Phenomenology of non-standard Z couplings in exclusive semileptonic b -> s transitions

Abstract

The rare decays $B\to K^{(\ast )}{\ell }^{+}{\ell }^{-}$, $B\to K^{(\ast )}\nu \bar{\nu }$ and $B_s\to {\mu }^{+}{\mu }^{-}$ are analyzed in a generic scenario where New Physics effects enter predominantly via $Z$ penguin contributions. We show that this possibility is well motivated on theoretical grounds, as the $\bar{s}bZ$ vertex is particularly susceptible to non-standard dynamics. In addition, such a framework is also interesting phenomenologically since the $\bar{s}bZ$ coupling is rather poorly constrained by present data. The characteristic features of this scenario for the relevant decay rates and distributions are investigated. We emphasize that both sign and magnitude of the forward-backward asymmetry of the decay leptons in $\bar{B}\to {\bar{K}}^{\ast }{\ell }^{+}{\ell }^{-}$, ${\mathcal{A}}_{FB}^{(\bar{B})}$, carry sensitive information on New Physics. The observable ${\mathcal{A}}_{FB}^{(\bar{B})}+{\mathcal{A}}_{FB}^{(B)}$ is proposed as a useful probe of non-standard CP violation in $\bar{s}bZ$ couplings.

Minor modifications; version to appear in Phys. Rev. D

References in corpus (14)

• A Comparative Study of the Decays $B\to (K,K^{\ast }){\ell }^{+}{\ell }^{-}$ in Standard Model and Supersymmetric Theories
• Photonic penguins at two loops and m_t-dependence of BR[ B -> X_s l^+ l^-]
• Flavor Changing Effects in Theories with a Heavy Z' Boson with Family Non-Universal Couplings
• B -> Xs l+ l- decays in supersymmetry
• Trojan Penguins and Isospin Violation in Hadronic B Decays
• Exclusive semileptonic rare decays $B-{>}_{(}$K,K^*) \ell^+ \ell^- in supersymmetric theories
• Further Search for the Decay K^+ --> pi^+ nu nubar
• Search for the Flavor-Changing Neutral Current Decays B^+ -> mu^+ mu^- K^+ and B^0 -> mu^+ mu^-K^{*0}
• Anomalous Couplings of the Third Generation in Rare B Decays
• New Physics Effects in $B\to K^{(}\ast )\nu \nu$ Decays
• The $B\to X_s{l}^{+}{l}^{-}$ and $B\to X_s\gamma$ decays with the fourth generation
• Fourth generation effects in rare exclusive B -> K^* l^+ l^- decay
• Flavour-Conserving CP Phases in Supersymmetry and Implications for Exclusive B Decays
• CP Violation in rare semileptonic B decays and supersymmetry

Cited by in corpus (133)

