More Model-Independent Analysis of b->s Processes

Abstract

We study model-independently the implications of non-standard scalar and pseudoscalar interactions for the decays b ->s gamma, b -> s g, b -> s l^+l^- (l=e,mu) and B_s -> mu^+ mu^-. We find sizeable renormalization effects from scalar and pseudoscalar four-quark operators in the radiative decays and at O(alpha_s) in hadronic b decays. Constraints on the Wilson coefficients of an extended operator basis are worked out. Further, the ratios R_H = BR(B -> H mu^+ mu^-)/BR(B -> H e^+ e^-), for H=K^(*), X_s, and their correlations with B_s -> mu^+ mu^- decay are investigated. We show that the Standard Model prediction for these ratios defined with the same cut on the dilepton mass for electron and muon modes, R_H= 1 + O(m^2_mu/m^2_b), has a much smaller theoretical uncertainty (<1%) than the one for the individual branching fractions. The present experimental limit R_K < 1.2 puts constraints on scalar and pseudoscalar couplings, which are similar to the ones from current data on BR(B_s -> mu^+ mu^-). We find that new physics corrections to R_{K*} and R_{X_s} can reach 13% and 10%, respectively.

28 pages, 6 figures; Table 1 updated, two refs added (to appear in PRD)

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• Dimuon CP Asymmetry in B Decays and Wjj Excess in Two Higgs Doublet Models
• Towards establishing Lepton Flavour Universality violation in $\bar{B}\to {\bar{K}}^{\ast }{\ell }^{+}{\ell }^{-}$ decays
• Implications of light $Z^{\prime }$ on semileptonic $B(B_s)\to T\{K_2^{\ast }(1430)$ $(f_2^{\prime }(1525))\}{\ell }^{+}{\ell }^{-}$ decays at large recoil
• Search for Rare $b\to d{\ell }^{+}{\ell }^{-}$ Transitions at Belle
• Dark Matter and Collider Phenomenology with two light Supersymmetric Higgs Bosons
• Impact of electroweak group representation in models for $B$ and $g-2$ anomalies from Dark Loops
• New Physics in $b\to s\ell \ell$ anomalies and its implications for the complementary neutral current decays
• Measurement of the branching fraction ratio $R_K$ at large dilepton invariant mass
• Model-independent analysis on $R(K^{(\ast )})$
• New physics in $\text{b}\to \text{s}$ transitions in the MF331 model
• Electroweak Penguin Decays of $b$-Flavoured Hadrons
• Dark matter and Collider signals in supersymmetric $U(1{)}^{\prime }$ models with non-universal $Z^{\prime }$ couplings
• Custodial bulk Randall-Sundrum model and B->K* l+ l'-
• Linking the $R_{K^{(\ast )}}$ anomalies to the Hubble tension via a single right-handed neutrino
• Rare nonleptonic ${\bar{B}}_s^0$ decays as probes of new physics behind $b\to s\mu \bar{\mu }$ anomalies
• Explaining $g_{\mu }-2$ and $R_{K^{(\ast )}}$ using the light mediators of $U(1{)}_{T3R}$
• Muon $g-2$ and semileptonic $B$ decays in Bélanger-Delaunay-Westhoff model with gauge kinetic mixing
• A unique discrimination between new physics scenarios in $b\to s{\mu }^{+}{\mu }^{-}$ anomalies
• Neutrinophilic DM annihilation in a model with $U(1{)}_{L_{\mu }-L_{\tau }}\times U(1{)}_H$ gauge symmetry
• Determination of mass hierarchy with ${\nu }_{\mu }\to {\nu }_{\tau }$ appearance and the effect of nonstandard interactions
• Tension between scalar/pseudoscalar new physics contribution to B_s --> mu+ mu- and B --> K mu+ mu-
• Rare radiative leptonic B-decays
• Investigating New Physics through the Observables of Semileptonic $B_s\to K^{\ast }(\to K\pi ){\mu }^{+}{\mu }^{-}$ Decay
• Fermionic Singlet Dark Matter in One-Loop Solutions to the $R_K$ Anomaly: A Systematic Study
• Rare decays of b hadrons
• Relations between $b\to c\tau \nu$ Decay Modes in Scalar Models
• A multi-charged particle model with local $U(1{)}_{\mu -\tau }$ to explain muon $g-2$, flavor physics, and possible collider signature
