A vector leptoquark for the B-physics anomalies from a composite GUT

Abstract

A vector leptoquark at the TeV scale, mostly coupled to the fermions of the third generation, is the preferred option to explain the hints of lepton flavor universality violation in the decays of B-mesons. It seems interesting to assume that this leptoquark belongs to the same beyond the Standard Model sector that solves the hierarchy problem, since the third generation of fermions play the leading role in the instability of the Higgs potential. We present a composite Grand Unified Theory with resonances at the TeV that contains the required vector leptoquark and develops the Higgs as a pseudo Nambu-Goldstone boson. We show that anarchic partial compositeness of the Standard Model fermions can accommodate the couplings of Left-handed currents required by the B-anomalies, predicting very small couplings to the Right-handed currents without any additional hypothesis. By making use of an effective theory description of the strong dynamics, in terms of weakly coupled resonances, we are able to compute the corrections to B-physics, as well as the one-loop potential for the pseudo Nambu-Goldstone bosons. The theory has a rich phenomenology and a candidate for dark matter.

arXiv comment38 pages, 7 figures, v2: new figure and discussion on bounds from $Z\nu \bar{\nu }$ added, discussion on bounds from $Z^{\prime }$-states added, discussions on tuning added, references added, this version matches with the one accepted in JHEP

References in corpus (47)

• The Minimal Composite Higgs Model
• Physics of leptoquarks in precision experiments and at particle colliders
• A custodial symmetry for Zbb
• Light custodians in natural composite Higgs models
• B-physics anomalies: a guide to combined explanations
• Flavor Structure of Warped Extra Dimension Models
• Effective field theory approach to $b\to s\ell {\ell }^{(\prime )}$, $B\to K^{(\ast )}\nu \bar{\nu }$ and $B\to D^{(\ast )}\tau \nu$ with third generation couplings
• The Flavor of the Composite Pseudo-Goldstone Higgs
• Anomalies in $B$-decays and $U(2)$ flavour symmetry
• Vector leptoquark resolution of $R_K$ and $R_{D^{(\ast )}}$ puzzles
• A three-site gauge model for flavor hierarchies and flavor anomalies
• Warped/Composite Phenomenology Simplified
• $B$ Meson Anomalies in a Pati-Salam Model within the Randall-Sundrum Background
• Closing the window on single leptoquark solutions to the $B$-physics anomalies
• Baryon Number and Lepton Universality Violation in Leptoquark and Diquark Models
• $R(D^{\ast })$, $|V_{cb}|$, and the Heavy Quark Symmetry relations between form factors
• Importance of Loop Effects in Explaining the Accumulated Evidence for New Physics in B Decays with a Vector Leptoquark
• Emerging patterns of New Physics with and without Lepton Flavour Universal contributions
• Revisiting Lepton Flavour Universality in B Decays
• Holography for fermions
• Third Family Quark-Lepton Unification at the TeV Scale
• Extraction of $|V_{cb}|$ from $B\to D^{(\ast )}\ell {\nu }_{\ell }$ and the Standard Model predictions of $R(D^{(\ast )})$
• Simultaneous Explanation of the $R_K$ and $R_{D^{(\ast )}}$ Puzzles: a Model Analysis
• Light top partners and precision physics
• The Discrete Composite Higgs Model
• Leptoquark Flavor Patterns & B Decay Anomalies
• Maximal Flavour Violation: a Cabibbo mechanism for leptoquarks
• New Physics in $b\to s{\ell }^{+}{\ell }^{-}$ confronts new data on Lepton Universality
• Flavor and CP Invariant Composite Higgs Models
• Revisiting the vector leptoquark explanation of the B-physics anomalies
• Continuing search for new physics in $b\to s\mu \mu$ decays: two operators at a time
• Low-energy signatures of the ${\mathrm{PS}}^3$ model: from $B$-physics anomalies to LFV
• Combined explanations of B-physics anomalies: the sterile neutrino solution
• B-decay anomalies in Pati-Salam SU(4)
• A Simple Flavor Protection for RS
• Minimal Composite Higgs Models at the LHC
• A Common Origin for Neutrino Anarchy and Charged Hierarchies
• Flavor hierarchies from dynamical scales
• Composite GUTs: models and expectations at the LHC
• Custodial Leptons and Higgs Decays
• A Solution to the Flavor Problem of Warped Extra-Dimension Models
• The Bearable Compositeness of Leptons
• Simultaneous interpretation of $K$ and $B$ anomalies in terms of chiral-flavorful vectors
• Composite Higgs and leptoquarks from a simple group
• Anarchy with linear and bilinear interactions
• Beautiful mirrors for a pNGB Higgs
• A symmetry for ${\epsilon }_K$

Cited by in corpus (18)

• Tests of lepton universality using $B^0\to K_S^0{\ell }^{+}{\ell }^{-}$ and $B^{+}\to K^{\ast +}{\ell }^{+}{\ell }^{-}$ decays
• Effective Theory Approach to New Physics with Flavour: General Framework and a Leptoquark Example
• Unified explanation of flavor anomalies, radiative neutrino mass and ANITA anomalous events in a vector leptoquark model
• Precise limits on the charge-$2/3$ $U_1$ vector leptoquark
• Resonant third-generation leptoquark signatures at the Large Hadron Collider
• Sensitivity of Future Hadron Colliders to Leptoquark Pair Production in the Di-Muon Di-Jets Channel
• The Dark Side of 4321
• A model for the Singlet-Triplet Leptoquarks
• Drell-Yan production in third-generation gauge vector leptoquark models at NLO+PS in QCD
• Lepton flavour violation in rare ${\Lambda }_b$ decays
• Angular distribution of the FCNC process $B_c\to D_s^{\ast }(\to D_s\pi ){\ell }^{+}{\ell }^{-}$
• Composite Dark Matter and a horizontal symmetry
• The fate of $V_1$ vector leptoquarks: the impact of future flavour data
• Vector leptoquark contributions to lepton dipole moments
• Direct production of SM-singlet scalars at the muon collider
• Exploring New Physics in transition $b\to s{\ell }^{+}{\ell }^{-}$ through different $B_c\to D_s^{(\ast )}{\ell }^{+}{\ell }^{-}$ observables
• Searching for new physics from SMEFT and leptoquarks at the P2 experiment
• Rare decay $t\to c\gamma \gamma$ via scalar leptoquark doublets