Anatomy of prominent B and K decays and signatures of CP-violating new physics in the electroweak penguin sector Original Research Article

The recent observation of image at the B factories with a surprisingly large branching ratio represents a challenge for theory, and complements the amazingly small image rate. We point out that all puzzling image features can be accommodated in the Standard Model (SM) through non-factorizable hadronic interference effects, extract the relevant parameters, and predict the CP asymmetries of image. Using then image flavour-symmetry and plausible dynamical assumptions, we fix the hadronic image parameters through their image counterparts, and determine the CKM angle γ, with a result in remarkable accordance with the usual fits for the unitarity triangle. We may then analyse the image system in the SM, where we find agreement with the experimental picture, with the exception of those observables that are significantly affected by electroweak (EW) penguins, thereby suggesting new physics (NP) in this sector. Indeed, a moderate enhancement of these topologies and a large CP-violating NP phase allow us to describe any currently observed feature of the image modes, and to predict the CP-violating image observables. If we then restrict ourselves to a specific scenario where NP enters only through image penguins, we obtain a link to rare K and B decays, where the most spectacular NP effects are an enhancement of the image rate by one order of magnitude with image, image, image, and a large forward–backward CP asymmetry in image. We address also image and other prominent decays, including image and image modes.