R. Mussa

Observation of the decay $B^0 \to J/\psi \omega$ at Belle II

I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara et autres

We measure the branching fraction of the decay $B^0 \to J/ψω$ using data collected with the Belle II detector at the SuperKEKB collider. The data contain $(387 \pm 6) \times 10^6$ $B\overline{B}$ meson pairs produced in energy-asymmetric $e^+e^-$ collisions at the $Υ(4S)$ …

Measurement of the branching fractions of $B\toη' K$ decays using 2019/2020 Belle II data

F. Abudinén, I. Adachi, R. Adak, K. Adamczyk et autres

This note describes the rediscovery of $B\toη' K$ decays in Belle II data, both in the charged and neutral final state: $B_0\toη' K_S$ and $B^\pm\toη' K^\pm$. The $η'$ is searched for in two decay modes: $η'\toηπ^+π^-$ with $η\toγγ$, and $η'\toργ$. The analysis …

fr (code pays fourni par la source)