Study of Scalar Mesons at BES-II

TL;DR

This paper reports on BES-II experiment results studying scalar mesons through various decay channels of J/psi and psi' particles, revealing new scalar states and production mechanisms in electron-positron collisions.

Contribution

It presents new experimental observations of scalar mesons, including the X(1810), and analyzes their production in J/psi and chi_c0 decays, advancing hadron spectroscopy knowledge.

Findings

Observation of X(1810) in J/psi radiative decay

Detection of scalar pair production in chi_c0 decays

Insights into scalar meson production mechanisms

Abstract

Recent results from BES-II experiment on hadron spectroscopy using $\jpsi$ and $\psi^\prime$ data samples collected in $e^+e^-$ annihilation are presented, including study of the scalar particles in $\jpsi$ radiative and hadronic decays, the observation of X(1810) in $J/\psi \to \gamma \phi \omega$, as well as pair productions of scalars in $\chi_{c0}$ hadronic decays.