the specific couplings for triplet and singlet leptoquarks, respectively, subject to the bounds from $B\to K\nu \bar{\nu }$. We discuss the correlation between the leptonic signatures from leptoquarks such as $\mu \to e\gamma$ and the electric dipole moment of electron and show that desirable neutrino masses can be generated dominantly by top-quark loops in the extension of the model with several doublet leptoquarks.

22 pages, 5 figures. v2: updated with the recent data from Fermilab E989, references added, v3: improved discussion, v4: typos corrected, accepted version for Phys. Rev. D

References in corpus (25)

• Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm
• Test of lepton universality using $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• Measurement of the fine-structure constant as a test of the Standard Model
• B-physics anomalies: a guide to combined explanations
• On the B to D* tau nu Sensitivity to New Physics
• Search for lepton-universality violation in $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• Test of lepton universality in beauty-quark decays
• 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
• $R_K$ and future $b\to s\ell \ell$ BSM opportunities
• Confronting lepton flavor universality violation in B decays with high-$p_T$ tau lepton searches at LHC
• Simultaneous Explanation of the $R_K$ and $R(D^{(\ast )})$ Puzzles
• $R(D^{\ast })$, $|V_{cb}|$, and the Heavy Quark Symmetry relations between form factors
• Extraction of $|V_{cb}|$ from $B\to D^{(\ast )}\ell {\nu }_{\ell }$ and the Standard Model predictions of $R(D^{(\ast )})$
• Tenth-Order Electron Anomalous Magnetic Moment --- Contribution of Diagrams without Closed Lepton Loops
• On the single leptoquark solutions to the $B$-physics anomalies
• Leptoquark Flavor Patterns & B Decay Anomalies
• Reading the footprints of the B-meson flavor anomalies
• Constraint on the branching ratio of B_c \to tau nu from LEP1 and consequences for R(D(*)) anomaly
• A Model of Muon Anomalies
• Measurement of $\mathcal{R}(D)$ and $\mathcal{R}(D^{\ast })$ with a semileptonic tagging method
• A minimal flavored $U(1{)}^{\prime }$ for $B$-meson anomalies
• New Physics in Rare B Decays after Moriond 2021
• Leptoquarks facing flavour tests and $b\to s\ell \ell$ after Moriond 2021
• On the effective lifetime of $B_s\to \mu \mu \gamma$
• Study of Lepton Universality at Belle

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• Combined explanation of $W$-mass, muon $g-2$, $R_{K^{(\ast )}}$ and $R_{D^{(\ast )}}$ anomalies in a singlet-triplet scalar leptoquark model
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• New Physics in $b\to s\mu \mu$: FCC-hh or a Muon Collider?
• Distinguishing signatures of scalar leptoquarks at hadron and muon colliders
• 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
• Phenomenology of Scalar Leptoquarks at the LHC in Explaining the Radiative Neutrino Mass, Muon $g-2$ and Lepton Flavour Violating Observables
• Combined explanations of $B$-physics anomalies, $(g-2{)}_{e,\mu }$ and neutrino masses by scalar leptoquarks
• Integrating out heavy scalars with modified EOMs: matching computation of dimension-eight SMEFT coefficients
• Seesaw lepton masses and muon $g-2$ from heavy vector-like leptons
• Multi-lepton probes of new physics and lepton-universality in top-quark interactions
• The landscape of promising non-supersymmetric string models
• Flavour alignment of New Physics in light of the $(g-2{)}_{\mu }$ anomaly
• Scotogenic Dirac neutrino mass models embedded with leptoquarks: one pathway to address the flavor anomalies and the neutrino masses together
• Shedding light on dark matter with recent muon $(g-2)$ and Higgs exotic decay measurements
• Lepton flavour violation in rare ${\Lambda }_b$ decays
• The Muon Magnetic Moment and Physics Beyond the Standard Model
• 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
• Hunting Nonstandard Neutrino Interactions and Leptoquarks in Dark Matter Experiments
• Generic tests of CP-violation in high-$p_{\text{T}}$ multi-lepton signals at the LHC and beyond
• Searching for new physics from SMEFT and leptoquarks at the P2 experiment
• Discriminating 1D new physics solutions in $b\to s\ell \ell$ decays
• Constraining Scalar Doublet and Triplet Leptoquarks with Vacuum Stability and Perturbativity
• Explaining the hints for lepton flavour universality violation with three $S_2$ leptoquark generations