Heavy Flavor & Dark Sector

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We consider some contributions to rare processes in B meson decays from a Dark Sector containing 2 light unstable scalars, with large couplings to each other and small mixings with Standard Model Higgs scalars. We show that existing constraints allow for an exotic contribution to high multiplicity final states with a branching fraction as large as O(10⁻⁴), and that exotic particles could appear as narrow resonances or long lived particles which are mainly found in high multiplicity final states from B decays.