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)].

First Measurement of the Decay Dynamics in the Semileptonic Transition of the D⁺(0) into the Axial-vector Meson K₁(1270) The BESIII collaboration has reported “First Measurement of the Decay Dynamics in the Semileptonic Transition of the D+(0) into the Axial-vector Meson K1(1270)”. These results have been published in Physical Review Letters on 25 August 2025. [Phys. Rev. Lett. 135, 091801 (2025)].