New physics in $b\to s$ transitions after LHC run 1

Abstract

We present results of global fits of all relevant experimental data on rare $b\to s$ decays. We observe significant tensions between the Standard Model predictions and the data. After critically reviewing the possible sources of theoretical uncertainties, we find that within the Standard Model, the tensions could be explained if there are unaccounted hadronic effects much larger than our estimates. Assuming hadronic uncertainties are estimated in a sufficiently conservative way, we discuss the implications of the experimental results on new physics, both model independently as well as in the context of the minimal supersymmetric standard model and models with flavour-changing $Z^{\prime }$ bosons. We discuss in detail the violation of lepton flavour universality as hinted by the current data and make predictions for additional lepton flavour universality tests that can be performed in the future. We find that the ratio of the forward-backward asymmetries in $B\to K^{\ast }{\mu }^{+}{\mu }^{-}$ and $B\to K^{\ast }{e}^{+}{e}^{-}$ at low dilepton invariant mass is a particularly sensitive probe of lepton flavour universality and allows to distinguish between different new physics scenarios that give the best description of the current data.

49 pages, 12 figures. v4: matches version published in EPJC

References in corpus (29)

• Neutrino Trident Production: A Powerful Probe of New Physics with Neutrino Beams
• B_{s,d} -> l+ l- in the Standard Model with Reduced Theoretical Uncertainty
• Dressing L_mu - L_tau in Color
• Addressing the LHC flavour anomalies with horizontal gauge symmetries
• Angular Distributions of B -> K ll Decays
• $R_K$ and future $b\to s\ell \ell$ BSM opportunities
• Lepton Flavor Violation in B Decays?
• Current status of the Standard Model CKM fit and constraints on $\Delta F=2$ New Physics
• On the impact of power corrections in the prediction of B->K*mu+mu- observables
• B->V gamma Beyond QCD Factorisation
• 331 models facing new b -> s mu^+ mu^- data
• 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
• Global fits to b -> s ll data and signs for lepton non-universality
• Logarithmically Enhanced Corrections to the Decay Rate and Forward Backward Asymmetry in anti-B --> X(s) l+ l-
• On the LHCb anomaly in B -> K* l+ l-
• Cornering New Physics in b --> s Transitions
• Constraining the Natural MSSM through tunneling to color-breaking vacua at zero and non-zero temperature
• The Anatomy of Z' and Z with Flavour Changing Neutral Currents in the Flavour Precision Era
• Analytic calculation of two-loop QCD corrections to b\to s\ell^+\ell^- in the high q^2 region
• Reevaluation of Neutron Electric Dipole Moment with QCD Sum Rules
• (A)symmetries of weak decays at and near the kinematic endpoint
• Time dependence in $B\to V\ell \ell$ decays
• A bound on the charm chromo-EDM and its implications
• Neutron Electric Dipole Moment Induced by the Strangeness Revisited
• Rare Top-quark Decays to Higgs boson in MSSM
• Testing New Physics Effects in $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$
• Fermion Hierarchy from Sfermion Anarchy
• SUSY FLAVOR v2.5: a computational tool for FCNC and CP-violating processes in the MSSM

Cited by in corpus (209)

• $B\to V{\ell }^{+}{\ell }^{-}$ in the Standard Model from Light-Cone Sum Rules
• Angular analysis of the $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ decay using $3\,\mbox{fb}^{-1}$ of integrated luminosity
• One Leptoquark to Rule Them All: A Minimal Explanation for $R_{D^{(\ast )}}$, $R_K$ and $(g-2{)}_{\mu }$
• 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
• Angular analysis and differential branching fraction of the decay $B_s^0\to \varphi {\mu }^{+}{\mu }^{-}$
• Measurement of $CP$-averaged observables in the $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ decay
• Interpreting Hints for Lepton Flavor Universality Violation
• B-decay discrepancies after Moriond 2019
• Towards the discovery of new physics with lepton-universality ratios of $b\to s\ell \ell$ decays
• Non-abelian gauge extensions for B-decay anomalies
• Importance of Loop Effects in Explaining the Accumulated Evidence for New Physics in B Decays with a Vector Leptoquark
• Explaining Dark Matter and $B$ Decay Anomalies with an $L_{\mu }-L_{\tau }$ Model
