Lepton flavor non-universality in $b\to s{\ell }^{+}{\ell }^{-}$ processes

Abstract

We explore a scenario of New Physics entering the description of $B\to K^{(\ast )}\mu \mu$ decay through couplings to the operators ${\mathcal{O}}_{9,10}^{\prime }$, satisfying $C_9^{\prime }=-C_{10}^{\prime }$. From the current data on $\mathcal{B}(B_s\to \mu \mu )$ and $\mathcal{B}(B\to K\mu \mu {)}_{[15,22]{\mathrm{GeV}}^2}$, we obtain constraints on $\mathrm{Re}{C}_{10}^{\prime }$ and $\mathrm{Im}{C}_{10}^{\prime }$ which we then assume to be lepton specific, and find $R_K=\mathcal{B}(B\to K\mu \mu )/\mathcal{B}(B\to Kee{)}_{[1,6]{\mathrm{GeV}}^2}=0.88(8)$, consistent with recent value measured at LHCb. A specific realization of this scenario is the one with a scalar leptoquark state $\Delta$, in which $C_{10}^{\prime }$ is related to the mass of $\Delta$ and its Yukawa couplings. We then show that this scenario does not make any significant impact on $B_s-{\overline{B}}_s$ mixing amplitude nor to $\mathcal{B}(B\to K\nu \bar{\nu })$. Instead, it can modify $R_{K^{\ast }}=\mathcal{B}(B\to K^{\ast }\mu \mu )/\mathcal{B}(B\to K^{\ast }ee{)}_{[1,6]{\mathrm{GeV}}^2}$, which will soon be experimentally measured and we find it to be $R_{K^{\ast }}=1.11(8)$, while $R_{K^{\ast }}/R_K=1.27(19)$. A similar ratio of forward-backward asymmetries also becomes lower than in the Standard Model.

13 pages, 3 figures, further typos corrected

References in corpus (17)

• Test of lepton universality using $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• Explaining $h\to {\mu }^{\pm }{\tau }^{\mp }$, $B\to K^{\ast }{\mu }^{+}{\mu }^{-}$ and $B\to K{\mu }^{+}{\mu }^{-}/B\to K{e}^{+}{e}^{-}$ in a two-Higgs-doublet model with gauged $L_{\mu }-L_{\tau }$
• $R_K$ and future $b\to s\ell \ell$ BSM opportunities
• Simultaneous Explanation of the $R_K$ and $R(D^{(\ast )})$ Puzzles
• Lepton Flavor Violation in B Decays?
• $SU(2)\times U(1)$ gauge invariance and the shape of new physics in rare $B$ decays
• Branching Ratio Measurements of $B_s$ Decays
• Hint of Lepton Flavour Non-Universality in $B$ Meson Decays
• New strategies for New Physics search in B -> K* nu anti-nu, B -> K nu anti-nu and B -> X(s) nu anti-nu decays
• Diagnosing lepton-nonuniversality in $b\to s\ell \ell$
• Scalar leptoquarks and the rare B meson decays
• Global fits to b -> s ll data and signs for lepton non-universality
• Cornering Scalar Leptoquarks at LHC
• Analytic calculation of two-loop QCD corrections to b\to s\ell^+\ell^- in the high q^2 region
• Explaining the Lepton Non-universality at the LHCb and CMS from a Unified Framework
• Search for second generation scalar leptoquarks in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• The effect of S-wave interference on the $B^0\to K^{\ast 0}{\ell }^{+}{\ell }^{-}$ angular observables

Cited by in corpus (94)

