2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/201728The decay $B^0 \to K^0 π^0$, dominated by a $b \to s$ penguin amplitude, holds the potential for exhibiting new physics in this amplitude. In the pure QCD penguin limit one expects $\ckp = 0$ and $\skp = \sin 2 β$ for the coefficients of $\cos Δm t$ and $\sin Δm t$ in the time-dependent CP asymmetry. Small non-penguin contributions lead to corrections to these expressions which are calculated in terms of isospin-related $B\to Kπ$ rates and asymmetries, using information about strong phases from experiment. We study the prospects for incisive tests of the Standard Model through examination of these corrections. We update a prediction $\ckp=0.15\pm 0.04$, pointing out the sensitivity of a prediction $\skp\approx 1$ to the measured branching ratio for $B^0\to K^0π^0$ and to other observables.Note added, to be published in Physics Letters BHigh Energy Physics - PhenomenologyHigh Energy Physics - Experimenttext