Extracting $B \to K^*$ Form Factors from Data

We extract ratios of $B \to K^*$ form factors at low hadronic recoil from recent data on $B \to K^* μ^+ μ^-$ decays in a model-independent way. The presented method will improve in the future with further (angular) studies in semileptonic rare B-decays and advance our understanding of form factors, which are important inputs in precision tests of the Standard Model.

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