Measurement of the branching fraction and search for $CP$ violation in $D^0\to K_S^0{K}_S^0{\pi }^{+}{\pi }^{-}$ decays at Belle

Abstract

We measure the branching fraction for the Singly Cabibbo-suppressed decay $D^0\to K_S^0{K}_S^0{\pi }^{+}{\pi }^{-}$, and we search for $CP$ violation via a measurement of the $CP$ asymmetry $A_{CP}^{}$ and also the $T$-odd triple-product asymmetry $a_{CP}^T$. The later two measurements are complementary. We use 922~fb${}^{-1}$ of data recorded by the Belle experiment, which ran at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider. The branching fraction is measured relative to the Cabibbo-favored normalization channel $D^0\to K_S^0{\pi }^{+}{\pi }^{-}$. Singly Cabibbo-suppressed charm decays are expected to have especially good sensitivity to new physics effects.

Proceeding for FPCP 2022 conference talk

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Cited by in corpus (1)

• Search for $CP$ violation in $D_{(s)}^{+}\to K^{+}{K}_S^0{h}^{+}{h}^{-}$ $(h=K,\pi )$ decays and observation of the Cabibbo-suppressed decay $D_s^{+}\to K^{+}{K}^{-}{K}_S^0{\pi }^{+}$