Axigluon on like-sign charge asymmetry ${\mathcal{A}}_{s\ell }^b$, FCNCs and CP asymmetries in B decays

Abstract

A non-universal axigluon in generalized chiral color models leads to flavor changing neutral currents (FCNCs) at tree level. We analyze phenomenologically the new contributions to $B_q$ (q=d, s) mixing and the related CP asymmetries (CPAs) that are generated by axigluon exchange. We find that although $\Delta m_{B_q}$ can give a strict constraint on the parameters of $b\to q$ transition, the precise measurement of $\sin 2{\beta }_{J/\Psi K^0}$ can further exclude the parameter space of $b\to d$ transition. The axigluon-mediated effects can enhance the like-sign dimuon charge asymmetry ${\mathcal{A}}_{s\ell }^b$ by one order of magnitude larger than the standard model prediction. Accordingly, large CPA $\sin 2{\beta }_s^{J/\Psi \varphi }$ and CPA difference $\sin 2{\beta }_{J\Psi K^0}-\sin 2{\beta }_{\varphi K^0}$ are achieved.

pages 1+18, 8 figures, figures added, discussions extended and references added and updated, version to be published in Physics Letters B

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• Z-mediated charge and CP asymmetries and FCNCs in $B_{d,s}$ processes
• A fourth generation, anomalous like-sign dimuon charge asymmetry and the LHC
• Triangle Relation of Dark Matter, EDM and CP Violation in B0 Mixing in a Supersymmetric Q6 Model
• Implications of large dimuon CP asymmetry in B_{d,s} decays on minimal flavor violation with low tan beta
• Like-sign dimuon charge asymmetry in Randall-Sundurm model
• Long-Distance Contribution to ΔΓs/Γs of the $B_s-{\bar{B}}_s$ System
• CP Violating Lepton Asymmetry from B Decays in Supersymmetric Grand Unified Theories
• Reevaluating R-parity Violating Supersymmetry Effects in B_s^0-\bar{B}_s^0 Mixing
• Light Axigluon Contributions to b-bbar and c-cbar Asymmetry and Constraints on Flavor Changing Axigluon Currents
• Dimuon CP Asymmetry in B Decays and Wjj Excess in Two Higgs Doublet Models
• Mixing asymmetries in B meson systems, the D0 like-sign dimuon asymmetry and generic New Physics
• Colored bosons on top FBA and angular cross section for $t\bar{t}$ production