Confronting the vector leptoquark hypothesis with new low- and high-energy data

Abstract

In light of new data we present an updated phenomenological analysis of the simplified $U_1$-leptoquark model addressing charged-current $B$-meson anomalies. The analysis shows a good compatibility of low-energy data (dominated by the lepton flavor universality ratios $R_D$ and $R_{D^{\ast }}$) with the high-energy constraints posed by $pp\to \tau \bar{\tau }$ Drell-Yan data. We also show that present data are well compatible with a framework where the leptoquark couples with similar strength to both left- and right-handed third-generation fermions, a scenario that is well-motivated from a model building perspective. We find that the high-energy implications of this setup will be probed at the 95% confidence level in the high-luminosity phase of the LHC.

arXiv comment8 pages, 1 appendix, 5 figures. Fixes a bug with the old HFLAV average of RD and RD* & added new RD* data. Expanded appendix, results unchanged

References in corpus (62)

• The Belle II Physics Book
• B-physics anomalies: a guide to combined explanations
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• 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
• Anomalies in $B$-decays and $U(2)$ flavour symmetry
• A three-site gauge model for flavor hierarchies and flavor anomalies
• Confronting lepton flavor universality violation in B decays with high-$p_T$ tau lepton searches at LHC
• U(2) and Minimal Flavour Violation in Supersymmetry
• $B$ Meson Anomalies in a Pati-Salam Model within the Randall-Sundrum Background
• Combined analysis of semileptonic $B$ decays to $D$ and $D^{\ast }$: $R(D^{(\ast )})$, $|V_{cb}|$, and new physics
• Gauge leptoquark as the origin of B-physics anomalies
• The $B\to D\ell \nu$ form factors at nonzero recoil and $|V_{cb}|$ from $2+1$-flavor lattice QCD
• The lifetime of the $B_c^{-}$ meson and the anomalies in $B\to D^{(\ast )}\tau \nu$
• Closing the window on single leptoquark solutions to the $B$-physics anomalies
• A model of vector leptoquarks in view of the $B$-physics anomalies
• Baryon Number and Lepton Universality Violation in Leptoquark and Diquark Models
• Flavour physics from an approximate U(2)^3 symmetry
• Importance of Loop Effects in Explaining the Accumulated Evidence for New Physics in B Decays with a Vector Leptoquark
• Search for heavy Higgs bosons decaying into two tau leptons with the ATLAS detector using $pp$ collisions at $\sqrt{s}=13$ TeV
• Third Family Quark-Lepton Unification at the TeV Scale
• $B\to K{\ell }^{+}{\ell }^{-}$ decay at large hadronic recoil
• The Leptoquark Hunter's Guide: Pair Production
• Simultaneous Explanation of the $R_K$ and $R_{D^{(\ast )}}$ Puzzles: a Model Analysis
• On the single leptoquark solutions to the $B$-physics anomalies
• Maximal Flavour Violation: a Cabibbo mechanism for leptoquarks
• The $V_{cb}$ puzzle: an update
• Reading the footprints of the B-meson flavor anomalies
• B physics Beyond the Standard Model at One Loop: Complete Renormalization Group Evolution below the Electroweak Scale
• Revisiting the vector leptoquark explanation of the B-physics anomalies
• Combined Explanations of the $b\to s{\mu }^{+}{\mu }^{-}$ and $b\to c{\tau }^{-}\bar{\nu }$ Anomalies: a General Model Analysis
• High-pT Signatures in Vector-Leptoquark Models
• On the Importance of Electroweak Corrections for B Anomalies
• Theory determination of $\bar{B}\to D^{(\ast )}{\ell }^{-}\bar{\nu }$ form factors at $\mathcal{O}(1/m_c^2)$
• With or without U(2)? Probing non-standard flavor and helicity structures in semileptonic B decays
• B-decay anomalies in Pati-Salam SU(4)
• Leptoquark toolbox for precision collider studies
• $B$ Flavour Anomalies: 2021 Theoretical Status Report
• Third-family quark-lepton unification with a fundamental composite Higgs
• Flavor hierarchies from dynamical scales
• Lepton-quark collisions at the Large Hadron Collider
• Observation of the decay ${\Lambda }_b^0\to {\Lambda }_c^{+}{\tau }^{-}{\overline{\nu }}_{\tau }$
• Single Productions of Colored Particles at the LHC: An Example with Scalar Leptoquarks
• Search for singly and pair-produced leptoquarks coupling to third-generation fermions in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Vector Leptoquarks Beyond Tree Level
• Flavor hierarchies, flavor anomalies, and Higgs mass from a warped extra dimension
• $|V_{cb}|$ and $R(D^{(\ast )})$ using lattice QCD and unitarity
• Vector Leptoquarks Beyond Tree Level III: Vector-like Fermions and Flavor-Changing Transitions
• Flavor Non-universal Pati-Salam Unification and Neutrino Masses
• Precise limits on the charge-$2/3$ $U_1$ vector leptoquark
• A chiral SU(4) explanation of the $b\to s$ anomalies
• NLO Leptoquark Production and Decay: The Narrow-Width Approximation and Beyond
• Resonant third-generation leptoquark signatures at the Large Hadron Collider
• Leptons in the Proton
• Stop Lepton Associated Production at Hadron Colliders
• Search for new phenomena in $pp$ collisions in final states with tau leptons, $b$-jets, and missing transverse momentum with the ATLAS detector
• Stability of the Higgs Sector in a Flavor-Inspired Multi-Scale Model
• Twin Pati-Salam theory of flavour with a TeV scale vector leptoquark
• Hunting for $B^{+}\to K^{+}{\tau }^{+}{\tau }^{-}$ imprints on the $B^{+}\to K^{+}{\mu }^{+}{\mu }^{-}$ dimuon spectrum
• Resonant leptoquark at NLO with POWHEG
• A view of flavour physics in 2021
• On Drell-Yan production of scalar leptoquarks coupling to heavy-quark flavours
• Lowering the scale of Pati-Salam breaking through seesaw mixing

Cited by in corpus (16)

• The Standard Model effective field theory at work
• Anomalies in Particle Physics
• Non-universal gauge interactions addressing the inescapable link between Higgs and Flavour
• Electroweak-flavour and quark-lepton unification: a family non-universal path
• Third-Family Quark-Lepton Unification and Electroweak Precision Tests
• Diquark Explanation of $b\to s{\ell }^{+}{\ell }^{-}$
• 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
• Search for leptoquarks decaying into the b$\tau$ final state in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Vector leptoquark contributions to lepton dipole moments
• ${\tau }_{B_s}/{\tau }_{B_d}$ and $\Delta {\Gamma }_s$ confront new physics in $b\to s\tau \tau$
• Third-Family Lepton-Quark Fusion
• 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
• Search for charged-lepton-flavour violating $\mu \tau qt$ interactions in top-quark production and decay in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector at the LHC
• Evidence for $B^{-}\to D^{\ast \ast 0}{\tau }^{-}\overline{{\nu }_{\tau }}$ decays
• Searches for $B^0\to K^{+}{\pi }^{-}{\tau }^{+}{\tau }^{-}$ and $B_s^0\to K^{+}{K}^{-}{\tau }^{+}{\tau }^{-}$ decays
• Leveraging intermediate resonances to probe CP violation at colliders