T. Wang

Measurements of the absolute branching fractions of Ω− decays and test of the ΔI=1/2 rule

М. Н. Ачасов, P. Adlarson, X. Ai, R. Aliberti et autres

Based on a dataset of $(27.12\ifmmode\pm\else\textpm\fi{}0.10)\ifmmode\times\else\texttimes\fi{}{10}^{8}$ $\ensuremath{\psi}(3686)$ events collected at the BESIII experiment, the absolute branching fractions of the three dominant ${\mathrm{\ensuremath{\Omega}}}^{\ensuremath{-}}$ decays are measured to be ${\mathcal{B}}_{{\mathrm{\ensuremath{\Omega}}}^{\ensuremath{-}}\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Xi}}}^{0}{\ensuremath{\pi}}^{\ensuremath{-}}}=\phantom{\rule{0ex}{0ex}}(25.03\ifmmode\pm\else\textpm\fi{}0.44\ifmmode\pm\else\textpm\fi{}0.53)%$, ${\mathcal{B}}_{{\mathrm{\ensuremath{\Omega}}}^{\ensuremath{-}}\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Xi}}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}}=(8.43\ifmmode\pm\else\textpm\fi{}0.52\ifmmode\pm\else\textpm\fi{}0.28)%$, and ${\mathcal{B}}_{{\mathrm{\ensuremath{\Omega}}}^{\ensuremath{-}}\ensuremath{\rightarrow}\mathrm{\ensuremath{\Lambda}}{K}^{\ensuremath{-}}}=(66.3\ifmmode\pm\else\textpm\fi{}0.8\ifmmode\pm\else\textpm\fi{}2.0)%$, where the first and second uncertainties are statistical and systematic, respectively. …

cn, ru, se, de, it, pl, mn, us, tr, kr, gb (code pays fourni par la source)

Observation of the decay Ds+→ωπ+η

М. Н. Ачасов, P. Adlarson, M. Albrecht, R. Aliberti et autres

Using $7.33\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of ${e}^{+}{e}^{\ensuremath{-}}$ collision data collected by the BESIII detector at c.m. energies between 4.128 GeV and 4.226 GeV, we observe for the first time the decay ${D}_{s}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}\ensuremath{\omega}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\eta}$ with a statistical significance of $7.6\ensuremath{\sigma}$. The measured branching fraction of …

cn, ru, se, de, it, pl, mn, us, tr, gb (code pays fourni par la source)

Observation of $e^+e^-\toπ^0π^0ψ_2(3823)$

BESIII Collaboration, M. Ablikim, М. Н. Ачасов, P. Adlarson et autres

Using a data sample corresponding to an integrated luminosity of 11.3 $\rm fb^{-1}$ collected at center-of-mass energies from $4.23$ to $4.70$~GeV with the BESIII detector, we observe the process $e^+e^-\toπ^0π^0ψ_2(3823)$ for the first time with a statistical significance of $6.0σ$. The ratio …