• Review of Lepton Universality tests in B decays
• Revisiting Lepton Flavour Universality in B Decays
• $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ decays at large recoil in the Standard Model: a theoretical reappraisal
• 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
• CP Violation in Leptonic Rare $B_s^0$ Decays as a Probe of New Physics
• Lepton Flavor Non-Universality in B-meson Decays from a U(2) Flavor Model
• On the anomalies in the latest LHCb data
• Reassessing the discovery potential of the $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ decays in the large-recoil region: SM challenges and BSM opportunities
• Simultaneous Explanation of the $R_K$ and $R_{D^{(\ast )}}$ Puzzles: a Model Analysis
• A Dark Matter Relic From Muon Anomalies
• Branching fraction measurements of the rare $B_s^0\to \varphi {\mu }^{+}{\mu }^{-}$ and $B_s^0\to f_2^{\prime }(1525){\mu }^{+}{\mu }^{-}$ decays
• Reading the footprints of the B-meson flavor anomalies
• Reconsidering the One Leptoquark solution: flavor anomalies and neutrino mass
• Phenomenology of an $SU(2)\times SU(2)\times U(1)$ model with lepton-flavour non-universality
• A Global Likelihood for Precision Constraints and Flavour Anomalies
• Rare $B$ Decays as Tests of the Standard Model
• Lepton Flavor Violation in Exclusive $b\to s$ Decays
• New Physics in $b\to s{\ell }^{+}{\ell }^{-}$ confronts new data on Lepton Universality
• ${\Lambda }_b\to \Lambda {\ell }^{+}{\ell }^{-}$ form factors, differential branching fraction, and angular observables from lattice QCD with relativistic $b$ quarks
• 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
• Improved Theory Predictions and Global Analysis of Exclusive $\mathbf{b}\to \mathbf{s}{\mathbf{\mu }}^{+}{\mathbf{\mu }}^{-}$ Processes
• Excesses of muon $g-2$, $R_{D^{(\ast )}}$, and $R_K$ in a leptoquark model
• Patterns of Flavour Violation in Models with Vector-Like Quarks
• Towards a unified explanation of $R_{D^{(\ast )}}$, $R_K$ and $(g-2{)}_{\mu }$ anomalies in a left-right model with leptoquarks
• Gauge-invariant implications of the LHCb measurements on Lepton-Flavour Non-Universality
• Quark flavour observables in the Littlest Higgs model with T-parity after LHC Run 1
• Constraints on new physics from radiative $B$ decays
• Non-local matrix elements in $B_{(s)}\to \{K^{(\ast )},\varphi \}{\ell }^{+}{\ell }^{-}$
• On the Importance of Electroweak Corrections for B Anomalies
• $(g-2{)}_{\mu }$, Lepton Flavour Violation and $Z$ Decays with Leptoquarks: Correlations and Future Prospects
• One constraint to kill them all?
• Flavor constraints on the Two Higgs Doublet Models of $Z_2$ symmetric and aligned types
• $K\to \pi \nu \bar{\nu }$ and ${\epsilon }^{\prime }/\epsilon$ in Simplified New Physics Models
• Lepton flavor universality violation without new sources of quark flavor violation
• Angular analysis of the $B^{+}\to K^{\ast +}{\mu }^{+}{\mu }^{-}$ decay
• Vector Leptoquarks and the 750 GeV Diphoton Resonance at the LHC
• Flavorful leptoquarks at hadron colliders
• Hadronic uncertainties in $B\to K^{\ast }{\mu }^{+}{\mu }^{-}$: a state-of-the-art analysis
• More Indications for Lepton Nonuniversality in $b\to s{\ell }^{+}{\ell }^{-}$
• Lepton flavor (universality) violation in rare kaon decays
• On lepton non-universality in exclusive $b\to s\ell \ell$ decays
• A $L_{\mu }-L_{\tau }$ theory of Higgs flavor violation and $(g-2{)}_{\mu }$
• Loop effects of heavy new scalars and fermions in $b\to s{\mu }^{+}{\mu }^{-}$
• Z'-induced FCNC decays of top, beauty and strange quarks
• A closer look at the $R_D$ and $R_{D^{\ast }}$ anomalies
• Indirect Constraints on the Scalar Di-Photon Resonance at the LHC
• Linear flavour violation and anomalies in B physics
• Implications for New Physics in $b\to s\mu \mu$ transitions after recent measurements by Belle and LHCb
• Direct and indirect signals of natural composite Higgs models
• Minimal unified resolution to $R_{K^{(\ast )}}$ and $R(D^{(\ast )})$ anomalies with lepton mixing
• GUT-constrained supersymmetry and dark matter in light of the new $(g-2{)}_{\mu }$ determination
• 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
• A near-minimal leptoquark model for reconciling flavour anomalies and generating radiative neutrino masses
• Large hadronic power corrections or new physics in the rare decay B-->K* mu+ mu- ?