• Search for opposite sign muon-tau pair and a b-jet at LHC in the context of flavor anomalies
• Using Machine Learning techniques in phenomenological studies in flavour physics
• Magnetic-dipole corrections to $R_K$ and $R_{K^{\ast }}$ in the Standard Model and Dark Photon scenarios
• Interpreting B-anomalies within an extended 331 gauge theory
• Probing B-Anomalies via Dimuon Tails at a Future Collider
• Theoretical Status of Rare B Decays with Muons
• B meson decay anomaly with a non-universal U(1)' extension
• New physics in $b\to s{e}^{+}{e}^{-}$: A model independent analysis
• Implications for new physics from ${\bar{B}}^0\to {\pi }^0{\pi }^0$ and ${\bar{B}}^0\to {\bar{K}}^0{K}^0$
• Branching Fraction of the Decay $B^{+}\to {\pi }^{+}{\tau }^{+}{\tau }^{-}$ and Lepton Flavor Universality Test via the Ratio $R_{\pi }(\tau /\mu )$
• Test of lepton flavour universality with $B^{+}\to K^{+}{\pi }^{+}{\pi }^{-}{\ell }^{+}{\ell }^{-}$ decays
• Flavor signatures of complex anomalous $tcZ$ couplings
• Explaining the $b\to s{\ell }^{+}{\ell }^{-}$ anomalies in $Z^{\prime }$ scenarios with top-FCNC couplings
• Electroweak Precision Data and Gravitino Dark Matter
• Impact on $L$-observables of a new combined analysis of $B_{d,s}\to K^{(\ast )}$ form factors
• A gauged non-universal $U(1{)}_X$ model to study muon $g-2$ and $B$ meson anomalies
• Manifestation of Lepton Interaction Nonuniversality in Spontaneously Violated Mirror Symmetry
• Testing spin-2 mediator by angular observables in $b\to s{\mu }^{+}{\mu }^{-}$
• $R(K^{(\ast )})$ with vector unparticles
• ${\Lambda }_b\to \Lambda (\to p{\pi }^{-}){\ell }^{+}{\ell }^{-}$ as probe of CP-violating New Physics
• $\frac{|V_{ub}|}{|V_{cb}|}$ and Quest for New Physics
• Reappraisal of the minimal flavoured $Z^{\prime }$ scenario
• Precision Tests in $b\to s{\ell }^{+}{\ell }^{-}$ ($\ell =e,\mu$) at FCC-ee
• Theoretical Review of Rare B Decays
• Prospects for rare B decays at Belle II
• Rare b-hadron decays as probe of new physics
• Flavour Physics with SuperIso
• B-Anomalies from flavorful U(1)' extensions, safely
• Round table on Standard Model Anomalies
• Is there really a $W\to \tau \nu$ puzzle?
• Recent progress in decays of $b$ and $c$ hadrons
• Distinguishing the right-handed up/charm quarks from top quark via discrete symmetries in the standard model extensions
• Addressing the $R_{\tau /\mu ,e}\left(D^{(\ast )}\right)$ puzzle through New Physics four-fermion operators and their impact on ${\Lambda }_b\to {\Lambda }_c\tau {\bar{\nu }}_{\tau }$ decay
• CKM Parameters and Rare B Decays
• A flavor-safe composite explanation of $R_K$
• Radiative and Leptonic B-meson Decays from the B-factories
• Probing new physics through B->K l+ l- decays in R-parity violating minimal supersymmetric standard model
• Associated Production of Different Flavor Heavy Quarks Through $W^{\prime }$ Bosons at the LHC
• A Search for pair production of the LSP $\widetilde{{\nu }_{\tau }}$ at the CLIC via RPV Decays
• The Angular Observables of ${\Lambda }_b\to {\Lambda }_c(\to {\Lambda }^0{\pi }^{+}){\tau }^{-}(\to {\pi }^{-}{\nu }_{\tau }){\bar{\nu }}_{\tau }$ within the Paradigm of FCCC Anomalies
• Probing mixed-state dark matter and flavor observables in a scalar-assisted baryonic gauge theory
• Flavour Physics at LHCb -- 50 years of the KM paradigm
• Form factors and differential distributions in rare radiative leptonic B-decays
• SUSY beyond minimal flavour violation
• Imprints of flavor anomalies on neutrino oscillations through dark matter halo
• Leptoquarks with Exactly Stable Protons
• 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
• Diagnosing New Physics with LUV and LFV B Decays