Measurement of the Born cross section for $e^{+}e^{-}\to \eta h_c $ at center-of-mass energies between 4.1 and 4.6\,GeV

BESIII Collaboration, F. De Mori, М. Н. Ачасов, P. Adlarson, O. Afedulidis, X. Ai, R. Aliberti, A. Amoroso, Q. An, Y. Bai

Abstract

We measure the Born cross section for the reaction $e^{+}e^{-} \rightarrow \eta h_c$ from $\sqrt{s} = 4.129$ to $4.600$~GeV using data sets collected by the BESIII detector running at the BEPCII collider. A resonant structure in the cross section line shape near 4.200~GeV is observed with a statistical significance of 7$\sigma$. The parameters of this resonance are measured to be \MeasMass\ and \MeasWidth, where the first uncertainties are statistical and the second systematic.

Locations

• arXiv (Cornell University) - View - PDF