• Physics of leptoquarks in precision experiments and at particle colliders
• One Leptoquark to Rule Them All: A Minimal Explanation for $R_{D^{(\ast )}}$, $R_K$ and $(g-2{)}_{\mu }$
• On the Standard Model predictions for $R_K$ and $R_{K^{\ast }}$
• 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
• Global analysis of $b\to s\ell \ell$ anomalies
• Patterns of New Physics in $b\to s{\ell }^{+}{\ell }^{-}$ transitions in the light of recent data
• Anomalies in $B$-decays and $U(2)$ flavour symmetry
• Vector leptoquark resolution of $R_K$ and $R_{D^{(\ast )}}$ puzzles
• Flavour anomalies after the $R_{K^{\ast }}$ measurement
• Interpreting Hints for Lepton Flavor Universality Violation
• Closing the window on single leptoquark solutions to the $B$-physics anomalies
• Leptoquark model to explain the $B$-physics anomalies, $R_K$ and $R_D$
• Revisiting Lepton Flavour Universality in B Decays
• B-decay Anomalies in a Composite Leptoquark Model
• Matching of gauge invariant dimension 6 operators for $b\to s$ and $b\to c$ transitions
• $R_K$ and $R_{K^{\ast }}$ beyond the Standard Model
• Lepton Flavor Non-Universality in B-meson Decays from a U(2) Flavor Model
• New Physics in $b\to s{\mu }^{+}{\mu }^{-}$ after the Measurement of $R_{K^{\ast }}$
• Leptoquark Flavor Patterns & B Decay Anomalies
• Phenomenology of an $SU(2)\times SU(2)\times U(1)$ model with lepton-flavour non-universality
• Lepton Flavor Violation in Exclusive $b\to s$ Decays
• Predictions for Lepton Flavor Universality Violation in Rare B Decays in Models with Gauged $L_{\mu }-L_{\tau }$
• Lepton Flavor Non-Universality in B decays from Dynamical Yukawas
• Excesses of muon $g-2$, $R_{D^{(\ast )}}$, and $R_K$ in a leptoquark model
• Gauge-invariant implications of the LHCb measurements on Lepton-Flavour Non-Universality
• Prospects of discovering new physics in rare charm decays
• One constraint to kill them all?
• Explaining the $R_K$ and $R_{D^{(\ast )}}$ anomalies with vector leptoquarks
• Lepton flavor universality violation without new sources of quark flavor violation
• Generalised helicity formalism, higher moments and the $B\to K_{J_K}(\to K\pi ){\bar{\ell }}_1{\ell }_2$ angular distributions
• The Neutrino Magnetic Moment Portal: Cosmology, Astrophysics, and Direct Detection
• Generic Loop Effects of New Scalars and Fermions in $b\to s{\ell }^{+}{\ell }^{-}$, $(g-2{)}_{\mu }$ and a Vector-like $4^{\mathrm{th}}$ Generation
• The role of the $S_3$ GUT leptoquark in flavor universality and collider searches
• Lepton-flavor universality violation in $R_K$ and $R_{D^{(\ast )}}$ from warped space
• Vector Leptoquarks and the 750 GeV Diphoton Resonance at the LHC
• A Natural origin for the LHCb anomalies
• Flavorful leptoquarks at hadron colliders
• Lepton flavor (universality) violation in rare kaon decays
• A $L_{\mu }-L_{\tau }$ theory of Higgs flavor violation and $(g-2{)}_{\mu }$
• A $Z^{\prime }$ Model for $b\to s\ell \bar{\ell }$ Flavour Anomalies
• Penguin $b\to s{\ell }^{\prime +}{\ell }^{\prime -}$ and $B$-meson anomalies in a gauged $L_{\mu }-L_{\tau }$
• Implications for New Physics in $b\to s\mu \mu$ transitions after recent measurements by Belle and LHCb
• New Physics in $b\to s{\mu }^{+}{\mu }^{-}$: Distinguishing Models through CP-Violating Effects
• Neutrino mixing and $R_K$ anomaly in $U(1{)}_X$ models: a bottom-up approach
• Searching for Leptoquarks at IceCube and the LHC
• Study of the rare semileptonic decays $B_d^0\to K^{\ast }{l}^{+}{l}^{-}$ in scalar leptoquark model
