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We measure the branching fraction and $CP$ violation asymmetry in the decay $B^{0}to pi^{0}pi^{0}$, using a data sample of $752times 10^{6}$ $Bbar{B}$ pairs collected at the $Upsilon(4S)$ resonance with the Belle detector at the KEKB $e^{+}e^{-}$ collider. The obtained branching fraction and direct $CP$ asymmetry are $ mathcal{B}(Bto pi^{0}pi^{0}) = [1.31 pm 0.19~ text{(stat.)} pm 0.19~ text{(syst.)}] times 10^{-6}$ and $ A_{CP} = +0.14 pm 0.36~ text{(stat.)} pm 0.10~ text{(syst.)}, $ respectively. The signal significance, including the systematic uncertainty, is 6.4 standard deviations. We combine these results with Belles earlier measurements of $B^{0}to pi^{+} pi^{-}$ and $B^{pm} to pi^{pm} pi^{0}$ to exclude the $CP$-violating parameter $phi_{2}$ from the range $15.5^{circ} < phi_{2} < 75.0^{circ}$ at 95% confidence level.
We report a measurement of time-dependent $CP$ violation in $B^0 to K^0_S pi^0 pi^0$ decays using a data sample of $772 times 10^6$ $Bbar{B}$ pairs collected by the Belle experiment runnin g at the $Upsilon (4S)$ resonance at the KEKB $e^+ e^-$ colli
We report the first reconstruction of the $B^{0} to pi^{0} pi^{0}$ decay mode at Belle II using samples of 2019 and 2020 data that correspond to 62.8 fb$^{-1}$ of integrated luminosity. We find $14.0^{+6.8}_{-5.6}$ signal decays, corresponding to a s
An analysis of $B^+ to K_{rm scriptscriptstyle S}^0 pi^+$ and $B^+ to K_{rm scriptscriptstyle S}^0 K^+$ decays is performed with the LHCb experiment. The $pp$ collision data used correspond to integrated luminosities of $1{,fb}^{-1}$ and $2{,fb}^{-1}
Time-integrated $CP$ asymmetries in $D^0$ decays to the final states $K^- K^+$ and $pi^- pi^+$ are measured using proton-proton collisions corresponding to $3mathrm{,fb}^{-1}$ of integrated luminosity collected at centre-of-mass energies of $7mathrm{
We report the measurement of the branching fraction and $CP$ asymmetry for the $bar{B}^{0}(B^{0})to K^{0}_{S}K^{mp}pi^{pm}$ decay. The analysis is performed on a data sample of 711 $rm{fb}^{-1}$ collected at the $Upsilon(4S)$ resonance with the Belle