# Measurements of the absolute branching fractions and $CP$ asymmetries for $D^+\rightarrow K_{S,L}^0 K^+(\pi^0)$

## TL;DR

This study measures absolute branching fractions and $CP$ asymmetries for specific $D^+$ meson decays using BESIII data, providing new measurements and confirming previous results with no significant $CP$ violation observed.

## Contribution

First-time measurements of three $D^+$ decay branching fractions and $CP$ asymmetries using BESIII data, improving precision and confirming consistency with world averages.

## Key findings

- Branching fractions measured with statistical and systematic uncertainties.
- No significant $CP$ asymmetry detected in the studied decays.
- Results are consistent with previous measurements and theoretical expectations.

## Abstract

Using $e^+e^-$ collision data corresponding to an integrated luminosity of 2.93 fb$^{-1}$ taken at a center-of-mass energy of 3.773 GeV with the BESIII detector, we determine the absolute branching fractions $\mathcal{B}(D^+\rightarrow K_S^0 K^+)$ = $(3.02 \pm 0.09 \pm 0.08)\times10^{-3}$, $\mathcal{B}(D^+\rightarrow K_S^0 K^+ \pi^0)$ = $(5.07 \pm 0.19 \pm 0.23)\times10^{-3}$, $\mathcal{B}(D^+\rightarrow K_L^0 K^+)$ = $(3.21 \pm 0.11 \pm 0.11)\times10^{-3}$, and $\mathcal{B}(D^+\rightarrow K_L^0 K^+ \pi^0)$ = $(5.24 \pm 0.22 \pm 0.22)\times10^{-3}$, where the first and second uncertainties are statistical and systematic, respectively. The branching fraction \wbrksk is consistent with the world average value and the other three branching fractions are measured for the first time. We also measure the $CP$ asymmetries for the four decays and do not find a significant deviation from zero.