000003845 001__ 3845
000003845 005__ 20230922061708.0
000003845 037__ $$aBELLE2-CONF-PROC-2023-033
000003845 041__ $$aeng
000003845 100__ $$aSanjeeda Bharati Das
000003845 245__ $$aMeasurement of raw asymmetry in  $D^{0}\longrightarrow K^{0}_{s}K^{0}_{s}$  decay at Belle II
000003845 260__ $$a$$c2023-09-15
000003845 300__ $$a2
000003845 520__ $$aThe decay $D^{0}\longrightarrow K^{0}_{s}K^{0}_{s}$ is a singly Cabibbo-suppressed transition that involves the interference between $c\overline{u}\longrightarrow s\overline{s}$ and $c\overline{u}\longrightarrow d\overline{d}$ amplitudes, mediated by the exchange of a W boson at the tree level, that can generate CP asymmetries at the 1% level, even if the Cabibbo-Kobayashi-Maskawa phase is the only source of CP. Current experimental measurements of the CP asymmetry in $D^{0}\longrightarrow K^{0}_{s}K^{0}_{s}$ decays are still limited by the statistical precision. In this work, the signal yield and corresponding raw asymmetry (Araw) for $D^{0}\longrightarrow K^{0}_{s}K^{0}_{s}$ is measured using Belle II Monte Carlo (MC) samples at integrated luminosity of 1 ab^{−1}. The final goal of this analysis is to measure the CP asymmetry in $D^{0}\longrightarrow K^{0}_{s}K^{0}_{s}$, $D^{0}\longrightarrow K^{+}K^{-}$ using as the reference mode, with (Belle + Belle II) dataset.
000003845 700__ $$aKavita Lalwani
000003845 8560_ $$f2018rpy9055@mnit.ac.in
000003845 8564_ $$uhttps://docs.belle2.org/record/3845/files/DAE_NP_sanjeeda_v2.pdf