• Two Higgs Doublet Models and $b\to s$ exclusive decays
• A common origin of $R_K$ and neutrino masses
• $B_s\to {\mu }^{+}{\mu }^{-}$ as current and future probe of new physics
• Understanding the first measurement of $\mathcal{B}(B\to K\nu \bar{\nu })$
• Charming new physics in rare B-decays and mixing?
• Footprints of leptoquarks: from $R_{K^{(\ast )}}$ to $K\to \pi \nu \bar{\nu }$
• Explanation of $B\to K^{(\ast )}{\ell }^{+}{\ell }^{-}$ and muon $g-2$, and implications at the LHC
• Weak decays of unstable $b$-mesons
• Leptoquarks and Matter Unification: Flavor Anomalies and the Muon $g-2$
• Leptoquark patterns unifying neutrino masses, flavor anomalies, and the diphoton excess
• Lepton flavour violating B meson decays via scalar leptoquark
• Enhancing Scalar Productions with Leptoquarks at the LHC
• Probing the $R_{K^{(\ast )}}$ Anomaly at a Muon Collider
• Charged-Lepton Mixing and Lepton Flavor Violation
• More Lepton Flavor Violating Observables for LHCb's Run 2
• Effects of scalar leptoquark on semileptonic ${\Lambda }_b$ decays
• Hints of Natural Supersymmetry in Flavor Anomalies?
• Leptoquark effects on $b\to s\nu \bar{\nu }$ and $B\to K{l}^{+}{l}^{-}$ decay processes
• A Three-loop Neutrino Mass Model with a Colored Triplet Scalar
• Non-minimal $331$ model for Lepton Flavour Universality Violation in $b\to s\ell \ell$ decays
• Combined explanations of $B$-physics anomalies, $(g-2{)}_{e,\mu }$ and neutrino masses by scalar leptoquarks
• Probing sterile neutrinos in the framework of inverse seesaw mechanism through leptoquark productions
• Assessing lepton-flavour non-universality from $B\to K^{\ast }\ell \ell$ angular analyses
• Testing Leptoquark and $Z^{\prime }$ Models via $B\to K_1(1270,1400){\mu }^{+}{\mu }^{-}$ Decays
• Flavour issues in warped custodial models: $B$ anomalies and rare $K$ decays
• On the amplitudes for the CP-conserving $K^{\pm }(K_S)\to {\pi }^{\pm }({\pi }^0){\ell }^{+}{\ell }^{-}$ rare decay modes
• Implications of the $R_K$ and $R_{K^{\ast }}$ anomalies
• Constraints on Scalar Leptoquark from Kaon Sector
• B Anomalies and Leptoquarks at the LHC: Beyond the Lepton-Quark Final State
• Implication of family non-universal $Z^{\prime }$ model to rare exclusive $b\to s(l\bar{l},\nu \bar{\nu })$ transitions
• Effect of scalar leptoquarks on the lepton flavor violation decays of B meson
• A composite pNGB leptoquark at the LHC
• $K\to \pi {\ell }^{+}{\ell }^{-}$ form factor in the Large-N${}_c$ and cut-off regularization method
• Non-resonant Leptoquark with multigeneration couplings to $\mu \mu jj$ and $\mu \nu jj$ at LHC
• Leptoquarks in Flavour Physics
• Flavour Anomalies in $b\to s{\ell }^{+}{\ell }^{-}$ Processes - a round table Discussion
• Direct production of SM-singlet scalars at the muon collider
• Theoretical Prospects for B Physics
• Revisiting the Scalar Leptoquark ($S_1$) Model with the Updated Leptonic Constraints
• Mutually elusive: vectorlike antileptons and leptoquarks
• The Revival of $U(1{)}_{L_e-L_{\mu }}$: A Natural Solution for $(g-2{)}_{\mu }$ with a Sub-GeV Dark Matter
• Testing spin-2 mediator by angular observables in $b\to s{\mu }^{+}{\mu }^{-}$
• Perturbative unitarity constraints on generic Yukawa interactions
• Reappraisal of the minimal flavoured $Z^{\prime }$ scenario
• Rare b-hadron decays as probe of new physics
• Model Dependent Analysis of D_((s))^+ arrows η^((')) l^+ ν_l Decays in Beyond Standard Model
• Novel Leptoquark Pair Production at LHC
• Flavor Anomalies and Quark-Lepton Unification