• Symmetries and Asymmetries of B -> K* mu+ mu- Decays in the Standard Model and Beyond
• Flavor Structure of Warped Extra Dimension Models
• $R_K$ and future $b\to s\ell \ell$ BSM opportunities
• New physics in $b\to s$ transitions after LHC run 1
• Anatomy of Prominent B and K Decays and Signatures of CP-Violating New Physics in the Electroweak Penguin Sector
• B -> pi pi, New Physics in B -> pi K and Implications for Rare K and B Decays
• Search for B --> K(*) nu nubar and invisible quarkonium decays
• Measurements of branching fractions, rate asymmetries, and angular distributions in the rare decays B --> Kl+l- and B --> K*l+l-
• Theory of B -> K(*)l+l- decays at high q^2: OPE and quark-hadron duality
• The Impact of Universal Extra Dimensions on the Unitarity Triangle and Rare K and B Decays
• Effects of mixing with quark singlets
• Rare K and B Decays in a Warped Extra Dimension with Custodial Protection
• Measurement of angular parameters from the decay ${\mathrm{B}}^0\to {\mathrm{K}}^{\ast 0}{\mu }^{+}{\mu }^{-}$ in proton-proton collisions at $\sqrt{s}=$ 8 TeV
• Leptoquark Flavor Patterns & B Decay Anomalies
• Angular analysis of the decay B0 to K*0 mu mu from pp collisions at sqrt(s) = 8 TeV
• 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
• More Benefits of Semileptonic Rare B Decays at Low Recoil: CP Violation
• Rare $B$ Decays as Tests of the Standard Model
• Search for Dark Matter in b -> s Transitions with Missing Energy
• Towards the Identification of New Physics through Quark Flavour Violating Processes
• Constraints on New Physics in MFV models: a model-independent analysis of Delta F=1 processes
• Z' Mediated Flavor Changing Neutral Currents in B Meson Decays
• Vanishing Minors in the Neutrino Mass Matrix from Abelian Gauge Symmetries
• Quark flavour mixing with right-handed currents: an effective theory approach
• How much space is left for a new family?
• Search for B -> h(*) nu nubar with the full Belle Y(4S) data sample
• Model-independent constraints on new physics in b --> s transitions
• QCD Corrections to B -> X_{d,s} nu nubar, B_{d,s} -> l^+l^-, K -> pi nu nubar and K_L -> mu^+ mu^- in the MSSM
• B, D and K decays
• New Vector-Like Fermions and Flavor Physics
• Analysis of the $Λ_{b}\rar Λ\ell^+\ell^- $ decay in QCD
• Dark matter pair-production in b -> s transitions
• Waiting for Precise Measurements of K^+->pi^+ nu nu and K_L->pi^0 nu nu
• Forward-backward and isospin asymmetry for B -> K* l+ l- decay in the standard model and in supersymmetry
• $b\to s$ Transitions in Family-dependent $U(1{)}^{\prime }$ Models
• Constraints on flavor-changing Z' models by B_s mixing, Z' production, and B_s -> μ^+ μ^-
• Exclusive $B\to K^{(\ast )}{\ell }^{+}{\ell }^{-}$, $B\to K^{(\ast )}\nu \bar{\nu }$ and $B\to K^{\ast }\gamma$ transitions in a scenario with a single Universal Extra Dimension
• Direct CP violation in charm and flavor mixing beyond the SM
• Upper Bounds on Rare K and B Decays from Minimal Flavour Violation
• Angular analysis and branching fraction measurement of the decay B0 to K*0 mu+ mu-
• The B -> pi K Puzzle and its Relation to Rare B and K Decays
• Solving the strong CP problem with supersymmetry
• New Physics in b -> s mu+ mu-: CP-Violating Observables
• On $D\to X_u{l}^{+}{l}^{-}$ within the Standard Model and Frameworks like the Littlest Higgs Model with T Parity
• B \to K(K^*) missing energy in Unparticle physics
• Constraining models with vector-like fermions from FCNC in K and B physics
• First hint of non-standard CP violation from B --> Phi K_S decay
• Precision Flavour Physics with $B\to K\nu \bar{\nu }$ and $B\to K{l}^{+}{l}^{-}$
• Search for B -> h(*) nu nubar Decays at Belle
• K^+ -> pi^+ nu nu-bar and K_L -> pi^0 nu nu-bar Decays in the General MSSM
• Supersymmetric constraints from Bs -> mu+mu- and B -> K* mu+mu- observables
• B_s -> mu^+ mu^- and B -> X_s mu^+ mu^- in MSSM
• Light cone QCD sum rules study of the semileptonic heavy ${\Xi }_Q$ and ${\Xi }_Q^{\prime }$ transitions to $\Xi$ and $\Sigma$ baryons
• Search for the Rare Decay B->K nu nubar
• Rare meson decays into very light neutralinos
• A search for the decay $B^{+}\to K^{+}\nu \bar{\nu }$
• Semileptonic Form-factors from B-> K* gamma Decays in the Large Energy Limit
• New Aspects of B -> pi pi, pi K and their Implications for Rare Decays
• $K^{+}\to {\pi }^{+}\nu \bar{\nu }$: a rising star on the stage of flavour physics
• More Synergies from Beauty, Top, $Z$ and Drell-Yan Measurements in SMEFT
• Strong-weak CP hierarchy from non-renormalization theorems
• Searching for $Z^{{}^{\prime }}$ Gauge Boson in an Anomaly-Free U(1)${}^{\prime }$ Gauge Family Model
• Beautiful Mirrors, Unification of Couplings and Collider Phenomenology
• Disentangling new physics in $K\to \pi \bar{\nu }\nu$ and $B\to K(K^{\ast })\bar{\nu }\nu$ observables
• Rare semileptonic decays of B and B_c mesons in the relativistic quark model
• New physics effects on the CP asymmetries in B -> phi K_S and B -> eta' K_S decays
