Improved measurements of ${\chi }_{cJ}\to {\Sigma }^{+}{\bar{\Sigma }}^{-}$ and ${\Sigma }^0{\bar{\Sigma }}^0$ decays

Abstract

Using a data sample of $(448.1\pm 2.9)\times 10^6\psi (3686)$ events collected with the BESIII detector at the BEPCII collider, we present measurements of branching fractions for the decays ${\chi }_{cJ}\to {\Sigma }^{+}{\bar{\Sigma }}^{-}$ and ${\Sigma }^0{\bar{\Sigma }}^0$. The decays ${\chi }_{c1,2}\to {\Sigma }^{+}{\bar{\Sigma }}^{-}$ and ${\Sigma }^0{\bar{\Sigma }}^0$ are observed for the first time, and the branching fractions for ${\chi }_{c0}\to {\Sigma }^{+}{\bar{\Sigma }}^{-}$ and ${\Sigma }^0{\bar{\Sigma }}^0$ decays are measured with improved precision. The branching fraction ratios between the charged and neutral modes are consistent with the prediction of isospin symmetry.

9 pages, 4 figures; Accepted by PRD

References in corpus (5)

• Determination of the number of $\psi (3686)$ events at BESIII
• Towards a dynamical understanding of the non-$D\bar{D}$ decay of $\psi (3770)$
• The evasion of helicity selection rule in ${\chi }_{c1}\to VV$ and ${\chi }_{c2}\to VP$ via intermediate charmed meson loops
• Further study of the helicity selection rule evading mechanism in ${\eta }_c$, ${\chi }_{c0}$ and $h_c$ decaying to baryon anti-baryon pairs
• Measurements of Baryon Pair Decays of ${\chi }_{cJ}$ Mesons

Cited by in corpus (3)

• First observation of the decay ${\chi }_{cJ}\to {\Sigma }^{+}\bar{p}{K}_S^0+c.c.(J=0,1,2)$
• First Measurements of ${\chi }_{cJ}\to {\Sigma }^{-}{\bar{\Sigma }}^{+}(J=0,1,2)$ Decays
• Helicity amplitude and branching fraction measurement of ${\chi }_{cJ}\to \Lambda \bar{\Lambda }$