D0 dimuon charge asymmetry from B_s system with Z' couplings and the recent LHCb result

Abstract

The D0 collaboration has announced the observation of the like-sign dimuon charge asymmetry since 2010, which has more than 3σdeviation from the Standard Model prediction. One of the promising explanation is considering the existence of flavor changing Z' couplings to the b and s quarks which can contribute to the off-diagonal decay width in the B_s - \bar{B}_s mixing. Model construction is highly constrained by the recent LHCb data of 1fb^{-1} integrated luminosity . In this paper, we analyze the experimental constraints in constructing new physics models to explain the dimuon charge asymmetry from the CP violation of the B_s system. We present limits on Z' couplings and show that it is impossible to obtain the 1σrange of the dimuon charge asymmetry without the new contribution in the B_d system. Even with arbitrary contribution in the B_d system, the new couplings must be in the fine tuned region.

34 pages, 12 figures, Additional analyses and references are updated. (Conclusion unchanged.)

References in corpus (16)

• Estimate of BR(B -> X_s gamma) at O(alpha_s^2)
• Evidence for B- -> tau- nu_tau-bar with a Hadronic Tagging Method Using the Full Data Sample of Belle
• 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
• Model-independent constraints on new physics in b --> s transitions
• New Physics in B-Bbar mixing in the light of recent LHCb data
• Possible evidence for the breakdown of the CKM-paradigm of CP-violation
• New Physics contributions to the lifetime difference in D0-anti-D0 mixing
• Direct CP violation in charm and flavor mixing beyond the SM
• New Physics Models of Direct CP Violation in Charm Decays
• Comment on new physics contributions to Gamma_{12}^s
• Search for high-mass resonances decaying into tau-lepton pairs in pp collisions at sqrt(s) = 7 TeV
• Neutral Gauge Boson Contributions to the Dimuon Charge Asymmetry in B Decays
• The D0 same-charge dimuon asymmetry and possibile new CP violation sources in the $B_s-{\bar{B}}_s$ system
• Z' near the Z-pole
• $B_s^0-{\bar{B}}_s^0$ mixing in a family non-universal $Z^{\prime }$ model revisited
• SUSY R-parity violating contributions to the width differences for $D-\bar{D}$ and $B_{d,s}-{\bar{B}}_{d,s}$ systems

Cited by in corpus (5)

• Implications of LHCb measurements and future prospects
• On new physics in $\Delta {\Gamma }_d$
• A search for high-mass resonances decaying to tau+tau- in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• A search for high-mass resonances decaying to ${\tau }^{+}{\tau }^{-}$ in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Mixing asymmetries in B meson systems, the D0 like-sign dimuon asymmetry and generic New Physics