Accès ouvert
2018
article
OpenAlex
Mikhail N. Achasov, S. Ahmed, M. Albrecht, M. Alekseev et autres
Using a data sample of $(448.1\ifmmode\pm\else\textpm\fi{}2.9)\ifmmode\times\else\texttimes\fi{}{10}^{6}\text{ }\ensuremath{\psi}(3686)$ events collected with the BESIII detector at the BEPCII collider, we present measurements of branching fractions for the decays ${\ensuremath{\chi}}_{cJ}\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Sigma}}}^{+}{\overline{\mathrm{\ensuremath{\Sigma}}}}^{\ensuremath{-}}$ and ${\mathrm{\ensuremath{\Sigma}}}^{0}{\overline{\mathrm{\ensuremath{\Sigma}}}}^{0}$. The decays ${\ensuremath{\chi}}_{c1,2}\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Sigma}}}^{+}{\overline{\mathrm{\ensuremath{\Sigma}}}}^{\ensuremath{-}}$ and ${\mathrm{\ensuremath{\Sigma}}}^{0}{\overline{\mathrm{\ensuremath{\Sigma}}}}^{0}$ are observed for the first time, and the …
cn, ru, de, it, us, tr, mn, nl
(code pays fourni par la source)
Accès ouvert
2017
article
OpenAlex
Mikhail N. Achasov, S. Ahmed, M. Albrecht, A. Amoroso et autres
Using the data samples of $1.31\ifmmode\times\else\texttimes\fi{}{10}^{9}\text{ }\text{ }J/\ensuremath{\psi}$ events and $4.48\ifmmode\times\else\texttimes\fi{}{10}^{8}\text{ }\text{ }\ensuremath{\psi}(3686)$ events collected with the BESIII detector, partial wave analyses on the decays $J/\ensuremath{\psi}$ and $\ensuremath{\psi}(3686)\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\eta}}^{\ensuremath{'}}$ are performed with a relativistic covariant tensor amplitude approach. The dominant contribution is found …
cn, ru, de, it, us, tr, mn, nl
(code pays fourni par la source)
Accès ouvert
2017
article
OpenAlex
Mikhail N. Achasov, S. Ahmed, M. Albrecht, A. Amoroso et autres
Using a sample of $448.1\ifmmode\times\else\texttimes\fi{}{10}^{6}\text{ }\text{ }\ensuremath{\psi}(3686)$ events collected with the BESIII detector in 2009 and 2012, we study the decays ${\ensuremath{\chi}}_{c0,2}\ensuremath{\rightarrow}{\ensuremath{\eta}}^{\ensuremath{'}}{\ensuremath{\eta}}^{\ensuremath{'}}$ and $\ensuremath{\eta}{\ensuremath{\eta}}^{\ensuremath{'}}$. The decays ${\ensuremath{\chi}}_{c2}\ensuremath{\rightarrow}{\ensuremath{\eta}}^{\ensuremath{'}}{\ensuremath{\eta}}^{\ensuremath{'}}$, ${\ensuremath{\chi}}_{c0}\ensuremath{\rightarrow}\ensuremath{\eta}{\ensuremath{\eta}}^{\ensuremath{'}}$ and ${\ensuremath{\chi}}_{c2}\ensuremath{\rightarrow}\ensuremath{\eta}{\ensuremath{\eta}}^{\ensuremath{'}}$ are observed for the first time with statistical significances of $9.6\ensuremath{\sigma}$, $13.4\ensuremath{\sigma}$ …
cn, ru, de, it, us, tr, mn, nl
(code pays fourni par la source)
Accès ouvert
2017
article
OpenAlex
Mikhail N. Achasov, S. Ahmed, M. Albrecht, M. Alekseev et autres
Using a sample of $1.31\ifmmode\times\else\texttimes\fi{}{10}^{9}\text{ }\text{ }J/\ensuremath{\psi}$ events collected with the BESIII detector at the BEPCII collider, we study the decays of $J/\ensuremath{\psi}\ensuremath{\rightarrow}{K}_{S}{K}_{L}$ and ${K}_{S}{K}_{S}$. The branching fraction of $J/\ensuremath{\psi}\ensuremath{\rightarrow}{K}_{S}{K}_{L}$ is determined to be $\mathcal{B}(J/\ensuremath{\psi}\ensuremath{\rightarrow}{K}_{S}{K}_{L})=(1.93\ifmmode\pm\else\textpm\fi{}0.01(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.05(\mathrm{syst}))\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$, which significantly improves on previous measurements. No …
cn, ru, de, it, us, tr, mn, nl
(code pays fourni par la source)
Accès ouvert
2017
article
OpenAlex
M. Ablikim, Mikhail N. Achasov, S. Ahmed, M. Albrecht et autres
Using a data sample of $448\ifmmode\times\else\texttimes\fi{}{10}^{6}\text{ }\text{ }\ensuremath{\psi}(3686)$ events collected with the BESIII detector operating at the BEPCII storage ring, the decays $\ensuremath{\psi}(3686)\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\eta}$ and $\ensuremath{\psi}(3686)\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\pi}}^{0}$ are observed with a statistical significance of $7.3\ensuremath{\sigma}$ and $6.7\ensuremath{\sigma}$, respectively. The branching fractions are measured to …
cn, ru, de, it, us, tr, mn, nl
(code pays fourni par la source)