Precise measurement of the branching fractions of $J/\psi \to \bar{\Lambda }{\pi }^{+}{\Sigma }^{-}+c.c.$ and $J/\psi \to \bar{\Lambda }{\pi }^{-}{\Sigma }^{+}+c.c.$

Abstract

Based on a data sample of $(10087\pm 44)\times 10^6$ $J/\psi$ events collected with the BESIII detector, the branching fraction of $J/\psi \to \bar{\Lambda }{\pi }^{+}{\Sigma }^{-}+c.c.$ is measured to be $(1.221\pm 0.002\pm 0.038)\times 10^{-3}$, and the branching fraction of its isospin partner mode $J/\psi \to \bar{\Lambda }{\pi }^{-}{\Sigma }^{+}+c.c.$ is measured to be $(1.244\pm 0.002\pm 0.045)\times 10^{-3}$ with improved precision. Here the first uncertainties are statistical and the second ones systematic. The isospin symmetry of the $\Sigma$ baryon in charmonium hadronic decay and the "$12\%$ rule" are tested, and no violation is found. The potential of using these channels as $\Sigma$ baryon sources for nuclear physics research is studied, and the momentum and angular distributions of these sources are provided.

References in corpus (27)

• Heavy quarkonium: progress, puzzles, and opportunities
• 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
• Kernel Estimation in High-Energy Physics
• Hyperon-nucleon interaction at next-to-leading order in chiral effective field theory
• Strangeness in Nuclei and Neutron Stars
• Method for detector description transformation to Unity and application in BESIII
• TopoAna: A generic tool for the event type analysis of inclusive Monte-Carlo samples in high energy physics experiments
• Hyperon-nucleon interaction within chiral effective field theory revisited
• Number of $J/\psi$ events at BESIII
• Measurements of Sigma+ and Sigma- Time-like Electromagnetic Form Factors for center-of-mass energies from 2.3864 to 3.0200 GeV
• Hyperons: the strange ingredients of the nuclear equation of state
• First observation of psi(2S)-->K_S K_L
• Observation of Thirteen New Exclusive Multi-Body Hadronic Decays of the $\psi (2S)$
• First study of reaction ${\Xi }^{0}n\to {\Xi }^{-}p$ using ${\Xi }^0$-nucleus scattering at an electron-positron collider
• Observation of the decay $\psip\rar\kstark$
• A cornucopia of antineutrons and hyperons from super J/psi factory for next-generation nuclear and particle physics high-precision experiments
• Test of the hyperon-nucleon interaction within leading order covariant chiral effective field theory
• Measurement of Interference between Electromagnetic and Strong Amplitudes in psi(2S) Decays to Two Pseudoscalar Mesons
• Impact of the interference between the resonance and continuum amplitudes on vector quarkonia decay branching fraction measurements
• Phase Difference Between the Electromagnetic and Strong Amplitudes for psi(2S) and J/psi Decays into Pairs of Pseudoscalar Mesons
• Symmetry analysis of charmonium decays to two-baryon final state
• Observation of the decay $\psi (3686)$ $\to$ $\Lambda {\bar{\Sigma }}^{\pm }{\pi }^{\mp }+c.c.$
• Branching fraction measurement of $J/\psi \to K_S{K}_L$ and search for $J/\psi \to K_S{K}_S$
• Measurements of $J/\psi$ and $\psi (2S)$ decays into $\Lambda \bar{\Lambda }{\pi }^0$ and $\Lambda \bar{\Lambda }\eta$

Cited by in corpus (2)

• Study of the decay ψ(3686) \to Σ^{0}\barΣ^{0}ϕ
• Observation of the decay $\psi (3686)\to {\Sigma }^0{\bar{\Sigma }}^0\omega$