Anomalous CP-Violation in B_s-Bbar_s Mixing Due to a Light Spin-One Particle

Abstract

The recent measurement of the like-sign dimuon charge asymmetry in semileptonic b-hadron decays by the D0 Collaboration is about 3 sigmas away from the standard-model prediction, hinting at the presence of CP-violating new physics in the mixing of B_s mesons. We consider the possibility that this anomalous result arises from the contribution of a light spin-1 particle. Taking into account various experimental constraints, we find that the effect of such a particle with mass below the b-quark mass can yield a prediction consistent with the anomalous D0 measurement within its one-sigma range.

12 pages, 4 figures, somewhat expanded, references added, main conclusions unchanged, matches published version

References in corpus (7)

• Secluded U(1) below the weak scale
• U-boson production in e+e- annihilations, psi and Upsilon decays, and Light Dark Matter
• Lifetime Difference in B_s mixing: Standard Model and beyond
• Detecting light leptophilic gauge boson at BESIII detector
• Detecting MeV Gauge Bosons With High-Energy Neutrino Telescopes
• Rare $B_s$ decays to $\eta$ and ${\eta }^{\prime }$ final states
• U-boson and the HyperCP exotic events

Cited by in corpus (4)

• On new physics in $\Delta {\Gamma }_d$
• Neutral Gauge Boson Contributions to the Dimuon Charge Asymmetry in B Decays
• Flavour Theory and the LHC Era
• Associated Production of Different Flavor Heavy Quarks Through $W^{\prime }$ Bosons at the LHC