Cross section measurements of e+e−→ωχc0 from s=4.178 to 4.278 GeV

Résumé fourni par la source

The cross section of the process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\omega}{\ensuremath{\chi}}_{c0}$ is measured at center-of-mass energies from $\sqrt{s}=4.178$ to 4.278 GeV using a data sample of $7\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected with the BESIII detector operating at the BEPCII storage ring. The dependence of the cross section on $\sqrt{s}$ shows a resonant structure with mass of $(4218.5\ifmmode\pm\else\textpm\fi{}1.6(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}4.0(\mathrm{syst}))\text{ }\text{ }\mathrm{MeV}/{c}^{2}$ and width of $(28.2\ifmmode\pm\else\textpm\fi{}3.9(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}1.6(\mathrm{syst}))\text{ }\text{ }\mathrm{MeV}$, respectively. This observation confirms and improves upon the result of a previous study. The angular distribution of the ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\omega}{\ensuremath{\chi}}_{c0}$ process is extracted for the first time.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.