Search for $X(1870)$ via the decay $J/\psi\to \omega K^+ K^-\eta$

TL;DR

This study searches for the $X(1870)$ particle in $J/\psi$ decays but finds no significant signal, setting an upper limit on its decay probability and measuring the overall decay rate of the process.

Contribution

First search for $X(1870)$ in $J/\psi o \omega K^+ K^-\eta$ decays, establishing upper limits and measuring the decay branching fraction.

Findings

No significant $X(1870)$ signal observed.

Upper limit on $J/\psi o \omega X(1870)$ decay branching fraction.

Measured branching fraction of $J/\psi o \omega K^+ K^-\eta$ as $(3.33 extpm0.02 ext{(stat.)} extpm0.12 ext{(syst.)}) imes 10^{-4}$.

Abstract

Using a sample of $(10087\pm 44)\times10^{6}$ $J/\psi$ events collected by the BESIII detector at the BEPCII collider, we search for the decay $X(1870)\to K^+ K^-\eta$ via the $J/\psi\to \omega K^+ K^- \eta$ process for the first time. No significant $X(1870)$ signal is observed. The upper limit on the branching fraction of the decay $ J/\psi\to \omega X(1870) \to\omega K^+ K^- \eta$ is determined to be $9.55\times 10^{-7}$ at the $90\%$ confidence level. In addition, the branching faction $B(J/\psi\to\omega K^+ K^- \eta)$ is measured to be $(3.33\pm0.02(\rm{stat.})\pm 0.12(\rm{syst.}))\times 10^{-4}$.