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)).

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)).

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)].

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)].

Spinning hyperons reveal their inner secrets - new measurement by the BESIII collaboration Spinning hyperons reveal their inner secrets - new measurement by the BESIII collaboration

Observation of D⁺→ K_S⁰π⁰μ⁺ν_μ, Test of Lepton Flavor Universality and First Angular Analysis of D⁺→K^*(892^)0barl⁺ν_l The BESIII collaboration has reported “Observation of D+→ KS0π0μ+νμ,, Test of Lepton Flavor Universality and First Angular Analysis of D+→K*(892)0barl+νl”. These results have been published in Physical Review Letters on October 21, 2025. [Phys. Rev. Lett. 135, 171801 (2025)].

Single Inclusive 𝜋± and 𝐾^± Production in 𝑒⁺⁢𝑒⁻ Annihilation The BESIII collaboration has founded the validity of isospin symmetry in parton fragmentation processes through measurements of single inclusive π± and K± production. The results were published in Physical Review Letters on Oct. 8, 2025 [Phys. Rev. 135, 151901 (2025)].

First measurement of ratio for ϕ meson decays into K_S⁰ K_L⁰ and K⁺ K^- through amplitude analysis of D_S⁺→K_S⁰ K_L⁰ π⁺ The BESIII collaboration has reported the ratio of ϕ meson decays into KS0 KL0 and K+ K- in charm meson decays for the first time. The results have been published in Physics Review Letters on 15 October 2025 [Phys. Rev. Lett. 135, 161902 (2025)].

Precision CP symmetry test and Polarization analysis in Σ⁺ decays The BESIII Collaboration has achieved a milestone in hyperon physics by performing the most precise test of CP symmetry and polarization analysis in Σ+ decays to date. The results have been published in Physical Review Letters on Oct. 1, 2025 [Phys. Rev. Lett. 135, 141804 (2025)].

Precise Measurement of the Form Factors in D⁰→K^*(892)^-μ⁺ν_μ  and Test of Lepton Universality with D⁰→K^*(892) Transition The BESIII collaboration has reported “Precise Measurement of the Form Factors in D0→K*(892)-μ+νμ and Test of Lepton Universality with D0→K*(892)-l+νl Decays”. These results have been published in Physical Review Letters on 10 September 2025. [Phys. Rev. Lett. 135, 111803 (2025)].