• Measurement of the phase difference between short- and long-distance amplitudes in the $B^{+}\to K^{+}{\mu }^{+}{\mu }^{-}$ decay
• A "Vector-like chiral" fourth family to explain muon anomalies
• Flavor anomalies and dark matter in SUSY with an extra U(1)
• The experimental status of direct searches for exotic physics beyond the standard model at the Large Hadron Collider
• Dispersive Analysis of $B\to K^{(\ast )}$ and $B_s\to \varphi$ Form Factors
• The Dark $L_{\mu }-L_{\tau }$ Rises via Kinetic Mixing
• Interpreting the $R_{K^{(\ast )}}$ Anomaly in the Colored Zee-Babu Model
• Two Higgs Doublet Models and $b\to s$ exclusive decays
• $B_s\to {\mu }^{+}{\mu }^{-}$ as current and future probe of new physics
• Low-energy Effects of Lepton Flavour Universality Violation
• Explaining $B\to K^{(\ast )}{\ell }^{+}{\ell }^{-}$ anomaly by radiatively induced coupling in $U(1{)}_{\mu -\tau }$ gauge symmetry
• LHCb anomalies from a natural perspective
• Unveiling Hidden Physics at the LHC
• Toward a coherent solution of diphoton and flavor anomalies
• ${\epsilon }^{\prime }/\epsilon$ in 331 Models
• Charming new physics in rare B-decays and mixing?
• Explanation of $B\to K^{(\ast )}{\ell }^{+}{\ell }^{-}$ and muon $g-2$, and implications at the LHC
• Collider Constraints on $Z^{\prime }$ Models for Neutral Current $B-$Anomalies
• Measuring the Breaking of Lepton Flavour Universality in $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$
• Aligned and Spontaneous Flavor Violation
• Weak decays of unstable $b$-mesons
• A Light Higgs at the LHC and the B-Anomalies
• The CKM Parameters
• $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ and neutrino mass in the 2HDM-III with right-handed neutrinos
• On the significance of new physics in $b\to s{\ell }^{+}{\ell }^{-}$ decays
• $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ Decay in the Aligned Two-Higgs-Doublet Model
• Angular distribution of polarised ${\Lambda }_b$ baryons decaying to $\Lambda {\ell }^{+}{\ell }^{-}$
• Asymptotic safety of gravity, the Higgs boson mass and beyond the Standard Model physics
• Evidence for Isospin Violation and Measurement of $CP$ Asymmetries in $B\to K^{\ast }(892)\gamma$
• New physics in $b\to s\ell \ell$ decays with complex Wilson coefficients
• Stringy explanation of $b\to s{\ell }^{+}{\ell }^{-}$ anomalies
• Muon g-2 and related phenomenology in constrained vector-like extensions of the MSSM
• The $B\to K^{\ast }$ form factors on the lattice
• Reconciling $B$-decay anomalies with neutrino masses, dark matter and constraints from flavour violation
• Using ${\Lambda }_b\to \Lambda {\mu }^{+}{\mu }^{-}$ data within a Bayesian analysis of $|\Delta B|=|\Delta S|=1$ decays
• Reconciling dark matter, $R_{K^{(\ast )}}$ anomalies and $(g-2{)}_{\mu }$ in an $L_{\mu }-L_{\tau }$ scenario
• Angular analysis of the decay B${}^{+}$ $\to$ K${}^{+}{\mu }^{+}{\mu }^{-}$ in proton-proton collisions at $\sqrt{s}=$ 8 TeV
• Probing lepton flavour (universality) violation at NA62 and future kaon experiments
• New Physics in Rare B Decays after Moriond 2021
• A nonunitary interpretation for a single vector leptoquark combined explanation to the $B$-decay anomalies
• Exhaustive Model Selection in $b\to s\ell \ell$ Decays: Pitting Cross-Validation against AIC${}_c$
• Heavy Flavour Physics and CP Violation at LHCb: a Ten-Year Review
• Revisiting Minimal Lepton Flavour Violation in the Light of Leptonic CP Violation
• More Lepton Flavor Violating Observables for LHCb's Run 2
• Flavor anomalies from asymptotically safe gravity
• Testing dark matter with Cherenkov light -- prospects of H.E.S.S. and CTA for exploring minimal supersymmetry
• Revisiting the $B$-physics anomalies in $R$-parity violating MSSM
• Rare b hadron decays at the LHC
• Classification of anomaly-free 2HDMs with a gauged U(1)' symmetry
• Hints of Natural Supersymmetry in Flavor Anomalies?
