Scalar leptoquarks and the rare B meson decays

Abstract

We study some rare decays of $B$ meson involving the quark level transition $b\to q{l}^{+}{l}^{-}(q=d,s)$ in the scalar leptoquark model. We constrain the leptoquark parameter space using the recently measured branching ratios of $B_{s,d}\to {\mu }^{+}{\mu }^{-}$ processes. Using such parameters, we obtain the branching ratios, direct CP violation parameters and isospin asymmetries in $B\to K{\mu }^{+}{\mu }^{-}$ and $B\to \pi {\mu }^{+}{\mu }^{-}$ processes. We also obtain the branching ratios for some lepton flavour violating decays $B\to l_i^{+}{l}_j^{-}$. We find that the various anomalies associated with the isospin asymmetries of $B\to K{\mu }^{+}{\mu }^{-}$ process can be explained in the scalar leptoquark model.

28 pages, 7 figures. typos corrected, to appear in Phys. Rev. D

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• $B$ Flavour Anomalies: 2021 Theoretical Status Report
• Implications of $b\to s$ measurements
• Neutrino mixing and $R_K$ anomaly in $U(1{)}_X$ models: a bottom-up approach
• Explanation of $B\to K^{(\ast )}{\ell }^{+}{\ell }^{-}$ and muon $g-2$, and implications at the LHC
• Time dependence in $B\to V\ell \ell$ decays
• Rare semileptonic $B\to K(\pi )l_i^{-}{l}_j^{+}$ decay in vector leptoquark model
• Effects of scalar leptoquark on semileptonic ${\Lambda }_b$ decays
• A testable radiative neutrino mass model without additional symmetries and Explanation for the $b\to s{\ell }^{+}{\ell }^{-}$ anomaly
• A Three-loop Neutrino Mass Model with a Colored Triplet Scalar
• Integrating out heavy scalars with modified EOMs: matching computation of dimension-eight SMEFT coefficients
• Multi-lepton probes of new physics and lepton-universality in top-quark interactions
• Study of the rare decays $B_{s,d}^{\ast }\to {\mu }^{+}{\mu }^{-}$
• Implications of a Electroweak Triplet Scalar Leptoquark on the Ultra-High Energy Neutrino Events at IceCube
• Next-to-Leading-Order QCD Matching for $\Delta F=2$ Processes in Scalar Leptoquark Models
• Impact of lepton flavour universality violation on CP violation sensitivity of long baseline neutrino oscillation experiments
• Neutron-neutral particle mixing and its observable consequences
• Generic tests of CP-violation in high-$p_{\text{T}}$ multi-lepton signals at the LHC and beyond
• Flavour anomalies and dark matter assisted unification in $SO(10)$ GUT
• Reappraisal of the minimal flavoured $Z^{\prime }$ scenario
• Indian Contributions to LHC Theory
• Dineutron decay into sterile anti-neutrinos in neutron stars and its observable consequences
• Quark and lepton flavor model with leptoquarks in a modular $A_4$ symmetry
• Rare decay $t\to c\gamma \gamma$ via scalar leptoquark doublets
• Explaining the hints for lepton flavour universality violation with three $S_2$ leptoquark generations
• Combined analysis of $B_c\to D_s^{(\ast )}{\mu }^{+}{\mu }^{-}$ and $B_c\to D_s^{(\ast )}\nu \bar{\nu }$ decays within $Z^{\prime }$ and leptoquark new physics models