Third Family Quark-Lepton Unification at the TeV Scale

Abstract

We construct a model of quark-lepton unification at the TeV scale based on an $SU(4)$ gauge symmetry, while still having acceptable neutrino masses and enough suppression in flavor changing neutral currents. An approximate $U(2)$ flavor symmetry is an artifact of family-dependent gauge charges leading to a natural realization of the CKM mixing matrix. The model predicts sizeable violation of PMNS unitarity as well as a gauge vector leptoquark $U_1^{\mu }=(3,1,2/3)$ which can be produced at the LHC -- both effects within the reach of future measurements. In addition, recently reported experimental anomalies in semi-leptonic $B$-meson decays, both in charged $b\to c\tau \nu$ and neutral $b\to s\mu \mu$ currents, can be accommodated.

arXiv comment9 pages, 5 tables. Version accepted for publication in PLB

References in corpus (36)

• Evidence for Neutrino Oscillations from the Observation of Electron Anti-neutrinos in a Muon Anti-Neutrino Beam
• The Reactor Antineutrino Anomaly
• Test of lepton universality using $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• Test of lepton universality with $B^0\to K^{\ast 0}{\ell }^{+}{\ell }^{-}$ decays
• Measurement of an Excess of B -> D(*) Tau Nu Decays and Implications for Charged Higgs Bosons
• Physics of leptoquarks in precision experiments and at particle colliders
• Measurement of the ratio of branching fractions $\mathcal{B}({\overline{B}}^0\to D^{\ast +}{\tau }^{-}{\overline{\nu }}_{\tau })/\mathcal{B}({\overline{B}}^0\to D^{\ast +}{\mu }^{-}{\overline{\nu }}_{\mu })$
• Measurement of form-factor independent observables in the decay $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$
• Angular analysis of the $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ decay using $3\,\mbox{fb}^{-1}$ of integrated luminosity
• Measurement of the $\tau$ lepton polarization and $R(D^{\ast })$ in the decay $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$
• Event Excess in the MiniBooNE Search for ${\bar{\nu }}_{\mu }\to {\bar{\nu }}_e$ Oscillations
• Predictive Neutrino Spectrum in Minimal $SO(10)$ Grand Unification
• Unexplained Excess of Electron-Like Events From a 1-GeV Neutrino Beam
• Upper limits for neutrino oscillations muon-antineutrino to electron-antineutrino from muon decay at rest
• Anomalies in $B$-decays and $U(2)$ flavour symmetry
• U(2) and Minimal Flavour Violation in Supersymmetry
• Non-unitarity of the leptonic mixing matrix: Present bounds and future sensitivities
• Gauge leptoquark as the origin of B-physics anomalies
• Are there sterile neutrinos at the eV scale?
• Neutrino masses and mixings: Status of known and unknown $3\nu$ parameters
• Baryon Number and Lepton Universality Violation in Leptoquark and Diquark Models
• Flavour physics from an approximate U(2)^3 symmetry
• Minimal Radiative Neutrino Mass Mechanism for Inverse Seesaw Models
• Testing sterile neutrino extensions of the Standard Model at future lepton colliders
• Looking for the minimal inverse seesaw realisation
• Quark-Lepton Unification and Rare Meson Decays
• Searches for scalar leptoquarks in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• 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
• A Simple Realization of the Inverse Seesaw Mechanism
• Phenomenological Consequences of sub-leading Terms in See-Saw Formulas
• Low Scale Quark-Lepton Unification
• Diboson Excess from a New Strong Force
• Mass limits for scalar and gauge leptoquarks from $K_L^0\to e^{\mp }{\mu }^{\pm },B^0\to e^{\mp }{\tau }^{\pm }$ decays
• Predictive Pati-Salam theory of fermion masses and mixing
• A Flavorful Top-Coloron Model
• The third type of fermion mixing in the lepton and quark interactions with leptoquarks

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