Abstract
I propose an alternative method for measuring the CP violating phase ϕ2(α) without ambiguity in an extended SU (3) flavour symmetry analysis, which can ultimately be achieved by exploiting interference effects between B → AP and B → VV decay channels, where A, V, P indicates an axial-vector, vector and pseudo-scalar meson, respectively. Under certain assumptions on the relevant decays based on current experimental results and minimal theoretical input, I demonstrate with an idealised amplitude model that a programme to extract a single solution for ϕ2 in the range [0, π], with the added possibility to simultaneously constrain non-factorisable SU(3)-breaking effects, could be executed to similar precision using Run 3 data at LHCb and the final Belle II sample.
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Dalseno, J. Resolving the ϕ2 (α) ambiguity in \( {\mathrm{B}}^0\to {\mathrm{a}}_1^{\pm }{\uppi}^{\mp } \). J. High Energ. Phys. 2019, 191 (2019). https://doi.org/10.1007/JHEP10(2019)191
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DOI: https://doi.org/10.1007/JHEP10(2019)191