Measurements of the branching fraction and direct $\CP$-violating asymmetry in $\Bz \to \Kz \piz$ decays

Sumitted to PubDB: 2022-10-02

Category: Conference papers and plots, Visibility: Public

Tags: -

Authors	Sagar Hazra, Gagan Mohanty
Non-Belle II authors	A. B. Basith
Date	March 2, 2022
Belle II Number	BELLE2-CONF-PH-2022-002
Abstract	We report the measurements of branching fraction ($\mathcal{B}$) and direct $\CP$-violating asymmetry ($\ACP$) in the charmless decays $\Bz\to K^0\pi^0$ at Belle~II. A sample of $\ep\en$ collisions, corresponding to $189.8\invfb$ of integrated luminosity, recorded near the $\Upsilon(4S)$ resonance is used for the study. We find $135$ signal candidates, and measure $\mathcal{B}(\Bz \to \Kz \piz) = [11.0 \pm 1.2 \stat \pm 1.0 \syst] \times 10^{-6}$ and $\ACP = -0.41_{-0.32}^{+0.30}\stat \pm 0.08\syst$.