On the single leptoquark solutions to the $B$-physics anomalies

Abstract

We revisit the possibilities of accommodating the experimental indications of the lepton flavor universality violation in $b$-hadron decays in the minimal scenarios in which the Standard Model is extended by the presence of a single $\mathcal{O}(1\mathrm{TeV})$ leptoquark state. To do so we combine the most recent low energy flavor physics constraints, including $R_{K^{(\ast )}}^{\exp }$ and $R_{D^{(\ast )}}^{\exp }$, and combine them with the bounds on the leptoquark masses and their couplings to quarks and leptons as inferred from the direct searches at the LHC and the studies of the large $p_T$ tails of the $pp\to \ell \ell$ differential cross section. We find that none of the scalar leptoquarks of $m_{\mathrm{LQ}}\simeq 1÷2$ TeV can accommodate the $B$-anomalies alone. Only the vector leptoquark, known as $U_1$, can provide a viable solution which, in the minimal setup, provides an interesting prediction, i.e. a lower bound to the lepton flavor violating $b\to s{\mu }^{\pm }{\tau }^{\mp }$ decay modes, such as $\mathcal{B}(B\to K\mu \tau )\gtrsim 0.7\times 10^{-7}$.

12 pages, 5 figures (10 plots) [v2: references added, Fig. 3 improved]

References in corpus (17)

• B-physics anomalies: a guide to combined explanations
• Test of lepton universality in beauty-quark decays
• $R_K$ 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
• Gauge leptoquark as the origin of B-physics anomalies
• The lifetime of the $B_c^{-}$ meson and the anomalies in $B\to D^{(\ast )}\tau \nu$
• Baryon Number and Lepton Universality Violation in Leptoquark and Diquark Models
• The Leptoquark Hunter's Guide: Pair Production
• Leptoquark Flavor Patterns & B Decay Anomalies
• Lepton universality violation and lepton flavor conservation in $B$-meson decays
• High-pT Signatures in Vector-Leptoquark Models
• The role of the $S_3$ GUT leptoquark in flavor universality and collider searches
• Lessons from the $B^{0,+}\to K^{\ast 0,+}{\mu }^{+}{\mu }^{-}$ angular analyses
• A search for the decay modes B+/- to h+/- tau l
• Probing low energy scalar leptoquarks by the leptonic $W$ and $Z$ couplings
• Measurement of $\mathcal{R}(D)$ and $\mathcal{R}(D^{\ast })$ with a semileptonic tagging method
• Investigation of Effects of New Physics in ${\Lambda }_b\to {\Lambda }_c\tau {\bar{\nu }}_{\tau }$ Decay

Cited by in corpus (96)

