# Closing the window on single leptoquark solutions to the B-physics anomalies

@article{Angelescu2018ClosingTW,
title={Closing the window on single leptoquark solutions to the B-physics anomalies},
author={Andrei Angelescu and Damir Be{\vc}irevi{\'c} and Darius A. Faroughy and Florentin Jaffredo and Olcyr Sumensari},
journal={Journal of High Energy Physics},
year={2018},
volume={2018},
pages={1-33}
}
• Published 24 August 2018
• Physics
• Journal of High Energy Physics
A bstractWe examine various scenarios in which the Standard Model is extended by a light leptoquark state to solve for one or both B-physics anomalies, viz. RD*exp>RD*SM$${R}_{D^{\left(*\right)}}^{\exp }>{R}_{D^{\left(*\right)}}^{\mathrm{SM}}$$ or/and RK*exp>RK*SM$${R}_{K^{\left(*\right)}}^{\exp }>{R}_{K^{\left(*\right)}}^{\mathrm{SM}}$$. To do so we combine the constraints arising both from the low-energy observables and from direct searches at the LHC. We find that none of the scalar…
223 Citations

## Figures and Tables from this paper

RK and RK* in an aligned 2HDM with right-handed neutrinos
• Physics
• 2020
We consider the possibility of explaining the recent ${R}_{K}$ and ${R}_{{K}^{*}}$ anomalies in a two-Higgs doublet model, known as aligned, combined with a low-scale seesaw mechanism generating
Testing leptoquark and Z′ models via B→K1(1270,1400)μ+μ− decays
• Physics
Physical Review D
• 2019
The measurements of $R_{K^{(*)}}=\mathcal B(B\to K^{(*)}\mu^{+}\mu^{-})/\mathcal B(B\to K^{(*)}e^{+}e^{-})$ in recent years have hinted lepton flavor non-universality and thus drawn widespread
Constraining the minimal flavor violating leptoquark explanation of the RD(*) anomaly
• Physics
Physical Review D
• 2019
There has been persistent disagreement between the Standard Model (SM) prediction and experimental measurements of $R_{D^{(*)}}=\mathcal{B}(\bar B \rightarrow D^{(*)} \tau CP violation in same-sign dilepton production at the LHC • Physics • 2020 If the neutrino is a Majorana particle, low-energy lepton-number-violating (LNV) processes, such as neutrinoless double-beta ($0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$) decay, are D* polarization vs. RD∗$${R}_{D^{\left(\ast \right)}}$$ anomalies in the leptoquark models • Physics Journal of High Energy Physics • 2019 A bstractPolarization measurements in B¯→D∗τν¯$$\overline{B}\to {D}^{\left(\ast \right)}\tau \overline{\nu}$$ are useful to check consistency in new physics explanations for the RD and RD*$$Collider signature of V_2 Leptoquark with b → s flavour observables • Physics Letters in High Energy Physics • 2019 The Leptoquark model has been instrumental in explaining the observed lepton flavour universality violating charged (b\to c) and neutral (b\to s) current anomalies that have been the cause for RD(*) motivated S1 leptoquark scenarios: Impact of interference on the exclusion limits from LHC data • Physics Physical Review D • 2019 Motivated by the persistent anomalies in the semileptonic B-meson decays, we investigate the competency of LHC data to constrain the R_{D^{(*)}}-favoured parameter space in a charge -1/3 scalar Effects of vector leptoquarks on {\Lambda_b \rightarrow \Lambda_c \ell\, \overline{\nu}_\ell} decay • Physics • 2019 Experimental data on R(D^{(*)}) , R(K^{(*)}) and R(J/\psi) , provided by different collaborations, show sizable deviations from the SM predictions. To describe these anomalies many new Model for the singlet-triplet leptoquarks • Physics • 2020 The deviations of B-meson decays measured in R_{D^{(*)}}^{\tau\ell} and R_{K^{(*)}}^{\mu e} can be explained by the presence of two scalar leptoquarks, a singlet S_1 and a triplet S_3, Phenomenology of \,{{b\to c\tau\bar\nu }}\, decays in a scalar leptoquark model • Physics Chinese Physics C • 2019 During the past few years, hints of Lepton Flavour Universality (LFU) violation have been observed in b \to c \tau \bar\nu and b \to s \ell^+ \ell^- transitions. Recently, the D^* and \tau ## References SHOWING 1-10 OF 254 REFERENCES Revisiting the one leptoquark solution to the R(D(∗)) anomalies and its phenomenological implications • Physics • 2016 A bstractIt has been shown recently that the anomalies observed in B¯→D*τν¯τ$$ \overline{B}\to {D}^{\left(*\right)}\tau {\overline{\nu}}_{\tau } $$and B¯→K¯ℓ+ℓ−$$ \overline{B}\to Palatable leptoquark scenarios for lepton flavor violation in exclusive b → sℓ1ℓ2 modes • Physics • 2016 A bstractWe examine various scenarios that involve a light O$$\mathcal{O}$$(1 TeV) leptoquark state and select those which are compatible with the current experimental values for ℬ(Bs → μμ), Reconsidering the one leptoquark solution: flavor anomalies and neutrino mass • Physics • 2017 A bstractWe reconsider a model introducing a scalar leptoquark ϕ ∼ (3,1, −1/3) to explain recent deviations from the standard model in semileptonic B decays. The leptoquark can accommodate the A leptoquark model to accommodate$R_K^\mathrm{exp} < R_K^\mathrm{SM}$and$R_{K^\ast}^\mathrm{exp} < R_{K^\ast}^\mathrm{SM}$• Physics • 2017 We show that a modification of the model with a low energy scalar leptoquark state carrying hypercharge$Y=7/6$allows to accommodate both$R_K<1$and$R_{K^\ast}<1$, through loop effects, consistent Lepton flavor violation in B decays? • Physics Physical review letters • 2015 A simple model shows that these rates could lie just below current limits, and stresses the importance of searches for lepton flavor violations, especially for B→Kμe, Kμτ, and B_{s}→ μe, μτ. Combined analysis of semileptonic$B$decays to$D$and$D^*$:$R(D^{(*)})$,$|V_{cb}|$, and new physics • Physics • 2017 The measured$\bar{B}\to D^{(*)} l \bar\nu$decay rates for light leptons ($l=e,\mu$) constrain all$\bar{B}\to D^{(*)}$semileptonic form factors, by including both the leading and${\cal
More model-independent analysis of b→s processes
• Materials Science, Mathematics
• 2004
We study model-independently the implications of nonstandard scalar and pseudoscalar interactions for the decays $\stackrel{\ensuremath{\rightarrow}}{b}s\ensuremath{\gamma},$
Palatable Leptoquark Scenarios for Lepton Flavor Violation in Exclusive $b\to s\ell_1\ell_2$ modes
• Physics
• 2016
We examine various scenarios that involve a light ${\cal O}(1 TeV)$ leptoquark state and select those which are compatible with the current experimental values for $\mathcal{B}(B_s\to \mu\mu)$,
A leptoquark model to accommodate RKexp < RKSM and RK∗exp
• Physics
• 2017
A bstractWe show that a modification of the model with a low energy scalar leptoquark state carrying hypercharge Y = 7/6 allows to accommodate both RK< 1 and RK∗ < 1, through loop effects, consistent
Test of lepton universality with $B^{0} \rightarrow K^{*0}\ell^{+}\ell^{-}$ decays
• Physics
• 2017
A test of lepton universality, performed by measuring the ratio of the branching fractions of the $B^{0} \rightarrow K^{*0}\mu^{+}\mu^{-}$ and $B^{0} \rightarrow K^{*0}e^{+}e^{-}$ decays,