$B_s^0-{\bar{B}}_s^0$ mixing in a family non-universal $Z^{\prime }$ model revisited

Abstract

Motivated by the very recent measurements performed at the LHCb and the Tevatron of the $B_s^0-{\bar{B}}_s^0$ mixing, in this paper we revisit it in a family non-universal $Z^{\prime }$ model, to check if a simultaneous explanation for all the mixing observables, especially for the like-sign dimuon charge asymmetry observed by the D0 collaboration, could be made in such a specific model. In the first scenario where the $Z^{\prime }$ boson contributes only to the off-diagonal element $M_{12}^s$, it is found that, once the combined constraints from $\Delta M_s$, ${\varphi }_s$ and $\Delta {\Gamma }_s$ are imposed, the model could not explain the measured flavour-specific CP asymmetry $a_{fs}^s$, at least within its $1\sigma$ ranges. In the second scenario where the NP contributes also to the absorptive part ${\Gamma }_{12}^s$ via tree-level $Z^{\prime }$-induced $b\to c\bar{c}s$ operators, we find that, with the constraints from $\Delta M_s$, ${\varphi }_s$ and the indirect CP asymmetry in ${\bar{B}}_d\to J/\psi K_S$ taken into account, the present measured $1\sigma$ experimental ranges for $a_{fs}^s$ could not be reproduced too. Thus, such a specific $Z^{\prime }$ model with our specific assumptions could not simultaneously reconcile all the present data on $B_s^0-{\bar{B}}_s^0$ mixing. Future improved measurements from the LHCb and the proposed superB experiments, especially of the flavour-specific CP asymmetries, are expected to shed light on the issue.

30 pages, 6 figures, 1 table, pdflatex; accepted by JHEP

References in corpus (16)

• Direct Limits on the Bs Oscillation Frequency
• Measurement of $\boldmath {B_s^0}$ mixing parameters from the flavor-tagged decay
• Measurement of the CP-violating phase phi_s in the decay Bs->J/psi phi
• Probing New Physics through B Mixing: Status, Benchmarks and Prospects
• Constraints on flavor-changing Z' models by B_s mixing, Z' production, and B_s -> μ^+ μ^-
• Delta F = 2 observables and B -> X_q gamma decays in the Left-Right Model: Higgs particles striking back
• Measurement of the B^0_s - \bar{B}^0_s oscillation frequency Delta m_s in B^0_s -> D_s^-(3) pi decays
• Comment on new physics contributions to Gamma_{12}^s
• Probing Leptonic Interactions of a Family-Nonuniversal Z' Boson
• Neutral Gauge Boson Contributions to the Dimuon Charge Asymmetry in B Decays
• Annihilation-Type Charmless Radiative Decays of B Meson in Non-universal Z^\prime Model
• Anomalous CP-Violation in B_s-Bbar_s Mixing Due to a Light Spin-One Particle
• The Prediction of Mass of Z'-Boson from $b_q^0-b_q^{0}bar$ Mixing
• B_s^0-\bar{B}_s^0 mixing and B -> πK decays in stringy leptophobic Z^\prime
• Effect of both Z and Z'-mediated flavor-changing neutral currents on the baryonic rare decay $lambd{a}_b$ decays into $lambda{l}^{+}{l}^{-}$
• Effect of Z'-mediated flavor-changing neutral current on B decays into Pi Pi

Cited by in corpus (12)

• Family non-universal Z' models with protected flavor-changing interactions
• LHCb anomaly and $B$ physics in flavored Z${}^{\prime }$ models with flavored Higgs doublets
• Constraints on $Z^{\prime }$ Boson within Minimal Flavor Violation
• Lepton polarization effects in "Lambda_b -> Lambda l+l-" decay in family non-universal Z' model
• How large can the branching ratio of $B_s\to {\tau }^{+}{\tau }^{-}$ be ?
• Implication of family non-universal $Z^{\prime }$ model to rare exclusive $b\to s(l\bar{l},\nu \bar{\nu })$ transitions
• LHCb anomaly in $\mathbf{B}\to {\mathbf{K}}^{\ast }{\mathbf{\mu }}^{+}{\mathbf{\mu }}^{-}$ optimised observables and potential of ${\mathbf{Z}}^{\prime }$ Model
• D0 dimuon charge asymmetry from B_s system with Z' couplings and the recent LHCb result
• Analysis of ${\Lambda }_b\to \Lambda l^{+}{l}^{-}$ rare decays in a non-universal $Z^{\prime }$ model
• 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
• Analysis of Angular Observables of ${\Lambda }_b\to \Lambda (\to p\pi ){\mu }^{+}{\mu }^{-}$ Decay in Standard and $Z^{\prime }$ Models
• Study of $B_s^0\to l^{+}{l}^{-}\gamma$ decays in the nonuniversal Z' model