STUDYING NEW PHYSICS AMPLITUDES IN CHARMLESS Bs DECAYS

A method based on flavour SU(3) is proposed for identifying and extracting New Physics (NP) amplitudes in charmless ∆S = 1 Bs decays using time-dependent CP asymmetries in these decays and in flavour SU(3) related ∆S = 0 decays. For illustration, we assume a hierarchy, ∼ 1 : λ : λ (λ = 0.2), between a dominant ∆S = 1 penguin amplitude, a NP amplitude and a Standard Model amplitude with weak phase γ. An uncertainty from SU(3) breaking corrections, reduced by using ratios of hadronic amplitudes, is further suppressed by a factor λ. We discuss examples for pairs of decays into two neutral vector mesons, Bs → φφ, Bs → φK̄ and Bs → KK̄, B → KK̄, where the magnitude of the NP amplitude, its weak and strong phases can be determined. PACS Categories: 13.25.Hw, 11.30.Er, 12.15.Ji, 14.40.Nd