• Contributions to $b\to s\ell \ell$ Anomalies from $R$-Parity Violating Interactions
• Charming New $B$-Physics
• Phenomenology of flavorful composite vector bosons in light of $B$ anomalies
• Constraints on $Z^{\prime }$ Boson within Minimal Flavor Violation
• Exact NLO Matching and Analyticity in $b\to s\ell \ell$
• Amplitude analysis of the $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ decay
• Recent $\mathbf{B}$ Physics Anomalies - a First Hint for Compositeness?
• Electroweak symmetry breaking and collider signatures in the next-to-minimal composite Higgs model
• Hadron Collider Sensitivity to Fat Flavourful $Z^{\prime }$s for $R_{K^{(\ast )}}$
• $R_{K^{(\ast )}}$ and $R(D^{(\ast )})$ anomalies resolved with lepton mixing
• New physics in $B\to K^{\ast }{\tau }^{+}{\tau }^{-}$: A model independent analysis
• Direct determination of Wilson coefficients using $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ decays
• Anomalous triple gauge couplings from $B$-meson and kaon observables
• Constraints on $Z^{\prime }$ solutions to the flavor anomalies with trans-Planckian asymptotic safety
• Phenomenology of the simple 3-3-1 model with inert scalars
• Search for $t{Z}^{\prime }$ associated production induced by $tc{Z}^{\prime }$ couplings at the LHC
• Flavor anomalies at the LHC and the R-parity violating supersymmetric model extended with vectorlike particles
• Flavour anomalies from a split dark sector
• The Higgs Mass in the MSSM at two-loop order beyond minimal flavour violation
• Bs to mu mu gamma from Bs to mu mu
• Assessing lepton-flavour non-universality from $B\to K^{\ast }\ell \ell$ angular analyses
• On the amplitudes for the CP-conserving $K^{\pm }(K_S)\to {\pi }^{\pm }({\pi }^0){\ell }^{+}{\ell }^{-}$ rare decay modes
• Flavour anomalies on the eve of the Run-2 verdict
• Constraining rare B decays by ${\mu }^{+}{\mu }^{-}\to tc$ at future lepton colliders
• Anomalies in $b\to s$ transitions and dark matter
• On Lepton Flavor Universality in Top Quark Decays
• Consequences of $b\to s{\mu }^{+}{\mu }^{-}$ anomalies on $B\to K^{(\ast )}\nu \bar{\nu }$, $B_s\to (\eta ,{\eta }^{\prime })\nu \bar{\nu }$ and $B_s\to \varphi \nu \bar{\nu }$ decay observables
• Rank-One Flavor Violation and B-meson anomalies
• Probing new physics through $B_s^{\ast }\to {\mu }^{+}{\mu }^{-}$ decay
• The history of LHCb
• Lepton Flavor Violation in a $Z^{\prime }$ model for the $b\to s$ anomalies
• $B\to K_2^{\ast }(1430){\ell }^{+}{\ell }^{-}$ distributions in Standard Model at large recoil
• Loopy Determinations of $V_{ub}$ and $V_{cb}$
• Status of rare exclusive $B$ meson decays in 2018
• Angular distribution of the FCNC process $B_c\to D_s^{\ast }(\to D_s\pi ){\ell }^{+}{\ell }^{-}$
• Prospects for New Physics searches with ${\Lambda }_b\to \Lambda (1520){\ell }^{+}{\ell }^{-}$ decays
• Top FCNC interactions through dimension six four-fermion operators at the electron proton collider
• Explaining the $R_K$ and $R_{K^{\ast }}$ Anomalies With Right-handed Sneutrino
• Search for the lepton-flavor-violating decay $B^0\to K^{\ast 0}{\mu }^{\pm }{e}^{\mp }$
• Search for the vectorlike leptons in the U(1)${}_X$ model inspired by the $B$-meson decay anomalies
• A connection between flavour anomaly, neutrino mass, and axion
• Long-distance weak annihilation contribution to the $B^{\pm }\to ({\pi }^{\pm },K^{\pm }){\ell }^{+}{\ell }^{-}$ decays
