An Analysis of Bs Decays in the Left-Right-Symmetric Model with Spontaneous CP Violation

Non-leptonic Bs decays into CP eigenstates that are caused by b̄ → c̄cs̄ quark-level transitions, such as Bs → D s D s , J/ψ η ) or J/ψ φ, provide a powerful tool to search for “new physics”, as the CP-violating effects in these modes are tiny in the Standard Model. We explore these effects for a particular scenario of new physics, the left-right-symmetric model with spontaneous CP violation. In our analysis, we take into account all presently available experimental constraints on the parameters of this model, i.e. those implied by Kand B-decay observables; we find that CP asymmetries as large as O(40%) may arise in the Bs channels, whereas the left-right-symmetric model favours a small CP asymmetry in the “gold-plated” mode Bd → J/ψKS. Such a pattern would be in favour of B-physics experiments at hadron machines, where the Bs modes are very accessible. E-mail: [email protected] E-mail: [email protected]