Observation of a vector charmoniumlike state at 4.7 GeV/c2 and search for Zcs in e+e-→K+K-J/ψ
In the November 21, 2023 issue of Physical Review Letters, the BESIII Collaboration reported the discovery of a vector charmoniumlike state, dubbed the Y(4710), in e+e-→K+K-J/ψ process. The Y(4710) is observed to decay toK+K-J/ψ with a mass of 4.708GeV/c2. Meanwhile, the search for exotic tetraquark states, dubbed Zcs, are also conducted in this process.
The precision test of CP symmetry in hyperon to neutron decays
BESIII Collaboration has performed a precise measurement of CP symmetry in the decay of Σ+ hyperon to neutron. This research has been published in Physics Review Letters on Nov. 9th, 2023 [Phys. Rev. Lett. 131, 191802 (2023)].
Observation of the Narrow Structure near the pΛbar Threshold
The BESIII collaboration has recently reported the observation of a narrow structure near the pΛbar threshold in the e+e-→pK-Λbar+c.c. process. Its quantum number JP is determined for the first time and the resonance parameters are also determined. The detailed results have been published in the journal Physical Review Letters 131, 151901 on Oct. 10 2023.
First Experimental Study of the Weak Decay D_s^*→eν_e at BESIII
The first experimental study of the weak decay Ds*→eνe with entangled Ds-Ds* pairs has been presented by BESIII collaboration. The results are published in the journal Phys. Rev. Lett. 131, 141802 (2023) on Oct. 6 2023.
Search for Λ-Λbar Baryon-Number-Violating Oscillations
The BESIII collaboration has recently presented their results on searching for oscillations between Λbar and Λ in the decay Jpsi to p K- Λbar +c.c. This is the first constraint on the rate of hyperon-anti-hyperon oscillations. The detailed results have been published in the journal Physical Review Letters 131, 121801 on Sep. 19 2023.
The most precision test of CP symmetry in the entangled Ξ^0-Ξbar^0 pairs at BESIII
The BESIII collaboration has presented the most precise measurements of asymmetry and decay parameters with entangled Ξ0-Ξbar0 pairs. The results are published in the journal Physical Review D as a Letter and an Editor’s Suggestion on Aug. 23, 2023 ( PHYSICAL REVIEW D 108, L031106 (2023)).
