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

  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},
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… 

Figures and Tables from this paper

RK and RK* in an aligned 2HDM with right-handed neutrinos
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
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
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
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
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
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
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
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
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
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 $\tau$


Revisiting the one leptoquark solution to the R(D(∗)) anomalies and its phenomenological implications
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−$$ \overline{B}\to
Palatable leptoquark scenarios for lepton flavor violation in exclusive b → sℓ1ℓ2 modes
A bstractWe examine various scenarios that involve a light O$$ \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
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 $R_{K^\ast}^\mathrm{exp} < R_{K^\ast}^\mathrm{SM}$
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?
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
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
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
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
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
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,