BELLE2-CONF-PROC-2021-007

Rare Charm Decays at Belle II

Latika Aggarwal

14 March 2021

Abstract: Belle II detector, situated at the SuperKEKB $e^{+}e^{-}$ accelerator (plan to have $8 \times 10^{35}cm^{-2}s^{-1}$ instantaneous luminosity), will collect 50 times larger data than the Belle detector. This will allow one to do more precise measurements and tests of the Standard Model(SM). Flavor Changing Neutral Current (FCNC) processes are forbidden at the tree level in the SM. However, there are several new physics (NP) models that can enhance the branching fractions of the FCNC. $D^{0} \to \gamma \gamma$ is one such decay mode sensitive to the NP searches. We will talk about the prospectus of the charm rare decays at Belle II (focusing on the $D^{0} \to \gamma \gamma$ decay mode). Further, we will also demonstrate the capability of the Belle II detector in reconstructing the charm mesons from the neutral candidates ($K_S^{0}$ and $\pi^{0}$). The data/MC study of the neutral candidates uses the most recently collected data by the Belle II detector.

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