Study of the decay \psi(3686) \to \Sigma^{0}\bar{\Sigma}^{0}\phi

TL;DR

This study reports the first observation of the decay (3686) f0 ^{0}ar{}^{0}f0 , measures its branching fraction, and investigates potential intermediate states without finding conclusive evidence.

Contribution

First observation of the decay (3686) f0 ^{0}ar{}^{0}f0  and measurement of its branching fraction with a detailed search for intermediate states.

Findings

Decay (3686) f0 ^{0}ar{}^{0}f0  observed with 7.6cc significance

Branching fraction measured as (2.64 b1 0.32_{ extrm{stat}} b1 0.12_{ extrm{sys}}) d7 10^{-6}

No conclusive evidence of intermediate states or threshold enhancements found

Abstract

Using $(27.12\pm 0.14)\times 10^{8}$ $\psi(3686)$ events collected with the BESIII detector operating at the BEPCII collider, the decay $\psi(3686)\to\Sigma^{0}\bar{\Sigma}^{0}\phi$ is observed for the first time with a statistical significance of 7.6$\sigma$. Its branching fraction is measured to be $(2.64 \pm 0.32_{\textrm{stat}} \pm 0.12_{\textrm{sys}}) \times 10^{-6}$, where the first uncertainty is statistical and the second is systematic. In addition, we search for potential intermediate states in the $\Sigma^{0}\phi$($\bar{\Sigma}^{0}\phi$) invariant mass distribution and a possible threshold enhancement in the $\Sigma^{0}\bar{\Sigma}^{0}$ system, but no conclusive evidence of is observed.