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→Ds+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 K- and 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/ψ KS. Such a pattern would be in favour of B-physics experiments at hadron machines, where the Bs modes are very accessible.