Measurements of branching fractions and direct ${it CP}$-violating asymmetries in $B^+ to K^+ pi^0~mbox{and}~pi^+ pi^0$ decays using 2019 and 2020 Belle II data

We report measurements of branching fractions ($mathcal B$) and direct ${it CP}$-violating asymmetries ($mathcal A_{it CP}$) for the decays $B^+to K^+pi^0$ and $B^+ to pi^+pi^0$ reconstructed with the Belle II detector in a sample of asymmetric-energy electron-positron collisions at the $Upsilon(4S)$ resonance corresponding to 62.8 $text{fb}^{-1}$ of integrated luminosity. The results are $mathcal{B}(B^+ to K^+pi^0) = [11.9 ^{+1.1}_{-1.0} (rm stat)pm 1.6(rm syst)]times 10^{-6}$, $mathcal{B}(B^+ to pi^+pi^0) = [5.5 ^{+1.0}_{-0.9} (rm stat)pm 0.7(rm syst)]times 10^{-6}$, $mathcal A_{it CP}(B^+ to K^+pi^0) = -0.09 pm 0.09 (rm stat)pm 0.03(rm syst)$, and $mathcal A_{it CP}(B^+ to pi^+pi^0) = -0.04 pm 0.17 (rm stat)pm 0.06(rm syst)$. The results are consistent with previous measurements and show a detector performance comparable with early Belle performance.