Speaker
Description
The Belle$~$II experiment has collected a 362 fb$^{-1}$ sample of $e^+e^-\to B\bar{B}$ decays at the $\Upsilon(4S)$ resonance. The asymmetric-energy SuperKEKB collider provides a boost to the $B$ mesons in the laboratory frame, enabling measurements of time-dependent $C\!P$ violation. We present measurements of both time-dependent and direct $C\!P$ violation in hadronic $B$ decays. Among the new results, we measure $C\!P$-violating parameters related to the determination of the least well-known angle of the unitarity triangle, $\phi_2$ (also known as $\alpha$), using the decays $B^0\to\rho^+\rho^-$ and $B^0\to \pi^0\pi^0$. In addition, the penguin-sensitive $B^0\to J/\psi\pi^0$ decay is studied; the results from this mode constrain the systematic effects related to the determination of the unitarity-triangle angle $\phi_1$ (also known as $\beta$).
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