• LHCb anomaly in $\mathbf{B}\to {\mathbf{K}}^{\ast }{\mathbf{\mu }}^{+}{\mathbf{\mu }}^{-}$ optimised observables and potential of ${\mathbf{Z}}^{\prime }$ Model
• $B-L$ violating nucleon decays as a probe of leptoquarks and implications for baryogenesis
• Constraints on Two Higgs Doublet Model Parameters in the light of rare $B$-Decays
• Re-examination of the rare decay $B_s\to \varphi {\mu }^{+}{\mu }^{-}$ using holographic light-front QCD
• The fate of $V_1$ vector leptoquarks: the impact of future flavour data
• $B\to K^{\ast }{l}^{+}{l}^{-}$: Zeroes of angular observables as test of standard model
• Flavor physics induced by light $Z^{\prime }$ from SO(10) GUT
• Correlating the CDF $W$-boson mass shift with the $b\to s{\ell }^{+}{\ell }^{-}$ anomalies
• Flavour Anomalies in $b\to s{\ell }^{+}{\ell }^{-}$ Processes - a round table Discussion
• Rare B-Meson Decays at the Crossroads
• New physics in $\text{b}\to \text{s}$ transitions in the MF331 model
• Anomalous gauge couplings vis-$\grave{a}$-vis $(g-2{)}_{\mu }$ and flavor observables
• Signal of right-handed currents using $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ observables at the kinematic endpoint
• Yukawa Unification with light supersymmetric particles consistent with LHC constraints
• Rare decays of b hadrons
• b-s Anomaly Decays in Covariant Quark Model
• Constraints on the anomalous $Wtb$ couplings from $B$-physics experiments
• Naturalness from a Composite Top?
• Searching for New Physics in Semi-Leptonic Baryon Decays
• Search for opposite sign muon-tau pair and a b-jet at LHC in the context of flavor anomalies
• Investigating New Physics through the Observables of Semileptonic $B_s\to K^{\ast }(\to K\pi ){\mu }^{+}{\mu }^{-}$ Decay
• Analysis of Angular Observables of ${\Lambda }_b\to \Lambda (\to p\pi ){\mu }^{+}{\mu }^{-}$ Decay in Standard and $Z^{\prime }$ Models
• In-medium mass shift of two-flavored heavy mesons, $B_c$, $B_c^{\ast }$, $B_s$, $B_s^{\ast }$, $D_s$ and $D_s^{\ast }$
• Implication of Z-mediated FCNC on semileptonic decays $B_s\to \varphi l^{+}{l}^{-}$ and $B^{+}\to K^{+}{l}^{+}{l}^{-}$
• Heavy-heavy and heavy-light mesons in cold nuclear matter
• Explaining the $b\to s{\ell }^{+}{\ell }^{-}$ anomalies in $Z^{\prime }$ scenarios with top-FCNC couplings
• Manifestation of Lepton Interaction Nonuniversality in Spontaneously Violated Mirror Symmetry
• Reappraisal of the minimal flavoured $Z^{\prime }$ scenario
• Study of $B_s^0\to l^{+}{l}^{-}\gamma$ decays in the nonuniversal Z' model
• ${\Lambda }_b\to \Lambda (\to p{\pi }^{-}){\ell }^{+}{\ell }^{-}$ as probe of CP-violating New Physics
• Measurement of $B\to K{}^{\ast }(892)\gamma$ decays at Belle II
• Recent progress in decays of $b$ and $c$ hadrons
• First measurement of time-dependent $CP$ violation in the flavor-changing neutral-current decay $B^0\to K_S^0{\mu }^{+}{\mu }^{-}$
• ${\Xi }_b\to \Xi$ form factors from lattice QCD and Standard-Model predictions for ${\Xi }_b\to \Xi {\mu }^{+}{\mu }^{-}$ and ${\Xi }_b\to \Xi \gamma$ decays
• Is there really a $W\to \tau \nu$ puzzle?
• Rare b-hadron decays as probe of new physics
• Probing new physics in $B\to D{\ell }^{+}{\ell }^{-}$ decays by using angular asymmetries
• The Revival of Kaon Flavour Physics
• Kaon Flavour Physics Strikes Back
• Tensions in the flavour sector
• Flavour Physics at LHCb -- 50 years of the KM paradigm
• Non-parametric and continuous extraction of amplitudes in electroweak penguin decays