• Charged-Higgs Collider Signals with or without Flavor
• B_s -> phi rho^0 and B_s -> phi pi^0 as a handle on isospin-violating New Physics
• FCNC $B_s$ and ${\Lambda }_b$ transitions: Standard Model versus a single Universal Extra Dimension scenario
• Radiative and Semileptonic B Decays Involving the Tensor Meson K_2^*(1430) in the Standard Model and Beyond
• Analysis of the rare semileptonic $B_c \rar P(D,D_s) l^{+}l^{-}/ν\barν$ decays within QCD sum rules
• Manifestations of Warped Extra Dimension in Rare Charm Decays and Asymmetries
• Z-mediated charge and CP asymmetries and FCNCs in $B_{d,s}$ processes
• Implications of the non-universal Z boson in FCNC mediated rare decays
• BR(Bs to mu+ mu-) as an electroweak precision test
• Rare b hadron decays at the LHC
• Rare ${\Lambda }_b\to \Lambda l^{+}{l}^{-}$ and ${\Lambda }_b\to \Lambda \gamma$ decays in the relativistic quark model
• Rare $B_s$ decays to $\eta$ and ${\eta }^{\prime }$ final states
• Exclusive B-> M ν\barν (M= π, K, ρ, K^*) Decays and Leptophobic Z^\prime Model
• Flavour Theory: 2009
• Search for B --> K* nu anti-nu decays
• $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ Forward-backward Asymmetry and New Physics
• Disentangling left and right-handed neutrino effects in $B\to K^{(\ast )}\nu \nu$
• Precision flavour physics with $B\to K\nu \bar{\nu }$ and $B\to K{l}^{+}{l}^{-}$
• Flavor Physics and CP Violation
• Squark Flavor Implications from B --> K(*) l+ l-
• Rare $B_s$ decays in the relativistic quark model
• Flavor and CP violating Z exchange and the rate asymmetry in B --> phi K_S
• Investigation of the ${\Lambda }_b\to \Lambda {\ell }^{+}{\ell }^{-}$ transition in universal extra dimension using form factors from full QCD
• Contributions to $ZZ{V}^{\ast }$ ($V=\gamma ,Z,Z^{\prime }$) couplings from $CP$ violating flavor changing couplings
• Effect of FCNC mediated Z boson on lepton flavor violating decays
• Radiative Corrections to Higgs Masses in $Z^{\prime }$ Models
• Rare decays: theory vs. experiments
• Weinberg's Higgs portal confronting recent LUX and LHC results together with upper limits on B^+ and K^+ decay into invisibles
• b\to sν\barν decay in the MSSM: Implication of b\to sγat large tan beta
• Covariant Description of Flavor Conversion in the LHC Era
• Unparticle physics effects in (Lambda_b -> Lambda + missing energy) processes
• Revisiting $B\to K^{\ast }(\to K\pi )\nu \bar{\nu }$ decays
• Flavor-changing interactions with singlet quarks and their implications for the LHC
• QCD sum rules analysis of the rare $B_c \rar Xν\barν$ decays
• Rare Semileptonic $B_s$ Decays to $\eta$ and ${\eta }^{\prime }$ mesons in QCD
• Rare ${\Lambda }_c$ decays and new physics effects
• Rare B decays in a single Universal Extra Dimension scenario
• Physics Opportunities at the Next Generation of Precision Flavor Physics
• Radiative and Electroweak Rare B Decays
• Asymmetry Parameter of the $K_1(1270,1400)$ by Analyzing the $B\to K_1\nu \bar{\nu }$ Transition Form Factors within QCD
• Studying Exclusive Semi-leptonic $b\to (s,d)\nu \bar{\nu }$ Decays in the MSSM without R-parity
• CP violation in the $B\to K{\ell }^{+}{\ell }^{-}$ decay
• Investigation of rare semileptonic $B_c$ decays into $(D_{(}s,d{)}^{(}(\ast ))){\mu }^{+}{\mu }^{-}$ decays with non-universal $Z^{\prime }$ effect
• Towards a Generic Parametrisation of "New Physics" in Quark-Flavour Mixing
• Rare decays B\to Mν\barν in the TC2 model and the LHT model
• Fourth generation effects on the rare $B\to K^{\ast }\nu \bar{\nu }$ decay
• Rare K decays in a model of quark and lepton masses
• The effects of enhanced Z penguins on lepton polarizations in $B\to X_s{\ell }^{+}{\ell }^{-}$
• $CP$ violation in the $HZZ$ vertex and left-right asymmetries
• Flavor Changing Neutral Currents Transition of the ${\Sigma }_Q$ to Nucleon in Full QCD and Heavy Quark Effective Theory
• Messages on Flavour Physics Beyond the Standard Model
• Non-diagonal contributions to $Z\gamma V^{\ast }$ vertex, polarizations and bounds on $Z\overline{t}q$ couplings
• Theoretical Status of Rare B Decays with Muons
• CP violation in the radiative dileptonic B-meson decays
• B \to 0^{+}(1^{+}) + missing energy in Unparticle Physics
• Waiting for Clear Signals of New Physics in B and K Decays
• Leptonic B decays at BaBar
• QCD and Heavy Hadron Decays
• Semileptonic neutral current decays of ${\Xi }_b$ with dileptons or dineutrinos in the final state
• Family nonuniversal Z-prime and b to s Gamma decay
• Baryons and baryoniums in the perspective of QCD sum rules
• A composite Froggatt-Nielsen model of flavor
• Standard Model CP violation in B->X_d \ell^+\ell^- decays
• $c\to u\nu \bar{\nu }$ transitions of $B_c$ mesons: 331 model facing Standard Model null tests
• The asymmetries of the $B\to K^{\ast }{\mu }^{+}{\mu }^{-}$ decay and the search of new physics beyond the Standard Model
• Radiative and Leptonic B-meson Decays from the B-factories
• Rare Decays at B Factories