A method is developed to relate amplitudes for B_s^0 → K_S K* resonances in the two final states, enabling the first tagged decay-time-dependent Dalitz analysis to measure the effective weak phase φ_s^eff.
Aaijet al.,Improved branching fraction measure- ments of B0 (s) →K 0 Sh+h′− decays and first observation of B0 s →K 0 SK+K −, arXiv:2603.08621, submitted to JHEP
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Method to study $CP$ violation in $B_s^0\to K_S K^\pm \pi^\mp$ decays
A method is developed to relate amplitudes for B_s^0 → K_S K* resonances in the two final states, enabling the first tagged decay-time-dependent Dalitz analysis to measure the effective weak phase φ_s^eff.