• Reading the footprints of the B-meson flavor anomalies
• Implications of new evidence for lepton-universality violation in $b\to s{\ell }^{+}{\ell }^{-}$ decays
• Tests of lepton universality using $B^0\to K_S^0{\ell }^{+}{\ell }^{-}$ and $B^{+}\to K^{\ast +}{\ell }^{+}{\ell }^{-}$ decays
• Revisiting $B\to K^{(\ast )}\nu \bar{\nu }$ decays in the Standard Model and beyond
• Drell-Yan Tails Beyond the Standard Model
• $B$ Flavour Anomalies: 2021 Theoretical Status Report
• Searches for additional Higgs bosons and for vector leptoquarks in $\tau \tau$ final states in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Muon $g-2$ and $B$-anomalies from Dark Matter
• A Minimal Explanation of Flavour Anomalies: B-Meson Decays, Muon Magnetic Moment, and the Cabibbo Angle
• Understanding the first measurement of $\mathcal{B}(B\to K\nu \bar{\nu })$
• Unveiling Hidden Physics at the LHC
• Muonic Force Behind Flavor Anomalies
• Leptoquarks and Matter Unification: Flavor Anomalies and the Muon $g-2$
• Confronting the vector leptoquark hypothesis with new low- and high-energy data
• Semileptonic tau decays beyond the Standard Model
• Iso-doublet Vector Leptoquark solution to the Muon $g-2$, $R_{K,K^{\ast }}$, $R_{D,D^{\ast }}$, and $W$-mass Anomalies
• Leptoquark Option for $B$-meson Anomalies and Leptonic Signatures
• Probing the $R_{K^{(\ast )}}$ Anomaly at a Muon Collider
• Leptoquark manoeuvres in the dark: a simultaneous solution of the dark matter problem and the $R_{D^{(\ast )}}$ anomalies
• New Physics in Rare B Decays after Moriond 2021
• New Physics in $b\to s\mu \mu$: FCC-hh or a Muon Collider?
• $B$-anomalies in a twin Pati-Salam theory of flavour including the 2022 LHCb $R_{K^{(\ast )}}$ analysis
• Improving third-generation leptoquark searches with combined signals and boosted top
• Non-resonant new physics search at the LHC for the $b\to c\tau \nu$ anomalies
• 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
• The Forward-Backward Asymmetry in $B\to D^{\ast }\ell \nu$: One more hint for Scalar Leptoquarks?
• Universal Scalar Leptoquark Action for Matching
• Hints of Natural Supersymmetry in Flavor Anomalies?
• Prospects for searches of $b\to s\nu \bar{\nu }$ decays at FCC-ee
• Leptoquark-vectorlike quark model for the CDF $m_W$, $(g-2{)}_{\mu }$, $R_{K^{(\ast )}}$ anomalies and neutrino mass
• Twin Pati-Salam theory of flavour with a TeV scale vector leptoquark
• On $(g-2{)}_{\mu }$ From Gauged $\mathrm{U}(1{)}_X$
• Studying the $b\to s{\ell }^{+}{\ell }^{-}$ anomalies and $(g-2{)}_{\mu }$ in $R$-parity violating MSSM framework with the inverse seesaw mechanism
• Searching for heavy leptoquarks at a muon collider
• Phenomenology of Scalar Leptoquarks at the LHC in Explaining the Radiative Neutrino Mass, Muon $g-2$ and Lepton Flavour Violating Observables
• A bridge to new physics: proposing new -- and reviving old -- explanations of $a_{\mu }$
• A global analysis of $b\to s\ell \ell$ data in heavy and light $Z^{\prime }$ models
• New physics in $B\to K^{\ast }{\tau }^{+}{\tau }^{-}$: A model independent analysis
• Scalar leptoquark pair production at the LHC: precision predictions in the era of flavour anomalies
• $CP$ violation in $b\to s\ell \ell$: a model independent analysis
• Effective comparison of neutrino-mass models
• The landscape of promising non-supersymmetric string models
• Collider Signatures of Coannihilating Dark Matter in Light of the B-Physics Anomalies
• Search for the lepton flavour violating decays $B^{+}\to K^{+}{\tau }^{\pm }{\ell }^{\mp }$ ($\ell =e,\mu$) at Belle
• Constraints on subleading interactions in beta decay Lagrangian
• Scotogenic Dirac neutrino mass models embedded with leptoquarks: one pathway to address the flavor anomalies and the neutrino masses together
• 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
• Marriage between neutrino mass and flavor anomalies
• 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
• Right-handed interactions in puzzling $B$-decays
• Revisiting mono-$\tau$ tails at the LHC
• Correlating New Physics Effects in Semileptonic $\Delta C=1$ and $\Delta S=1$ Processes
• Explaining anomalies of $B$-physics, muon $g-2$ and $W$ mass in $R$-parity violating MSSM with seesaw mechanism
• The Muon Magnetic Moment and Physics Beyond the Standard Model
• Neutrinoless Double Beta Decay from Scalar Leptoquarks: Interplay with Neutrino Mass and Flavor Physics
• Muon $(g-2)$ and Flavor Puzzles in the $U(1{)}_X^{}$-gauged Leptoquark Model
• Impact of $b\to s\ell \ell$ anomalies on rare charm decays in non-universal $Z^{\prime }$ models
• Leptoquark search at the Forward Physics Facility
• 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
• Flavor physics in SU(5) GUT with scalar fields in the 45 representation
• Non-perturbative effects for dark sectors with QCD portals
• On the impact of meson mixing on $B_s\to \varphi ee$ angular observables at low $q^2$
• A neutrino window to scalar leptoquarks: from low energy to colliders
• Leptoquarks, axions and the unification of B, L, and Peccei-Quinn symmetries
• Gravitational wave signals from leptoquark-induced first order electroweak phase transitions
• ${\tau }_{B_s}/{\tau }_{B_d}$ and $\Delta {\Gamma }_s$ confront new physics in $b\to s\tau \tau$
• Linking the $R_{K^{(\ast )}}$ anomalies to the Hubble tension via a single right-handed neutrino
• Vector leptoquark contributions to lepton dipole moments
• LEX-EFT: The Light Exotics Effective Field Theory
• Leptonic signatures of color-sextet scalars
• A $\nu$ window onto leptoquarks?
• On the EFT validity for Drell-Yan tails at the LHC
• Singlet vector leptoquark model facing recent LHCb and BABAR measurements
• Dimension-5 baryon-number violation in low-scale Pati-Salam
• 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
• Lepton Flavor Violating $B\to K_2^{\ast }(1430){\mu }^{\pm }{\tau }^{\mp }$ Decays
• Discriminating 1D new physics solutions in $b\to s\ell \ell$ decays
• Search for scalar leptoquarks produced via $\tau$-lepton-quark scattering in pp collisions at $\sqrt{s}$ = 13 TeV
• Searching and identifying leptoquarks through low-energy polarized scattering processes $e^{-}p\to e^{-}{\Lambda }_c$
• Searching for new physics from SMEFT and leptoquarks at the P2 experiment
• Searching for exclusive leptoquarks with the Nambu-Jona-Lasinio composite model at the LHC and HL-LHC
• Perturbative unitarity constraints on generic Yukawa interactions
• Fermiophobic $Z^{\prime }$ model for simultaneously explaining the muon anomalies $R_{K^{(\ast )}}$ and $(g-2{)}_{\mu }$
• Triple-leptoquark interactions for tree- and loop-level proton decays
• Prospects for $B_c^{+}\to {\tau }^{+}{\nu }_{\tau }$ at FCC-ee
• Radiative Effects in the Scalar Sector of Vector Leptoquark Models
• The $B$ Anomalies, the $U_1$ Leptoquark and Dark Matter
• Rare decay $t\to c\gamma \gamma$ via scalar leptoquark doublets
• Explaining the hints for lepton flavour universality violation with three $S_2$ leptoquark generations
• Constraining Scalar Doublet and Triplet Leptoquarks with Vacuum Stability and Perturbativity
• Explaining lepton-flavor non-universality and self-interacting dark matter with $L_{\mu }-L_{\tau }$
• Imprints of flavor anomalies on neutrino oscillations through dark matter halo
• Search for lepton flavor-violating decay modes $B^0\to K^{\ast 0}{\tau }^{\pm }{\ell }^{\mp }$ ($\ell =e,\mu$) with hadronic B-tagging at Belle and Belle II
• Flavour Physics at LHCb -- 50 years of the KM paradigm