Observation of the $J/\psi$ and $\psi (3686)$ decays into $\eta {\Sigma }^{+}{\bar{\Sigma }}^{-}$

Abstract

The decays $J/\psi \to \eta {\Sigma }^{+}\bar{\Sigma }{}^{-}$ and $\psi (3686)\to \eta {\Sigma }^{+}\bar{\Sigma }{}^{-}$ are observed for the first time, using $(10087\pm 44)\times 10^6$ $J/\psi$ and $(448.1\pm 2.9)\times 10^6$ $\psi (3686)$ events collected with the BESIII detector at the BEPCII collider. We determine the branching fractions of these two decays to be $\mathcal{B}(J/\psi \to \eta {\Sigma }^{+}\bar{\Sigma }{}^{-})=(6.34\pm 0.21\pm 0.37)\times 10^{-5}$ and $\mathcal{B}(\psi (3686)\to \eta {\Sigma }^{+}\bar{\Sigma }{}^{-})=(9.59\pm 2.37\pm 0.61)\times 10^{-6}$, where the first uncertainties are statistical and the second are systematic. The ratio of these two branching fractions is determined to be $\frac{\mathcal{B}(\psi (3686)\to \eta {\Sigma }^{+}\bar{\Sigma }{}^{-})}{\mathcal{B}(J/\psi \to \eta {\Sigma }^{+}\bar{\Sigma }{}^{-})}=(15.1\pm 3.8)\%$, which is in agreement with the "12\% rule."

arXiv comment9 pages and 10 figures

References in corpus (12)

• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Future Physics Programme of BESIII
• TopoAna: A generic tool for the event type analysis of inclusive Monte-Carlo samples in high energy physics experiments
• Number of $J/\psi$ events at BESIII
• Determination of the number of $\psi (3686)$ events at BESIII
• Hyperon II: Properties of excited hyperons
• Determination of the relative phase in ψ' and J/ψ decays into baryon and antibaryon
• Observation of p pbar pi^0 and p pbar eta in psi' decays
• Observation of $\psi (3686)\to p\bar{p}{\eta }^{\prime }$ and improved measurement of $J/\psi \to p\bar{p}{\eta }^{\prime }$
• First observations of $h_c\to$ hadrons

Cited by in corpus (4)

• Measurement of $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }\eta$ from 3.5106 to 4.6988 GeV and study of $\Lambda \bar{\Lambda }$ mass threshold enhancement
• Observation of the Singly Cabibbo-Suppressed Decay ${\Lambda }_c^{+}\to p{\pi }^0$
• Observation of the $\psi (3686)$ decays into ${\Sigma }^{+}{\bar{\Sigma }}^{-}\omega$ and ${\Sigma }^{+}{\bar{\Sigma }}^{-}\varphi$
• Study of the decay ψ(3686) \to Σ^{0}\barΣ^{0}ϕ