Where hidden particles might show up in rare B meson decays

B mesons decay in ways that should tell us about CP violation and the geometry of the quark mixing matrix. Recent experiments disagree with theoretical predictions for certain decay rates, suggesting new particles or forces might be at play. This analysis constrains what those new physics contributions could be using multiple decay channels and asymmetries, then predicts specific signatures—like CP asymmetries in B decays—that the next generation of measurements should catch.