Y. D. Wang

Measurement of Λ baryon polarization in e+e−→ΛΛ¯ at s=3.773 GeV

М. Н. Ачасов, P. Adlarson, S. Ahmed, M. Albrecht et autres

Using a data sample of $\ensuremath{\psi}(3770)$ events collected with the BESIII detector at BEPCII corresponding to an integrated luminosity of $2.9\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$, we report a measurement of $\mathrm{\ensuremath{\Lambda}}$ spin polarization in ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\mathrm{\ensuremath{\Lambda}}\overline{\mathrm{\ensuremath{\Lambda}}}$ at $\sqrt{s}=3.773\text{ }\text{ }\mathrm{GeV}$. The significance of polarization is …

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

Model-Independent Determination of the Spin of the Ω− and Its Polarization Alignment in ψ(3686)→Ω−Ω¯+

М. Н. Ачасов, P. Adlarson, S. Ahmed, M. Albrecht et autres

We present an analysis of the process $\ensuremath{\psi}(3686)\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Omega}}}^{\ensuremath{-}}{\overline{\mathrm{\ensuremath{\Omega}}}}^{+}$ (${\mathrm{\ensuremath{\Omega}}}^{\ensuremath{-}}\ensuremath{\rightarrow}{K}^{\ensuremath{-}}\mathrm{\ensuremath{\Lambda}}$, ${\overline{\mathrm{\ensuremath{\Omega}}}}^{+}\ensuremath{\rightarrow}{K}^{+}\overline{\mathrm{\ensuremath{\Lambda}}}$, $\mathrm{\ensuremath{\Lambda}}\ensuremath{\rightarrow}p{\ensuremath{\pi}}^{\ensuremath{-}}$, $\overline{\mathrm{\ensuremath{\Lambda}}}\ensuremath{\rightarrow}\overline{p}{\ensuremath{\pi}}^{+}$) based on a dataset of $448\ifmmode\times\else\texttimes\fi{}{10}^{6}\text{ }\text{ }\ensuremath{\psi}(3686)$ decays collected with the BESIII detector at the BEPCII electron-positron collider. The helicity amplitudes for the process $\ensuremath{\psi}(3686)\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Omega}}}^{\ensuremath{-}}{\overline{\mathrm{\ensuremath{\Omega}}}}^{+}$ and the decay parameters …

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

Observation of the helicity-selection-rule suppressed decay of the $χ_{c2}$ charmonium state

М. Н. Ачасов, S. Ahmed, X. Ai, O. Albayrak et autres

The decays of $χ_{c2}\to K^{+}K^{-}π^{0}$, $K_{S} K^{\pm}π^{\mp}$ and $π^{+}π^{-}π^{0}$ are studied with the $ψ(3686)$ data samples collected with the Beijing Spectrometer (BESIII). For the first time, the branching fractions of $χ_{c2}\to K^{\ast}\overline{K}$, $χ_{c2}\to a_{2}^{\pm}(1320)π^{\mp}/a_{2}^{0}(1320)π^{0}$ and $χ_{c2}\to ρ(770)^{\pm}π^{\mp}$ are measured. Here $K^{\ast}\overline{K}$ denotes …