Branching fraction measurement of $J/\psi \to K_S{K}_L$ and search for $J/\psi \to K_S{K}_S$

Abstract

Using a sample of $1.31\times 10^9$ $J/\psi$ events collected with the BESIII detector at the BEPCII collider, we study the decays of $J/\psi \to K_S{K}_L$ and $K_S{K}_S$. The branching fraction of$J/\psi \to K_S{K}_L$ is determined to be $\mathcal{B}(J/\psi \to K_S{K}_L)=(1.93\pm 0.01(stat.)\pm 0.05(syst.))\times 10^{-4}$, which significantly improves on previous measurements. No clear signal is observed for the $J/\psi \to K_S{K}_S$ process, and the upper limit at the 95% confidence level for its branching fraction is determined to be $\mathcal{B}(J/\psi \to K_S{K}_S)<1.4\times 10^{-8}$, which improves on the previous searches by two orders in magnitude and reaches the order of the Einstein-Podolsky-Rosen expectation.

arXiv comment7 pages, 4 figures. Minor revisions, matched to the version in Physical Review D

References in corpus (10)

• 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
• Limits and Confidence Intervals in the Presence of Nuisance Parameters
• Determination of the number of $J/\psi$ events with inclusive $J/\psi$ decays
• Improved measurement of the branching ratio of J/psi-->K_S K_L
• Study of the $e^{+}{e}^{-}\to K^{+}{K}^{-}$ reaction in the energy range from 2.6 to 8.0 GeV
• Phase Difference Between the Electromagnetic and Strong Amplitudes for psi(2S) and J/psi Decays into Pairs of Pseudoscalar Mesons
• Clean Prediction of \CP violating processes $\psi$, $\varphi$ and ${\rm Y}(1S)$ decay to KsKs and KLKL
• Search for K_S K_S in J/psi and psi(2S) decays

Cited by in corpus (5)

• Precise measurement of the branching fractions of $J/\psi \to \bar{\Lambda }{\pi }^{+}{\Sigma }^{-}+c.c.$ and $J/\psi \to \bar{\Lambda }{\pi }^{-}{\Sigma }^{+}+c.c.$
• Symmetry analysis of charmonium two-body decay
• Test of quantum nonlocality via vector meson decays to $K_S{K}_S$
• Search for $J/\psi \to K_S^0{K}_S^0$ and $\psi (3686)\to K_S^0{K}_S^0$
• Study of $C$ parity violating and strangeness changing $J/\psi$ $\to$ $PP$ weak decays