Hadronic and New Physics Contributions to $b\to s$ Transitions

Abstract

Assuming the source of the anomalies observed recently in $b\to s$ data to be new physics, there is a priori no reason to believe that - in the effective field theory language - only one type of operator is responsible for the tensions. We thus perform for the first time a global fit where all the Wilson coefficients which can effectively receive new physics contributions are considered, allowing for lepton flavour universality breaking effects as well as contributions from chirality flipped and scalar and pseudoscalar operators, and find the SM pull taking into account all effective parameters. As a result of the full fit to all available $b\to s$ data including all relevant Wilson coefficients, we obtain a total pull of 4.1$\sigma$ with the SM hypothesis assuming 10% error for the power corrections. Moreover, we make a statistical comparison to find whether the most favoured explanation of the anomalies is new physics or underestimated hadronic effects using the most general parameterisation which is fully consistent with the analyticity structure of the amplitudes. This Wilks' test will be a very useful tool to analyse the forthcoming $B\to K^{\ast }{\mu }^{+}{\mu }^{-}$ data. Because the significance of the observed tensions in the angular observables in $B\to K^{\ast }{\mu }^{+}{\mu }^{-}$ is presently dependent on the theory estimation of the hadronic contributions to these decays, we briefly discuss the various available approaches for taking into account the long-distance hadronic effects and examine how the different estimations of these contributions result in distinct significance of the new physics interpretation of the observed anomalies.

20 pages, 7 figures. v2: $F_H(B^{+}\to K^{+}{\mu }^{+}{\mu }^{-})$ added to the global fit (with no significant change in the results), references added. v3: typos corrected

References in corpus (23)

• Test of lepton universality using $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• Test of lepton universality with $B^0\to K^{\ast 0}{\ell }^{+}{\ell }^{-}$ decays
• SuperIso v3.0: A program for calculating flavor physics observables in 2HDM and supersymmetry
• Patterns of New Physics in $b\to s{\ell }^{+}{\ell }^{-}$ transitions in the light of recent data
• Flavour anomalies after the $R_{K^{\ast }}$ measurement
• SuperIso: A program for calculating the isospin asymmetry of B -> K* gamma in the MSSM
• Interpreting Hints for Lepton Flavor Universality Violation
• Towards the discovery of new physics with lepton-universality ratios of $b\to s\ell \ell$ decays
• On the impact of power corrections in the prediction of B->K*mu+mu- observables
• $R_K$ and $R_{K^{\ast }}$ beyond the Standard Model
• Angular analysis of $B_d^0\to K^{\ast }{\mu }^{+}{\mu }^{-}$ decays in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Long-distance effects in $B\to K^{\ast }\ell \ell$ from Analyticity
• New observables in the decay mode anti-B --> anti-K*0 l+ l-
• Global fits to b -> s ll data and signs for lepton non-universality
• $D\to K,l\nu$ Semileptonic Decay Scalar Form Factor and $|V_{cs}|$ from Lattice QCD
• New physics reach of the decay mode $\bar{B}\to {\bar{K}}^{\ast 0}{\ell }^{+}{\ell }^{-}$
• On lepton non-universality in exclusive $b\to s\ell \ell$ decays
• Large hadronic power corrections or new physics in the rare decay B-->K* mu+ mu- ?
• Measurement of the ratio of branching fractions BR(B0 -> K*0 gamma)/BR(Bs0 -> phi gamma) and the direct CP asymmetry in B0 -> K*0 gamma
• An empirical model of the long-distance contributions to ${\bar{B}}^0\to {\bar{K}}^{\ast 0}{\mu }^{+}{\mu }^{-}$ transitions
• Supersymmetric constraints from Bs -> mu+mu- and B -> K* mu+mu- observables
• Direct determination of Wilson coefficients using $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ decays
• Towards establishing Lepton Flavour Universality violation in $\bar{B}\to {\bar{K}}^{\ast }{\ell }^{+}{\ell }^{-}$ decays

Cited by in corpus (41)

• B-decay discrepancies after Moriond 2019
• Review of Lepton Universality tests in B decays
• New Physics in $b\to s{\ell }^{+}{\ell }^{-}$ confronts new data on Lepton Universality
• Update on the b->s anomalies
• Non-local matrix elements in $B_{(s)}\to \{K^{(\ast )},\varphi \}{\ell }^{+}{\ell }^{-}$
• $b\to s\ell \ell$ Global Fits after $R_{K_S}$ and $R_{K^{\ast +}}$
• Lessons from the $B^{0,+}\to K^{\ast 0,+}{\mu }^{+}{\mu }^{-}$ angular analyses
• More Indications for Lepton Nonuniversality in $b\to s{\ell }^{+}{\ell }^{-}$
• Complete Vector-like Fourth Family and new $\mathrm{U}(1{)}^{\prime }$ for Muon Anomalies
• Implications for New Physics in $b\to s\mu \mu$ transitions after recent measurements by Belle and LHCb
• Dispersive Analysis of $B\to K^{(\ast )}$ and $B_s\to \varphi$ Form Factors
• The impact of flavour data on global fits of the MFV SMEFT
• Unveiling Hidden Physics at the LHC
• The Flavor of UV Physics
• Are we overlooking Lepton Flavour Universal New Physics in $b\to s\ell \ell$ ?
• On the new LHCb angular analysis of $B\to K^{\ast }{\mu }^{+}{\mu }^{-}$: Hadronic effects or New Physics?
• Flavor Anomalies in Heavy Quark Decays
• On the significance of new physics in $b\to s{\ell }^{+}{\ell }^{-}$ decays
• Complete Vector-like Fourth Family with ${\mathrm{U}(1)}^{\prime }$: A Global Analysis
• Leptoquark Option for $B$-meson Anomalies and Leptonic Signatures
• New physics in $b\to s\ell \ell$ decays with complex Wilson coefficients
• Exhaustive Model Selection in $b\to s\ell \ell$ Decays: Pitting Cross-Validation against AIC${}_c$
• Flavor anomalies from asymptotically safe gravity
• Angular analysis of the rare decay ${\Lambda }_b\to \Lambda (1520)(\to NK){\ell }^{+}{\ell }^{-}$
• What $R_K$ and $Q_5$ can tell us about New Physics in $b\to s\ell \ell$ transitions?
• $B$ anomalies under the lens of electroweak precision
• Flavour anomalies from a split dark sector
• Flavour-changing neutral scalar interactions of the top quark
• Probing New Physics in $b\to d$ Transitions
• Model independent analysis of the angular observables in $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ and $B^{+}\to K^{\ast +}{\mu }^{+}{\mu }^{-}$
• Data-driven analyses and model-independent fits for present $b\to s\ell \ell$ results
• Isospin extrapolation as a method to study inclusive $\bar{B}\to X_s{\ell }^{+}{\ell }^{-}$ decays
• Anomalous gauge couplings vis-$\grave{a}$-vis $(g-2{)}_{\mu }$ and flavor observables
• Search for opposite sign muon-tau pair and a b-jet at LHC in the context of flavor anomalies
• Implication of Z-mediated FCNC on semileptonic decays $B_s\to \varphi l^{+}{l}^{-}$ and $B^{+}\to K^{+}{l}^{+}{l}^{-}$
• Theoretical Review of Rare B Decays
• Recent progress in decays of $b$ and $c$ hadrons
• Flavour Physics with SuperIso
• $\ge 4\mu$ signal from a vector-like lepton decaying to a muon-philic $Z^{\prime }$ boson at the LHC
• Searching for New Physics with $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$
• Right-handed Currents Searches and Parity Doubling