News&Events

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  Observation of a charged scalar a0(1817)* in Charmed-strange meson Ds decay The BESIII Collaboration recently reported the observation of an a0-like state with mass of 1.817 GeV/c2 in DS decays with the data sets collected at the center-of-mass energy region between 4.178 GeV and 4.226 GeV. The paper has been published online in Physical Review Letter. [Phys. Rev. Lett. 129, 182001 (2022) ].
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  Observation of J/ψ Electromagnetic Dalitz Decays to X(1835), X(2120) and X(2370) BESIII recently reports the first observation of J/ψ Electromagnetic (EM) Dalitz decays to X(1835), X(2120) and X(2370) and the measurement of the transition form factor of J/ψ to X(1835). It has been published online in the Journal of Physical Review Letter on July 9, 2022 [Phys. Rev. Lett. 129 (2022) 022002].
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  The most precise measurements of the Lambda Decay Parameter The BESIII collaboration has presented the most precise measurements of CP asymmetry and decay parameters with entangled Λ-Λbar pairs. The results are published in the journal Physical Review Letters 129, 131801 (2022) on Sep. 22 2022.
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  Physics and Software Workshop in Spring 2022, Sep. 13-16, 2022, ONLINE Physics and Software Workshop in Spring 2022, Sep. 13-16, 2022, ONLINE
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  First evidence for the first neutral open-strange hidden-charm tetraquark state The BESIII Collaboration recently reported the evidence of a new exotic multi-quark state, namely Zcs(3985)0. It is the neutral partner of the charged tetraquark Zcs(3985)+ observed in 2021 at BESIII. This is the first candidate of the neutral hidden-charm tetraquark with non-zero strangeness, which marks a new milestone in exploration of the genuine properties of the family of the exotic multi-quark hadrons. The paper has been published in Physical Review Letters [Phy. Rev. Lett. 129 (2022) 112003].
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  First observation of the direct production of a non-vector state in e+e- annihilation The BESIII Collaboration has observed the direct production of an axial vector particle, χc1(1P), in electron-positron (e+e-) annihilation. The paper has been published in Physical Review Letters [Phy. Rev. Lett. 129 (2022) 122001]. This is the first experimental observation of the direct production of a non-vector state in e+e- annihilation process.
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  Observation of resonance structures in e+ e- → π+ π- ψ2(3823) The BESIII experiment recently reported an observation of resonance structures in the e+ e-→π+ π- ψ2(3823) process, and also achieved the most precise mass measurement of theψ2(3823) state. These results have been published in Physical Review Letters [Phys. Rev. Lett. 129, 102003 (2022)].
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  Observation of the X(2600) state The BESIII Collaboration recently reported the observation of a new state, X(2600), using 10 billion Jpsi decay events. It was published online in the Journal of Physical Review Letter on July 19, 2022 [Phys. Rev. Lett. 129 (2022) 042001].
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  Collaboration Meeting in Summer 2022, Jun.13--17, Liaoning Normal University
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  Probing CP symmetry with Entangled Double-strange baryons BESIII Collaboration reports a new method to probe differences between matter and antimatter with an extreme sensitivity. The results are published in the journal Nature on June 2nd 2022.