Search for $J/\psi \to K_S^0{K}_S^0$ and $\psi (3686)\to K_S^0{K}_S^0$

Abstract

Using data samples of $(10087\pm 44)\times 10^6$ $J/\psi$ events and $(2712.4\pm 14.3)\times 10^6$ $\psi (3686)$ events collected with the BESIII detector at the BEPCII collider, we search for the CP violating decays $J/\psi \to K_S^0{K}_S^0$ and $\psi (3686)\to K_S^0{K}_S^0$. No significant signals are observed over the expected background yields. The upper limits on their branching fractions are set as $\mathcal{B}(J/\psi \to K_S^0{K}_S^0)<4.7\times 10^{-9}$ and $\mathcal{B}(\psi (3686)\to K_S^0{K}_S^0)<1.1\times 10^{-8}$ at the 90% confidence level. These results improve the previous limits by a factor of three for $J/\psi \to K_S^0{K}_S^0$ and two orders of magnitude for $\psi (3686)\to K_S^0{K}_S^0$.

References in corpus (18)

• 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
• ParticleNet: Jet Tagging via Particle Clouds
• Measurement of the ${\mathrm{e}}^{+}{\mathrm{e}}^{-}\to {\pi }^{+}{\pi }^{-}$ Cross Section between 600 and 900 MeV Using Initial State Radiation
• Method for detector description transformation to Unity and application in BESIII
• Number of $J/\psi$ events at BESIII
• Novel type of CPT violation for correlated EPR states
• Decoherence induced CPT violation and entangled neutral mesons
• Determination of the number of $\psi (3686)$ events taken at BESIII
• Amplitude analysis of the $K_S{K}_S$ system produced in radiative $J/\psi$ decays
• Intrinsic CPT violation and decoherence for entangled neutral mesons
• Clean Prediction of \CP violating processes $\psi$, $\varphi$ and ${\rm Y}(1S)$ decay to KsKs and KLKL
• Branching fraction measurement of $J/\psi \to K_S{K}_L$ and search for $J/\psi \to K_S{K}_S$
• Search for K_S K_S in J/psi and psi(2S) decays
• About Detecting CP-Violating Processes in $J/ψ\to \KzKzb $ Decay
• Test of quantum nonlocality via vector meson decays to $K_S{K}_S$