$B\to K^{\ast }{l}^{+}{l}^{-}$, $K{l}^{+}{l}^{-}$ decays in a family non-universal $Z^{\prime }$ model

Abstract

Motivated by the observed forward-backward asymmetry in $B\to K^{\ast }{l}^{+}{l}^{-}$ decay, we perform a detailed analysis of this decay mode within a family non-universal $Z^{\prime }$ model. With the related coupling $Z^{\prime }-\bar{s}b$ constrained by ${\bar{B}}_s-B_s$ mixing, $B\to \pi K$, and $B\to X_s{\mu }^{+}{\mu }^{-}$ decays, we look for further constraint on the couplings $Z^{\prime }-{\mu }^{+}{\mu }^{-}$ from $A_{FB}(B\to K^{\ast }{\mu }^{+}{\mu }^{-}{)}_{0{\mathrm{GeV}}^2⩽q^2⩽2{\mathrm{GeV}}^2}$ and get numerically $B_{\mu \mu }^{L,R}\sim \mathcal{O}(10^{-2})$. Moreover, we find that the relations, $B_{\mu \mu }^L<B_{\mu \mu }^R$ and $B_{\mu \mu }^L+B_{\mu \mu }^R<0$, with a small negative ${\varphi }_s^L$, are crucial to moderate the discrepancy for $A_{FB}(B\to K^{\ast }{\mu }^{+}{\mu }^{-})$ between the SM prediction and the experimental data. Numerically, comparing with the SM prediction, we find that $A_{FB}(B\to K^{\ast }{\mu }^{+}{\mu }^{-}{)}_{0{\mathrm{GeV}}^2⩽q^2⩽2{\mathrm{GeV}}^2}$ could be enhanced about 80% and 50% by $Z^{\prime }$ contribution at most in scenarios S1 and S2, corresponding to the two fitted results of ${\varphi }_s$ by UTfit collaboration, respectively. However, the results are still about $1.5\sigma$ lower than the experimental measurement.

20 pages, 3 figures. To appear in JHEP

References in corpus (10)

• Measurement of the Differential Branching Fraction and Forward-Backword Asymmetry for B->K(*)l+l-
• Family Non-universal $U(1{)}^{\prime }$ Gauge Symmetries and $b\to s$ Transitions
• Penguins with Charm and Quark-Hadron Duality
• $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ in soft-collinear effective theory
• New-physics contributions to the forward-backward asymmetry in B -> K* mu+ mu-
• Probe R-parity Violating Supersymmetry Effects in $B\to K^{(\ast )}{\ell }^{+}{\ell }^{-}$ and $B_s\to {\ell }^{+}{\ell }^{-}$ Decays
• $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ Forward-backward Asymmetry and New Physics
• CP phase of nonuniversal $Z^{\prime }$ on $\sin {\varphi }_s^{J/\Psi \varphi }$ and T-odd observables of ${\bar{B}}_q\to V_q{\ell }^{+}{\ell }^{-}$
• Precision flavour physics with $B\to K\nu \bar{\nu }$ and $B\to K{l}^{+}{l}^{-}$
• New Physics from Flavour

Cited by in corpus (33)

• On B -> V l l at small dilepton invariant mass, power corrections, and new physics
• Family non-universal Z' models with protected flavor-changing interactions
• 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
• Angular analysis of the decay B0 to K*0 mu mu from pp collisions at sqrt(s) = 8 TeV
• The Anatomy of Z' and Z with Flavour Changing Neutral Currents in the Flavour Precision Era
• LHCb anomaly and $B$ physics in flavored Z${}^{\prime }$ models with flavored Higgs doublets
• Angular analysis and branching fraction measurement of the decay B0 to K*0 mu+ mu-
• Impact of the $b\to sll$ anomalies on dark matter physics
• Branching ratios, forward-backward asymmetries and angular distributions of $B\to K_2^{\ast }{l}^{+}{l}^{-}$ in the standard model and new physics scenarios
• B -> K1 l^+l^- Decays in a Family Non-universal Z' Model
• Probe a family non-universal Z' boson effects in B(s)-> phi mu(+) mu(-)decay
• Constraints on $Z^{\prime }$ Boson within Minimal Flavor Violation
• Flavoured gauge extension of singlet-doublet fermionic dark matter: neutrino mass, high scale validity and collider signatures
• A global analysis of $b\to s\ell \ell$ data in heavy and light $Z^{\prime }$ models
• $B_s^0-{\bar{B}}_s^0$ mixing in a family non-universal $Z^{\prime }$ model revisited
• Axigluon on like-sign charge asymmetry ${\mathcal{A}}_{s\ell }^b$, FCNCs and CP asymmetries in B decays
• Semileptonic Transition of $Σ_b \rar Σμ^+ μ^-$ in Family Non-universal $Z^{\prime }$ Model
• Implications of Family Nonuniversal $Z^{\prime }$ Model on B -->K_0^* pi Decays
• Study of Bs-> ϕl^+ l^-$ Decay in a Single Universal Extra Dimension
• The effects of a family non-universal Z-prime boson on B--->pipi decays
• Constraints on anomalous $tcZ$ coupling from $\bar{B}\to {\bar{K}}^{\ast }{\mu }^{+}{\mu }^{-}$ and $B_s\to {\mu }^{+}{\mu }^{-}$ decays
• Implication of family non-universal $Z^{\prime }$ model to rare exclusive $b\to s(l\bar{l},\nu \bar{\nu })$ transitions
• Predictions for $B_s\to {\bar{K}}^{\ast }\ell \ell$ in non-universal $Z^{\prime }$ models
• Constraints on a New Light Spin-One Particle from Rare b -> s Transitions
• Impact of $b\to s\ell \ell$ anomalies on rare charm decays in non-universal $Z^{\prime }$ models
• Revisiting B_s\toμ^+μ^- and B\to K^{(*)}μ^+μ^- decays in the MSSM with and without R-parity
• Model-independent analysis on $R(K^{(\ast )})$
• Investigation of rare semileptonic $B_c$ decays into $(D_{(}s,d{)}^{(}(\ast ))){\mu }^{+}{\mu }^{-}$ decays with non-universal $Z^{\prime }$ effect
• Effects of neutral $Z^{\prime }$ boson in $B_s\to \varphi {\ell }^{+}{\ell }^{-}$ decay with polarized $\varphi$ and the unpolarized and polarized $CP$ violation asymmetry
• Implication of the Fourth Generation Standard Model to the Lepton Polarization asymmetries in the $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ Decay
• Analysis of Angular Observables of ${\Lambda }_b\to \Lambda (\to p\pi ){\mu }^{+}{\mu }^{-}$ Decay in Standard and $Z^{\prime }$ Models
• $R(K^{(\ast )})$ with vector unparticles
• Investigating the Effect of Family Non-universal $Z^{\prime }$ Boson in $B\to \varphi \varphi$ Decay