Speaker
睿文 侯
Description
This Letter presents the world’s most precise measurements of direct CP asymmetries in $B^{+} \to K^0_{\mathrm{S}} \pi^{+}$ and $B^{+} \to K^0_{\mathrm{S}} K^{+}$ decays. The measurement precision in the theoretically clean $B^{+} \to K^0_{\mathrm{S}} \pi^{+}$ mode reaches the $\cal{O}$(0.01) level for the first time, providing a stringent test of the Standard Model prediction of zero CP asymmetry, and offering input to resolve the long-standing '$K\pi$ puzzle', where hadronic effects limited the interpretation. These results represent a significant step forward in the study of charmless B decays for testing the Standard Model and probing new sources of CP violation.
