BESIII sets world's most stringent direct limit on Lambda hyperon electric dipole moment

The BESIII Collaboration, under the Institute of High Energy Physics of the Chinese Academy of Sciences, has set the world’s most stringent direct limit on the electric dipole moment of the Lambda hyperon. By leveraging quantum-entangled Lambda and anti-Lambda pairs generated in J/ψ particle decays, the team achieved a sensitivity improvement of roughly three orders of magnitude over prior measurements. This breakthrough offers a novel method to investigate charge-parity violation in strange-quark-containing particles, advancing the search for physics beyond the Standard Model.