News&Events

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  BESIII reported Precise Measurement of CP Violation in Ξ⁻ Hyperon Decays The BESIII Collaboration has reported the most precise determination to date of the strong and weak phase differences in Ξ⁻ hyperon decays, along with new constraints on CP symmetry violation. The result has been published in Physical Review Letters [Phys. Rev. Lett. 136, 201802 (2026)].
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  BESIII Reports First Observation of Antihyperon–Nucleon Annihilation into Multi-Meson Final States Recently, the BESIII collaboration has achieved a significant breakthrough in the study of antihyperon–nucleon interactions by observing, for the first time, the annihilation processes of an anti-Lambda hyperon with a proton into multi-meson final states. The results of this study have been published in Physical Review Letters (Phys. Rev. Lett. 136, 171904 (2026)).
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  First Measurement of the Ds⁺→K⁰μ⁺ν_μ Decay The BESIII collaboration has reported the study of “First Measurement of the Ds⁺→K⁰μ⁺νμ Decay” and the first measurement for the semileptonic muonic decay in the Ds⁺→K⁰ transition was reported. The relevant results have been published in Physical Review Letters on 22 April 2026. [Phys. Rev. Lett. 136, 161802 (2026)].
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  BESIII Experiment Observes Threshold Enhancement Effect in Dipion System Recently, the BESIII international collaboration experiment achieved a major breakthrough in charmonium decay research by, for the first time, observing a distinct "resonance-like" structure at the dipion mass threshold. The results of this study were published on April 8, 2026 in Physical Review Letters (Phys. Rev. Lett. 136, 141902 (2026)).
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  Observation of New Radiative Decays of Excited Hyperons Λ(1520)/Λ(1690) at BESIII On April 8, 2026, the BESIII Collaboration achieved a significant breakthrough in the study of electromagnetic radiative decays of excited hyperons: for the first time, the radiative decays of the excited states Λ(1520) and Λ(1690) into a photon (γ) and a Σ⁰ particles were observed. This result has been published in Physical Review Letters (Phys. Rev. Lett. 136, 141801 (2026)).
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  Physics and Software Workshop in Spring 2026, Mar. 23-26, 2026 ,China University of Geosciences (Wuhan, China) The BESIII Physics & Software workshop in Spring 2026 was held during March 23-26th at China University of Geosciences (Wuhan, China).
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  Study of the Magnetic Dipole Transition of J/ψ → γη_c via η_c → ppbar ​ The BESIII collaboration has reported “Study of the Magnetic Dipole Transition of J/ψ → γηc via ηc → ppbar”. These results have been published in Physical Review Letters on 3rd Feb 2026 [Phys. Rev. Lett. 136, 051901 (2026)].
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  Observation of the Singly Cabibbo Suppressed Decay D⁰→b₁(1235)⁻e⁺νₑ and evidence for D⁺→b₁(1235)⁰e⁺νₑ The BESIII collaboration has reported “Observation of the Singly Cabibbo Suppressed Decay D⁰→b₁(1235)⁻e⁺νₑ and evidence for D⁺→b₁(1235)⁰e⁺νₑ”. The results have been published in Physical Review Letters on January 13, 2026. [Phys. Rev. Lett. 136, 021801 (2026)].
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  Collaboration Meeting in Winter 2025, Nov. 30- Dec. 5, IHEP The Collaboration Meeting in Winter 2025 was held at IHEP from 30th November to 5th December, 2025. This was a hybrid meeting held in person and also online via ZOOM.
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  Spinning hyperons reveal their inner secrets - new measurement by the BESIII collaboration Spinning hyperons reveal their inner secrets - new measurement by the BESIII collaboration